town of gillam water treatment · this environment act proposal has been prepared by stantec...

Town of Gillam Water Treatment Plant Environment Act Proposal

Final Report

May 13, 2020

Prepared for: Town of Gillam c/o of PCL Construction Prepared by: Stantec Consulting Ltd. 500-311 Portage Avenue Winnipeg, MB R3B 2B9

TOWN OF GILLAM WATER TREATMENT PLANT ENVIRONMENT ACT PROPOSAL

This document entitled Town of Gillam Water Treatment Plant Environment Act Proposal was prepared by Stantec Consulting Ltd. (“Stantec”) for the account of Town of Gillam/PCL Construction (“Client”). Any reliance on this document by any third party is strictly prohibited. The material in it reflects Stantec’s professional judgment in light of the scope, schedule and other limitations stated in the document and in the contract between Stantec and the Client. The opinions in the document are based on conditions and information existing at the time the document was published and do not take into account any subsequent changes. In preparing the document, Stantec did not verify information supplied to it by others. Any use which a third party makes of this document is the responsibility of such third party. Such third party agrees that Stantec shall not be responsible for costs or damages of any kind, if any, suffered by it or any other third party as a result of decisions made or actions taken based on this document.

Prepared by (signature)

Bill Krawchuk, MNRM, MCIP, RPP

Reviewed by (signature)

Stephen Biswanger, P.Eng.

Approved by (signature)

Carmen Anseeuw, M.Env.


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Table of Contents

EXECUTIVE SUMMARY ............................................................................................................ I

1.0 INTRODUCTION .......................................................................................................... 1.1 1.1 BACKGROUND ............................................................................................................ 1.1

1.1.1 Previous Studies and Activities ................................................................... 1.2 1.2 THE PROPONENT ....................................................................................................... 1.2 1.3 LAND OWNERSHIP AND PROPERTY RIGHTS .......................................................... 1.2 1.4 APPROVALS AND LICENCES .................................................................................... 1.3 1.5 PUBLIC ENGAGEMENT .............................................................................................. 1.4 1.6 FUNDING ..................................................................................................................... 1.4

2.0 PROJECT DESCRIPTION ........................................................................................... 2.1 2.1 PROPOSED DEVELOPMENT ..................................................................................... 2.1

2.1.1 Major Components and Activities ................................................................ 2.2 2.1.2 Construction Inputs and Outputs ................................................................. 2.4 2.1.3 Operation Inputs and Outputs ..................................................................... 2.4 2.1.4 Workforce.................................................................................................... 2.5 2.1.5 Health and Safety ........................................................................................ 2.5 2.1.6 Water Conservation Report ......................................................................... 2.6 2.1.7 Project Schedule ......................................................................................... 2.6

3.0 SCOPE OF THE ASSESSMENT ................................................................................. 3.1 3.1 SPATIAL AND TEMPORAL BOUNDARIES ................................................................. 3.1

4.0 DESCRIPTION OF EXISTING ENVIRONMENT .......................................................... 4.1 4.1 BIOPHYSICAL ENVIRONMENT .................................................................................. 4.1

4.1.1 Climate ........................................................................................................ 4.1 4.1.2 Soils and Terrain ......................................................................................... 4.1 4.1.3 Vegetation ................................................................................................... 4.2 4.1.4 Groundwater Resources ............................................................................. 4.2 4.1.5 Surface Water Resources ........................................................................... 4.2 4.1.6 Fish and Fish Habitat .................................................................................. 4.3 4.1.7 Wildlife and Wildlife Habitat ......................................................................... 4.4 4.1.8 Species of Concern ..................................................................................... 4.5

4.2 SOCIO-ECONOMIC ENVIRONMENT .......................................................................... 4.7 4.2.1 Population ................................................................................................... 4.7 4.2.2 Indigenous Communities ............................................................................. 4.7 4.2.3 Infrastructure and Services ......................................................................... 4.7 4.2.4 Land and Resource Use .............................................................................. 4.8 4.2.5 Heritage Resources .................................................................................... 4.8 4.2.6 Human Health and Well-being ..................................................................... 4.9

5.0 ASSESSMENT APPROACH ....................................................................................... 5.1 5.1 PROJECT INTERACTIONS AND VALUED COMPONENTS ....................................... 5.1


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5.1.1 Selection of Project Interactions and Valued Components .......................... 5.1 5.2 RESIDUAL EFFECTS CRITERIA ................................................................................. 5.3

6.0 PROJECT ENVIRONMENTAL EFFECTS ................................................................... 6.1 6.1 BIOPHYSICAL ENVIRONMENT .................................................................................. 6.1

6.1.1 Atmosphere ................................................................................................. 6.1 6.1.2 Soils and Vegetation ................................................................................... 6.2 6.1.3 Groundwater ............................................................................................... 6.4 6.1.4 Surface Water ............................................................................................. 6.5 6.1.5 Fish and Fish Habitat .................................................................................. 6.7 6.1.6 Wildlife and Wildlife Habitat ......................................................................... 6.8

6.2 SOCIO-ECONOMIC ENVIRONMENT ........................................................................ 6.10 6.2.1 Socio-economic Components .................................................................... 6.10 6.2.2 Heritage Resources .................................................................................. 6.11

7.0 ACCIDENTS AND MALFUNCTIONS........................................................................... 7.1 7.1 GENERAL HEALTH AND SAFETY .............................................................................. 7.1 7.2 SCENARIOS ................................................................................................................ 7.1

7.2.1 Fire/Explosion ............................................................................................. 7.1 7.2.2 Spills ........................................................................................................... 7.1 7.2.3 Transportation Accidents ............................................................................. 7.2 7.2.4 Summary..................................................................................................... 7.4

8.0 FOLLOW-UP, MONITORING AND REPORTING ........................................................ 8.1

9.0 CONCLUSION ............................................................................................................. 9.1

10.0 REFERENCES ........................................................................................................... 10.1 10.1 LITERATURE CITED ................................................................................................. 10.1 10.2 PERSONAL COMMUNICATION ................................................................................ 10.3

LIST OF TABLES Table 2-1 GCDWQ/DWSA and Design Parameters .......................................................... 2.1 Table 2-2 Design and Construction Schedule ................................................................... 2.6 Table 4-1 Climate Normals for Gillam Airport, Manitoba (1981-2010) ............................... 4.1 Table 4-2 Historical Water Quality Data Stephens Lake .................................................... 4.3 Table 4-3 Species of Conservation Concern with the Potential to Occur in the RAA ......... 4.6 Table 5-1 Designation of Valued Components .................................................................. 5.2 Table 5-2 Definition of Terms Used to Characterize Residual Environmental Effects ........ 5.3

LIST OF APPENDICES

APPENDIX A FIGURES ................................................................................................... A.1

APPENDIX B PLAN, AGREEMENTS, FLCN CORRESPONDENCE ............................... B.1

APPENDIX C EQUIPMENT SPECIFICATION ................................................................. C.1


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APPENDIX D WATER CONSERVATION REPORT ......................................................... D.1

APPENDIX E DFO REQUEST FOR REVIEW .................................................................. E.1

APPENDIX F HERITAGE CORRESPONDENCE ............................................................ F.1


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Executive Summary

The Town of Gillam is seeking an Environment Act Licence for a new water treatment plant (WTP), utilizing a surface water source, Stephens Lake, to supply potable water to the town. The new WTP will utilize the following proposed treatment process – Dissolved Air Flotation (DAF), filtration, pH adjustment, chlorination, UV disinfection and fluoridation. Two intake water pipelines are to be provided, each with a chemical line with sodium hypochlorite for aquatic invasive species zebra mussel control if required in future. The treatment process will generate filter-to-waste water which be discharged via a buried low-pressure sewer (LPS) to the existing wastewater treatment plant. Wastewater from the centrifuge, filter backwash and sanitary building services will also be discharged to the LPS.

This Environment Act Proposal has been prepared by Stantec Consulting Ltd. on behalf of the Town of Gillam and PCL Construction in accordance with Manitoba Sustainable Development’s Information Bulletin, “Environment Act Proposal Report Guidelines” March 2018 and Information Bulletin – Environment Act Proposals for Municipal Water Supply Systems – Supplementary Guidelines and Information Bulletin – Water Efficiency Plans for Towns and Municipalities. This EAP documents the proposed construction, potential environmental effects and planned mitigation measures associated with the facility’s operation. The report is submitted as supporting information to the Environment Act Proposal Form for licensing consideration by Manitoba Conservation and Climate (MCC [formerly Manitoba Sustainable Development]) for water treatment plant construction and operation.

Potential environmental effects of the Project during the construction and operation and maintenance phases are considered routine activities and are similarly well understood (i.e., related to short-term construction noise, traffic, some air emissions, continual filter-to-waste water generation, and other wastewater generation). The proposed DAF treatment process for the water treatment plant is an established treatment system with numerous similar installations in Manitoba and the processes are well known. The water treatment plant Project will result in an improvement to the water supply to meet firm capacity daily requirements related to water quality and quantity for the town.

The proponent is committed to following mitigation measures to reduce the potential effects to the environment during the Project. The likelihood of fire/explosion, spills, and transportation accidents occurring as a result of the Project is limited given the implementation of mitigation measures and safe work practices.

On the basis of the desktop studies undertaken, site observations and information available to date as presented in this report, the Project is expected to create no significant adverse effects to the biophysical and socio-economic environment.


Introduction

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1.0 INTRODUCTION

1.1 BACKGROUND

The Town of Gillam (the Town) is located approximately 1,064 kilometres northeast of the City of Winnipeg. The Town of Gillam’s existing water treatment plant (WTP) was constructed in 1968 and last underwent a major upgrade in 1997. The current process includes a dual train chemically assisted coagulation / flocculation / dissolved air floatation (DAF) process followed by filtration, chlorine disinfection, fluoridation, and pH adjustment. The primary source of water for the current WTP is Stephens Lake. A secondary back-up source is provided by the Kettle River. The current treatment capacity at the existing WTP is rated for a firm flow rate of 1,875 m3/day (Birchtree Consulting Ltd. 2016). There is also a lack of reservoir capacity at the existing WTP. The current and projected demands to the distribution system (i.e., maximum daily demand) are 2,200 m3/day for the year 2020 and 2,500 m3/day for 2040 (Town of Gillam 2019). The capacity of the existing WTP can no longer meet the maximum daily supply demands of the Town and has experienced challenges in meeting turbidity criteria. Recent filter media replacement and operational improvements at the existing WTP has addressed the provincial turbidity standard. However, there is insufficient space to expand the existing WTP at its current location to provide additional capacity; it was therefore concluded that a new WTP would be constructed at a new location. The existing WTP has also been damaged from two separate fires inside the plant in the last few years. The proposed construction of the WTP is planned to proceed as a design/build project. The existing WTP along with the existing pump house and existing water intake will be taken off-line when the new WTP is commissioned.

The Town of Gillam is seeking an Environment Act Licence for a new WTP to a maximum daily demand of 2,500 m3/day (2040), utilizing a surface water source (Stephens Lake), and to supply potable water to the Town. The water treatment plant is expected to be considered a Class 2 development pursuant to Section 3(9) of the Classes of Development Regulation, Man. Reg. 164/88 of The Environment Act, C.C.S.M. c. E125. This classification is based on the anticipated rate of water withdrawal volume and flow rate.

This Environment Act Proposal (EAP) has been prepared by Stantec Consulting Ltd. (Stantec), on behalf of the Town of Gillam and PCL Construction, in accordance with Manitoba Sustainable Development’s (MSD’s) Information Bulletin, “Environment Act Proposal Report Guidelines” March 2018 and MSDs Information Bulletin – Environment Act Proposals for Municipal Water Supply Systems – Supplementary Guidelines and Information Bulletin – Water Efficiency Plans for Towns and Municipalities. This report documents the potential environmental effects, and planned mitigation measures associated with the construction, operation and decommissioning of the proposed facility. The EAP report is submitted as supporting information to the Environment Act Proposal Form for licensing consideration by Manitoba Conservation and Climate (MCC [formerly MSD]) for facility operation.


Introduction

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1.1.1 Previous Studies and Activities

The general requirements for the project are defined in the “Owner’s Statement of Requirements” (Town of Gillam, 2019). The document “Design Build Services Technical Proposal” (PCL et al, 2020) defines and sizes the key components of the proposed WTP including establishing the design basis for structural, architectural, building mechanical, electrical, instrumentation and controls and site services components. The Design Build Services Technical Proposal provides the basis for the WTP and submission of this EAP. Additional studies were completed for the proposed WTP including: a compilation of raw water quality characteristics for Stephens Lake; a compilation of historical treated water quality characteristics from the existing WTP; a re-assessment of the Town of Gillam’s existing WTP; a geotechnical investigation at the proposed WTP Project site; and a desktop study describing the aquatic environment at the Project site.

1.2 THE PROPONENT

For the purposes of development licensing, the proponent is the Town of Gillam. For further information regarding the Town of Gillam WTP, please contact the following:

Mr. Tom Zelenesky, Interim CAO P.O. Box 100 323 Railway Avenue Gillam, MB R0B 0L0 Telephone: (204) 652-3150 Email: [email protected]

This Environment Act Proposal was prepared by Stantec Consulting Ltd. The local contact is:

Mrs. Carmen Anseeuw, M.Env. Project Manager, Environmental Planner Stantec Consulting Ltd. 500-311 Portage Avenue Winnipeg, MB R3B 2B9 Telephone: (204) 928-8809 Email: [email protected]

1.3 LAND OWNERSHIP AND PROPERTY RIGHTS

The plant site covers approximately 893 m2 (36.0 m by 24.8 m) within a total area of 5.8 ha (approx.), with an access road located to the west (see Appendix A, Figure 1-1a). The proposed WTP site and intake pipeline route is a mixture of undeveloped and previously disturbed land (with roads) as well as open to densely forested cover between the site and the lake (see Appendix A, Figure 1-1b).

The proposed WTP is located on land within the Town of Gillam. The WTP site is located on land owned by the Province of Manitoba and administered locally by the Town of Gillam. The Town has entered into an agreement to purchase the land from the Crown. The sale agreement will not be finalized until the plant is constructed (see Appendix B). The legal plan for the subject property (consisting of the proposed WTP and intake pipelines) is described as part Parcel 4, Plan 5407 NLTO and parts of unsurveyed

mailto:[email protected]

mailto:[email protected]


Introduction


territory in NE9-85-18E, NW10-85-18E, and SW15-85-18E. A proposed dual water intake pipeline will extend approximately 300 m from shore into Stephens Lake and will be located on land within Manitoba Hydro’s Nelson River Water-Power Reserve. The Nelson River Water Power Reserve will need to be removed from the proposed Project footprint, including water intake pipelines, in the vicinity of Stephens Lake. The Design-Build Owner will contact the Water Power Licensing Section at MCC concerning the procedure to effect removal of the Reserve under Section 7 of The Water Power Act.

A copy of the proposed Plan of Subdivision for the subject property for the new WTP and the proposed water intake pipelines is included in Appendix B. Ownership of the mineral rights beneath the land is expected to rest with the Crown (Province of Manitoba).

Existing and adjacent land use consists of the airport and supporting infrastructure and facilities, Provincial Road (PR) 280, and Crown land. The townsite of Gillam is located approximately 645 m south of the proposed WTP site.

The Gillam Airport and proposed WTP and intake and discharge pipeline route are located within the Town of Gillam. Under the Town of Gillam Development Plan By-law No. 715-2012, the airport and surrounding lands are designated as “Community Area” which indicates what type of developments are allowed related to a primary service centre for the municipality, with full municipal servicing including water. Plan policies also encourage the upgrade and relocation of the existing water treatment plant to an area outside the central business area (Town of Gillam 2012). Under the Town of Gillam Zoning By-law No. 732.2014, the WTP lands and the intake and discharge pipeline route are zoned as “LD – Limited Development Zone”. A major utility facility, meaning those facilities entailing the construction of new buildings, and that may have employees located at the site, is a permitted use in the LD zone. Public utilities are services and facilities that include the transmission of water to the public at large, including systems, works, plant equipment or services (Town of Gillam 2014).

1.4 APPROVALS AND LICENCES

The following is an overview of the regulatory approvals and licenses pertinent to the construction and operation of the proposed Town of Gillam WTP and regulations considered in this assessment.

• The Drinking Water Safety Act – the owner will be required to submit an application to the Office of Drinking Water (ODW) for a permit to construct prior to proceeding with construction.

• The Water Power Act – procedure to effect the removal of the Project’s footprint from the Nelson River Water Power Reserve under Section 7 of the Act – Manitoba Conservation and Climate, Water Power Licensing Section.

• The Water Rights Act – water rights licence application for the withdrawal of water from the Nelson River (Stephens Lake) and the construction of water control works (i.e., intake pipelines) for the conveyance of water – Manitoba Conservation and Climate, Environmental Stewardship Division.


Introduction


The Town currently has a Water Rights Licence for 40L/s for the existing WTP intake, which is located directly adjacent to the location for the proposed intakes. The existing water intake and pump house will be abandoned once the new intakes are in place.

• The Highways Protection Act – permit application to Manitoba Infrastructure for placement of a structure (i.e., pipelines, sewer) within controlled areas (i.e., 38 m control line from the edge of the rights-of-way), including provincial roads.

• Fisheries Act (federal) – as two water intake pipelines will withdraw water from Stephens Lake, the Fisheries Act requires that the potential for serious harm to fish and fish habitat as defined under the Act be considered. The Project necessitated submission of a Request for Review (RFR) to the Department of Fisheries and Oceans Canada (DFO) as per the requirements of the Act (see Appendix E).

Other permits and approvals likely required include MCC Crown Land Work Permit, Bell MTS and Manitoba Hydro for crossing utility locations, and Office of the Fire Commissioner for construction permits.

1.5 PUBLIC ENGAGEMENT

The proposed WTP is to be located on land within the Town of Gillam that is appropriately zoned for public utility use. No formal public engagement is planned beyond the placement of the EAP on the public registry for public review and comment by MCC.

1.6 FUNDING

The Town of Gillam, through Manitoba Hydro, will provide funding for all undertakings related to the Project.


Project Description


2.0 PROJECT DESCRIPTION

2.1 PROPOSED DEVELOPMENT

The proposed development consists of the construction of a WTP facility (including raw water pump station, treatment process, reservoir, distribution system, and truck fill) and water intake lines along with a new access road, driveway, and parking lot. The existing water intake line and pump house for the existing WTP will be taken offline and abandoned once the new water intake lines are in place. The WTP plant site covers approximately 893 m2 (36.0 m by 24.8 m) within a total area of 5.8 ha (see Appendix A, Figure 1-2). Proposed treated water supply and recirculation lines and a LPS line will connect from the WTP to the townsite along Rudy Gaider Senior Drive and Airport Road. In addition, a recirculation monitoring building will be constructed on Public Reserve land across the street from the existing WTP. A site plan showing the proposed development and associated works is shown in Appendix A, Figures 1-3 and 1-4. As noted previously, the proposed construction of the WTP is proceeding as a design/build project.

The proposed WTP design is based on a 20-year demand forecast. The projected 20-year average potable water demand is 1,000 m3/day (365,000 m3/year), with a maximum daily water demand of 2,500 m3/day. The peak design flow is 3,750 m3/day, resulting in a peak WTP capacity of 33.4 L/s. The treatment plant will operate year-round, 24 hours per day. The useful reservoir capacity for the Project is 2,369 m3 (2,369,000 litres). The raw water source for the proposed WTP is surface water from Stephens Lake.

Key water quality objectives are summarized in Table 2-1 below.

Table 2-1 GCDWQ/DWSA and Design Parameters

Parameter GCDWQ/DWSA Design Criteria Alkalinity n/a 77 to 151 mg/L

Aluminum <0.1* mg/L OG 0.27 to 1.0 mg/L

Bromide n/a 0.1 mg/L

Hardness < 200 / 500 mg/L (AO) 125 to 150 mg/L

Iron ≤ 0.3 mg/L (AO) 0.29 to 1.3 mg/L

Manganese ≤ 0.05 mg/L (AO) 0.02 mg/L

pH 7 to 10 (AO) 7.1 to 8.7

Total Organic Carbon n/a 6.6 to 10.3 mg/L

Dissolved Organic Carbon n/a 6.2 to 10.8 mg/L

Total Dissolved Solids ≤500 mg/L (AO) 142 to 242 mg/L

True Colour ≤ 15 TCU (AO) 35 TCU

Turbidity ≤ 0.1 NTUa 3.2 to 67 NTU

Temperature ≤15° C 0 to 18° C


Project Description


Table 2-1 GCDWQ/DWSA and Design Parameters

Parameter GCDWQ/DWSA Design Criteria Notes: MAC = Maximum Acceptable Concentration; AO = Aesthetic Objective; OG = Operational Guideline GCDWQ – Guidelines for Canadian Drinking Water Quality DWSA – Drinking Water Safety Act * Conventional treatment types a Turbidity limits for surface water vary with the treatment process as follows: chemically assisted filtration ≤ 0.3 NTU 95% of time, never to exceed 1 NTU; slow sand filtration or diatomaceous earth filtration ≤ 1 NTU 95% of time, never to exceed 3 NTU; membrane filtration ≤ 0.1 NTU 95% of time, never to exceed 0.3 NTU.

2.1.1 Major Components and Activities

Raw Water Source

The proposed raw water supply will be Stephens Lake located approximately 165 m to the northeast of the proposed WTP site. A dual 300 mm diameter high density polyethylene (HDPE) pipeline will be installed 2.5 m (minimum) below ground (maximum at 5 m) to convey raw water from the lake to the northeast side of the WTP (see Figure 1-3). Stephens Lake is subject to occasional blue-green algae outbreaks. The WTP and water intake will be designed to account for blue-green algae blooms and aquatic invasive species zebra mussels in the water source (PCL et al. 2020).

Water Intake Pipelines

The proposed water intake system will consist of two 300 mm diameter HDPE intake pipelines (one duty, one standby) installed via directional drilling from the shore. The water intake lines will be installed beneath the lakebed and will daylight in the lake approximately 130 m from the shoreline (see Figure 1-3). The inlets to the HDPE pipelines will be screened and covered by 300 mm of 25 mm clean stone, 30 mm of pea gravel and 300 mm of sand pack. Both intake lines will supply raw water via pumps to a pump house at the proposed WTP for treatment prior to distribution. The intake lines will include backwash provisions to dislodge fine suspended matter that has settled in the media layers. Each line will be approximately 300 m long and will be installed at a maximum elevation of 133 masl. Each line will also include a 25 mm pipe installed in the intake pipe that could be used in the future to inject sodium hypochlorite to mitigate against zebra mussels.

General Process

The proposed WTP will utilize the following treatment process – coagulation, flocculation and DAF, filtration, pH adjustment, chlorination, UV disinfection and fluoridation of raw water from Stephens Lake. Two intake structures (i.e., pipelines) will be constructed to convey raw water from the lake to the raw water pumps. Two coagulation rapid mix tanks (one duty/one stand-by) with a maximum flow rate of 33.4 L/s will mix chemicals to the raw water prior to transfer to two flocculation tanks (one duty/one stand-by). Two DAF treatment trains will be installed (one duty/one stand-by), each capable of treating the maximum day flow plus any wastage amount. Following the DAFs, four filtration units (three duty/one stand-by) will be provided utilizing an anthracite and sand filtration media to filter the water prior to disinfection via two UV disinfection units (one duty/one stand-by) capable of handling the maximum day flow plus any


Project Description


wastage amount (PCL et al. 2020). The water will be disinfected using sodium hypochlorite prior to entering the reservoir and additional sodium hypochlorite will be added as required prior to entering the distribution system along with fluoridation chemical.

Filter-to-waste water, backwash waste, centrifuge centrate and DAF float (if the centrifuge is out of service) are the process waste streams that will be discharged to the wastewater treatment plant via a new LPS line along with the WTP building sanitary wastewater. The proposed WTP will generate filter-to-waste discharge water at approximately 11.6 L/s per day for up to 10 minutes per filter (or 28 m3/d). The filter-to-waste water is water that has received treatment through coagulation-flocculation and DAF followed by granular filtration but does not meet the turbidity requirements of the Town’s distribution system. The turbidity of the filter-to-waste water is expected to range from 10 NTU to approx. 0.3 NTU.

Water Treatment Plant (WTP) Building

The proposed WTP consists of a pre-engineered, clear span, rigid steel frame building constructed on top of the reservoir/wet well roof and adjacent to tankage. The building will be designed for future expansion on one side of the building. The reservoir/wet well structures will be constructed of underground cast-in-place concrete. The reservoir will consist of two cells with a concrete divider wall and concrete baffle walls. The wet well will consist of two cells with a concrete divider. The WTP will include a raw water pumping room, a process room that houses the treatment equipment and distribution pumps, dedicated chemical storage rooms for acids, bases and salts, and a sludge loading truck bay to store the dewatered DAF sludge. In addition, there will be an electrical room, compressor room, office/control room, laboratory, supervisor office, workshop, truck fill vestibule, laundry area, locker rooms, washroom, and shower rooms. A new access road, driveway, and parking lot will be added to the site. The Project also includes a back-up diesel-fueled generator to provide back-up power supply for powering key elements in plant operation. The generator and associated tank will be located outside of the WTP.

Recirculation Monitoring Building

A recirculation monitoring building (RCMB) is proposed to be added for the Project and will be located outside the existing downtown WTP. The building will be a clear span, slab-on-grade, pre-engineered steel structure sized to accommodate required piping, valves and equipment. The existing supply and return lines now connected to the existing WTP will be disconnected and connected to the RCMB with the proposed water supply and return lines.

Water Distribution and Sewer System

Two 300 mm diameter insulated HDPE water distribution lines (supply and recirculation) will be installed over a length of approximately 1.5 km between the new WTP and a point on the existing water distribution system at the intersection of Churchill Place and Gillam Drive at a depth of 1.5 m below ground surface. The preferred method of installation is by trenchless technology; however, curb stop interferences will be considered. The new distribution lines will serve the airport and one residence along Rudy Gaider Senior Drive. The watermain crossing underneath of PR 280 will be sleeved as per Manitoba Infrastructure specifications (see Figure 1-2). A new fire hydrant will be installed at the proposed WTP for fire protection.


Project Description


A 1.5 km (approximately) insulated HDPE LPS line will be installed at a minimum depth of 2.7 m below the ground surface. The LPS will service the new WTP, the airport and one residence along Rudy Gaider Senior Drive and will be sleeved at the crossing of PR 280 according to Manitoba Infrastructure specifications (see Figure 1-2). A small lift station in the WTP yard will be provided for the plant’s plumbing system (i.e., toilets, shower, sinks). This will be separated at an appropriate distance from the treated water cells and water lines for the WTP.

2.1.2 Construction Inputs and Outputs

During the construction phase of the proposed WTP, materials required may include concrete, steel, rebar, field-survey tape, paint spray cans, drywall, flooring, gravel, fill, fuel and other materials. Raw materials such as gravel, water, and fill will also be required for site works. Most of these materials will be brought to the site from other areas. There may be temporary storage of construction materials in lay-down areas on the site. At peak construction, it is estimated that approximately 30 to 35 construction staff will be involved in the Project works for the WTP. Equipment utilized on-site will be typical for construction, including cranes, loaders, etc.

Outputs during construction can include surface runoff and fugitive dust and vehicle emissions from construction equipment. Other outputs generated from construction work related to spent packaging materials, solvents, used oils, surplus building materials, etc., will be regularly transported off the site and disposed of or recycled according to applicable regulations.

It is anticipated that large quantities of fuel will not be stored on-site at any given time. Fuel for construction equipment will be supplied by fueling trucks that are regulated under The Storage and Handling of Petroleum Products and Allied Products Regulation. Records of fuel volumes and an Emergency Response Plan that includes spill avoidance, notification and response will be implemented as a part of the construction specifications and enforced at the site. No fueling or servicing activities will be permitted within 100 m of Stephens Lake. Hazardous substances stored outdoors and indoors will be situated in or on secondary containment capable of containing 1.5 times the quantity of the total stored in or on it in the event of a leak. Storage sites will be consolidated to the extent possible to reduce the number of such sites.

2.1.3 Operation Inputs and Outputs

2.1.3.1 Chemical Storage and Usage

Chemicals used as part of the water treatment process include aluminum sulfate (alum), polymers (polyelectrolytes), sodium hypochlorite, sodium hydroxide, and fluorosilicic acid. Chemical storage at the proposed WTP will include an aboveground double-walled alum storage tank (22,000 L minimum) located in the Alum Room. Polymers will be stored in the salts room with the alum in a 200 L drum situated on top of an aboveground spill deck. Sodium hypochlorite is to be stored in at least three totes located in the chemical room. The chemical room will also include an eight-month supply of sodium hydroxide consisting of six totes. Fluorosilicic acid will be stored in two totes in a separate room. Secondary


Project Description


containment will be provided for all tote storage. Chemical feed skids will be provided for sodium hypochlorite, alum solution, sodium hydroxide, and fluoride.

2.1.3.2 DAF Sludge Treatment and Waste Management

The WTP will generate DAF sludge at a rate of 4-12 m3/day (1,059 to 3,176 gallons per day [gpd]) as part of the water treatment process. The DAF sludge solids concentration is expected to range from 1-3% total solids. The DAF sludge is dewatered with a centrifuge and the resultant centrate will be discharged to a process waste tank from where it will be pumped to the wastewater treatment plant via the LPS. The dewatered sludge will then be conveyed to a trailer for subsequent transport and landfill disposal. The trailer will have capacity for holding dewatered sludge for a minimum of three days of sludge production. The dewatered sludge will have a total solids concentration greater than 25%.

Domestic waste and recyclables are expected to be generated during operations with the proposed WTP. Domestic sewage, process wastewater from the DAF and filters, and centrate from the centrifuge will be discharged to the LPS via a small lift station.

2.1.3.3 Storage of Gasoline or Associated Products

Electrical power for plant operation will be provided to the site by Manitoba Hydro. A diesel-fueled generator will be used as a back-up power supply for powering key elements in plant operation. Fuel storage for the back-up generator will consist of an on-board aboveground diesel tank of approximately 29,000 L (7,660 gallon) capacity, sized for 48 hours of run time (Appendix C). The generator and associated tank will be located outside of the WTP and will meet provincial fuel storage requirements.

2.1.4 Workforce

The size of the peak construction workforce for the proposed WTP is expected to be approximately 30 to 35 workers. The projected WTP operation working complement is anticipated to be four staff maximum.

2.1.5 Health and Safety

The Town of Gillam is committed to health and safety for the Gillam WTP and associated works Project (PCL et al. 2020). The Design/Build Contractor will be required to prepare and submit a site Health and Safety Plan that meets the requirements of The Workplace Safety and Health Act. The plan will include information on: hazard/risk assessment practices and procedures; results of site-specific safety hazard assessment; results of safety and health risk or hazard analysis for site tasks and operation; planned site safety inspections; safety protocols to be enacted on-site during performance of work; accident/incident investigation procedures; and emergency response plan and procedures. The Design/Build Contractor will also be required to submit copies of reports or directions issued by the Province, copies of incident and accident reports, and Workplace Hazardous Materials Information System (WHMIS) Material Safety Data Sheets (MSDSs) as required.

Construction safety measures of the National Building Code 2015 Part 8, The Workplace Safety and Health Act, Workers Compensation Board, and the Design/Builder’s COR Safety Program will also be


Project Description


observed. Appropriate fire protection equipment and measures will be maintained on-site during the performance of site work, as required by local municipal codes, regulations and by-laws. Burning of rubbish and construction waste materials will not be permitted on-site. In addition, portable fire extinguishers are to be provided adjacent to areas of cutting or welding operations and areas where combustibles are stored in conformance with Part 6 of the Manitoba Fire Code (Town of Gillam 2019).

Finally, the Design/Build Contractor will have safety measures in place to address issues surrounding the current COVID-19 global pandemic. Guidelines supplied by the Centers for Disease Control and Prevention, Health Canada, and the World Health Organization will be followed. Along with these guidelines, the Design/Build Contractor will undertake additional precautions to protect workers on project sites (PCL Construction 2020). The PCL Winnipeg District/Northern Ontario have prepared HSE Field Meeting Safety Talks on what workers need to know about COVID-19 and how to reduce the spread of the virus (PCL Winnipeg District/Northern Ontario 2020a, b).

Once the Project is constructed and commissioned a site health and safety program will be developed and implemented by the Town of Gillam for WTP operation.

2.1.6 Water Conservation Report

The Town of Gillam has prepared a Water Conservation Report for the Gillam Water Treatment Plant in accordance with the Manitoba Sustainable Development Information Bulletin – Environment Act Proposals for Municipal Water Supply Systems – Supplementary Guidelines and Information Bulletin – Water Efficiency Plans for Towns and Municipalities. The Report as presented in Appendix D outlines current and planned conservation measures, public awareness and public involvement strategies, and an implementation schedule.

2.1.7 Project Schedule

The proposed WTP requires funding approval prior to proceeding to the design-build stage. A preliminary Project implementation schedule is provided in Table 2-2.

Table 2-2 Design and Construction Schedule Design Development Activity Stage Date

Permits and Approvals Submit Environment Act Proposal April 2020 Submit Phase 1 Permit to Construct to ODW (65% drawings and Design Brief)

May 2020

Receive Environment Act Licence June 2020 Receive Conditional Approval from ODW June 2020 Submit Phase 2 Permit to Construct to ODW (Sealed Drawings)

October 2020

Receive Permit to Construct from ODW October 2020 Design and Construction (Estimated)

Complete Detailed Design October 2020

Procurement March 2020-April 2021 Construction Contract Start-End July 2020-October 2021 Commissioning of WTP October 2021


Scope of the Assessment


3.0 SCOPE OF THE ASSESSMENT

3.1 SPATIAL AND TEMPORAL BOUNDARIES

The proposed Gillam WTP and associated works, including the WTP and intake and discharge pipelines, and associated potable water and sewer system connections, (the Project) is to be located south of the Gillam Airport and will withdraw water from Stephens Lake. The new recirculation building will be located within the Town across from the existing WTP. For the purposes of this environmental assessment, the Project Development Area, Local Assessment Area and Regional Assessment Area are defined as follows:

• Project Development Area (PDA) – the physical footprint of the Project comprises the WTP (893 m2) and the water intake pipeline route (approx. 300 m), the dual water intake pipelines, the water distribution and LPS systems, and the recirculation building within the lands they occupy, defined as being within part Parcel 4, Plan 5704 PLTO, and across parts of unsurveyed territory in the Town of Gillam on Provincial Crown land in Sections NE9, NW10, and SW15, Township 85, Range 18 EPM.

• Local Assessment Area (LAA) – area up to a two km radius from the Project site. For the purposes of the assessment, the LAA is the area over which potential direct effects of the Project are expected to occur (see Figure 1-5).

• Regional Assessment Area (RAA) – area up to a ten km radius from the Project site. For the purposes of the assessment, the RAA represents the area that establishes the context for determining the significance of potential project effects (see Figure 1-5).

For the purposes of this assessment, the following temporal boundaries are defined:

• Construction phase – a period of approximately 16 months from July 2020 to October 2021 over which construction will occur. Pre-construction clearing took place on-site in April 2020 to prior to the breeding bird window for migratory birds.

• Operation phase – the period over which the facility will be in operation, at least 20 years.

• Decommissioning phase – there are currently no decommissioning plans for the facility. If and when decommissioning occurs at some point in the future, it would be anticipated to consist of the removal of WTP buildings and equipment from the site and capping of the intake and discharge pipes. Decommissioning would be conducted according to Licence conditions and regulatory requirements at the time. Decommissioning of the existing WTP is not included in the scope of the proposed Project.


Description of Existing Environment


4.0 DESCRIPTION OF EXISTING ENVIRONMENT

4.1 BIOPHYSICAL ENVIRONMENT

4.1.1 Climate

The Project area lies within a colder subdivision of the High Boreal Ecoclimatic Region in Manitoba. The climate is characteristic of short, cool summers and long, very cold winters (Smith et al. 1998). The mean annual temperature is approximately -4.1 °C. The average growing season is 131 days (Smith et al. 1998). The mean annual precipitation is approximately 500 mm, of which slightly more than one-third falls as snow. Precipitation varies greatly from year to year and is highest in the summer months (Smith et al. 1998). Monthly climate normal data for the Gillam Airport are provided in Table 4-1.

Table 4-1 Climate Normals for Gillam Airport, Manitoba (1981-2010)

Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yr

Temperature (°C)

Daily Avg. -24.4 -21.7 -14.6 -4.4 3.9 11.6 15.8 14.4 7.9 0.0 -11.6 -21.4 -3.7

Daily Max. -19.7 -16.0 -7.9 1.9 9.9 18.0 21.8 20.0 12.4 3.6 -7.6 -16.9 1.6

Daily Min. -29.0 -27.3 -21.2 -10.6 -2.2 5.1 9.7 8.7 3.3 -3.5 -15.5 -25.9 -9.0

Precipitation

Rainfall (mm) 0.0 0.0 0.9 3.8 28.8 54.0 78.6 76.1 53.0 19.0 1.0 0.1 315.3

Snowfall (cm) 25.2 24.6 27.6 22.1 15.7 2.1 0.0 0.0 4.6 26.2 44.2 28.9 221.2

Total (mm) 19.6 19.0 22.7 21.7 42.6 55.8 78.6 76.1 56.8 42.2 38.0 23.3 496.4

Source: Environment and Climate Change Canada 2019a

4.1.2 Soils and Terrain

The Town of Gillam WTP facility is located in the Knee Lake Ecodistrict in the Hayes River Upland Ecoregion of the Boreal Shield Ecozone. The Knee Lake Ecodistrict extends from Knee Lake in the south to Stevenson Lake in the north (Smith et al. 1998).

The Knee Lake Ecodistrict is an undulating to ridged loamy morainal plain. Veneer bogs on gently sloping glaciolacustrine blankets and veneers, and drumlins on lower slopes are common throughout. Local areas of prominent, kettled fluvioglacial deposits (eskers) provide local relief. The dominant soils in the Knee Lake Ecodistrict are organic soils associated with widespread permafrost in peatlands, such as veneer and peat plateau bogs (Smith et al. 1998).

A Manitoba Hydro esker pit is located approximately six km from the Town of Gillam near the Radisson Converter Station.




4.1.3 Vegetation

The Hayes River Upland Ecoregion is characterized by a mosaic of mixedwood and coniferous forest stands and clearings. The dominant forest cover in the ecodistrict consists of black spruce stands, along with some jack pine and trembling aspen stands due to the frequency of forest fires (Smith et al. 1998). Other than areas for runways/taxiways, the townsite of Gillam and other clearings, the Project area (LAA) for the WTP site is heavily treed.

Lands within the LAA and RAA have been moderately modified by human development and support infrastructure (e.g., roads, transmission line ROW, and the Town of Gillam). The water treatment plant site and water intake pipeline route traverses a 5.7 ha stand of disturbed mature black spruce containing several cut lines and trails (see Appendix A). The route for the LPS and treated water distribution lines are primarily along disturbed road rights-of-way. The recirculation building will either be located on disturbed property across from the existing WTP on vacant cleared land (see Appendix A, Figure 1-2).

4.1.4 Groundwater Resources

The RAA consists of Precambrian bedrock of the Churchill/Superior geological provinces. The general bedrock geology is made up of mainly Granites and Granitoid Gneiss rock types. Within the bedrock, groundwater flow is expected to be restricted to fractures and joints. There have been very little to no intensive groundwater investigations in the Precambrian bedrock regime. Groundwater yields are expected to be marginal overall. Water quality is reported to be generally saline below 150 m (Betcher et al. 1995).

Little information exists on the extent of overburden sand and gravel deposits in the RAA. Few active water wells have been drilled in the Gillam area although there have been several test wells. The groundwater wells that have been advanced were for domestic and industrial water use, primarily for production purposes (Groundwater Information Network 2014).

Groundwater investigation undertaken at the PDA, involving three test holes, revealed a site stratigraphy of a thin layer of peat overlying alluvial silty sand to sandy silt and silty sand to sand silt till. Groundwater infiltration and sloughing was encountered in the lower silty sand to sandy silt and till during drilling. Groundwater levels are likely to fluctuate seasonally and following precipitation events. No evidence of permafrost was observed in the overburden soils during drilling (KGS Group 2019a).

4.1.5 Surface Water Resources

The PDA is located in the Burntwood River watershed. Many small, medium and large lakes are drained by the irregular bedrock-controlled network of rivers and streams. Drainage in the area is generally to the northeast (Smith et al. 1998).

The closest waterbody to the Project site is Stephens Lake, approximately 165 m to the northeast, a reservoir created by the Kettle Dam in 1971 and part of the Nelson River system. Stephens Lake is 32 km long and ultimately drains into Hudson Bay (approx. 150 km east). Stephens Lake has historically been used by the Town of Gillam as a raw drinking water source (Stantec 2020). Lake levels on Stephens Lake




are high year-round and are regulated by Manitoba Hydro as part of the Churchill River Diversion (CRD). As a result of the CRD, water quality in Stephens Lake at Gillam, experienced changes in nitrogen and phosphorous. Total phosphorous was generally above the Manitoba narrative nutrient guideline of 0.025 mg/L in lakes and reservoirs in the north and south of Stephens Lake. Chlorophyll concentrations in the mainstem area of Stephens Lake have been relatively similar since the 1970s and the CRD (Manitoba Hydro 2015). The lake has experienced an increase in nutrients and a reduction in pH following flooding. Total mercury in water was likely only marginally affected, while methylmercury in water increased following the CRD. Most metals have consistently remained within objectives and guidelines for the protection of aquatic life, except for aluminum and iron, which exceeded these guidelines for Stephens Lake. Overall, the water quality in Stephens Lake is deemed to provide suitable water quality for the protection of freshwater aquatic life (Manitoba Hydro 2015).

As mentioned earlier, Stephens Lake is subject to occasional blue-green algae outbreaks. The WTP and water intake is to be designed to account for blue-green algae blooms and zebra mussels in the water source (Town of Gillam 2019; PCL et al. 2020).

Historical water quality data from Stephens Lake is compared with surface water guidelines and objectives and design parameters in Table 4-2 (Town of Gillam 2019).

Table 4-2 Historical Water Quality Data Stephens Lake

Parameter Unit Stephens Lake

Historical Results Proposed Design Parameters AO

Minimum Maximum

Alkalinity (as CaCO3) mg/L 85.1 137 77-151

Aluminum mg/L 0.27 0.90 0.27-1.0 0.1a

Bromide mg/L <0.1 <0.1 0.1

Colour TCU 7 32 35

Hardness (as CaCO3) mg/L 125 138 125-150

Iron mg/L 0.29 1.15 0.29-1.3 0.3

Manganese mg/L 0.009 0.018 0.02 0.05

pH 7.1 8.7 7.1-8.7 6.5-8.5

Total Dissolved Solids mg/L 142 222 142-242 500

Total Organic Carbon mg/L 6.6 9.4 6.6-10.3

Dissolved Organic Carbon mg/L 6.2 9.8 6.2-10.8

Turbidity NTU 3.2 60.5 3.2-67.0

Temperature deg. C 0 18 0-18

4.1.6 Fish and Fish Habitat

Stephens Lake is a man-made reservoir in the LAA (approximately 245 m to the north of the WTP site), which drains to Hudson Bay to the east. The lake is home to 23 aquatic fish species, including: burbot




(Lota lota), cisco (Corgenous artedi), emerald shiner (Notropis atherinoides), lake chub (Couesius plumbeus), lake whitefish (Coregonus clupeaformis), longnose sucker (Catostomus catostomus), mooneye (Hiodon tergisus), northern pike (Esox Lucius), rainbow smelt (Osmerus mordax), sauger (Saner canadensis), slimy sculpin (Cottus cognatus), spottail shiner (Notropis hudsonius), trout-perch (Percopsis omiscomaycus), walleye (Sander vitreus), white sucker (Catostomus commersoni), and yellow perch (Perca flavenscens) (Keeyask Hydropower Limited Partnership 2012; North/South Consultants 2008). Spring (e.g., northern pike, walleye), summer (e.g., mooneye) and fall (e.g., lake whitefish) spawning fish are all present within Stephens Lake. Lake Sturgeon were identified in Stephens Lake; however, none have been captured near the WTP site. Although the Nelson River population of Lake Sturgeon is classified as Endangered under Committee on the Status of Endangered Wildlife in Canada (COSEWIC), no aquatic species at risk as listed under the Species at Risk Act are found in Stephens Lake (COSEWIC 2006; DFO 2019).

Within lower trophic levels, no species of conservation concern (i.e., phytoplankton, aquatic macrophytes, zooplankton, aquatic macroinvertebrates) have been identified in Stephens Lake (Keeyask Hydropower Limited Partnership 2012).

Stephens Lake is identified as part of the Nelson River Control Zone for aquatic invasive species control. It was established to prevent the introduction, and control the spread, of zebra mussels and spiny waterflea on the Nelson River system, including Stephens Lake (Manitoba Sustainable Development n.d.).

4.1.7 Wildlife and Wildlife Habitat

Located within the Hayes River Ecoregion, characteristic wildlife species consist of moose, caribou, black bear, wolf, lynx, beaver, muskrat, and snowshoe hare (Smith et al. 1998; WRCS MB Inc. 2012). Waterfowl including ducks, geese, pelicans, and other common bird species such as sandhill crane, spruce grouse, willow ptarmigan, raven, Canada jay and other passerine bird species are common in the region (Smith et al. 1998).

Approximately 178 bird species potentially breed or migrate through the larger region surrounding the Gillam area (Stantec 2012). Migratory birds and their nests are protected by the Migratory Birds Convention Act (MBCA). The sensitive breeding window for migratory birds inhabiting the Regional Assessment Area (RAA), which falls within zone C5, is April 20-August 29 (Environment and Climate Change Canada 2018).

Lands within the LAA and RAA have been moderately modified by human development and support infrastructure as noted previously (see Section 4.1.3). Terrestrial habitat encompassing the water treatment plant site and water intake pipeline route consists of disturbed mature black spruce tree cover (pers. comm. 2020a). The route for the LPS and treated water distribution lines are primarily along disturbed road rights-of-way. The recirculation building will either be located on disturbed property adjacent to the existing WTP or on vacant cleared land (see Appendix A, Figure 1-2).




4.1.8 Species of Concern

A request submitted to Manitoba Conservation Data Centre (MBCDC) for existing recorded observations of species of conservation concern indicated one such species in the LAA and RAA – yellow-banded bumble bee (MBCDC Coordinator pers. comm. 2020b). A search of the Manitoba Herps Atlas database found no records of amphibian species in the vicinity of Gillam. Five occurrences of amphibian species have been recorded at the west end of Stephens Lake – wood frog and boreal chorus frog (iNaturalist n.d.). These species are common in northern Manitoba. According to range maps, 15 species of conservation concern (SOCC) have the potential to occur within the RAA. A search of the Manitoba Herps Atlas (iNaturalist n.d.), Manitoba Conservation Data Centre (MBCDC 2020), and eBird (eBird 2019) revealed records of six SOCC that have been observed within the RAA (Table 4-4), including caribou. SOCC are those species listed under the federal Species at Risk Act, Manitoba’s The Endangered Species and Ecosystems Act (MSD 2017b), by COSEWIC, and/or those ranked as rare (i.e., S ranks 1, 2, and 3) by NatureServe Canada.

The desktop review indicated there are SOCC listed in Table 4-3 that exist in the RAA and may occur within the LAA. However, the disturbed nature of the PDA and immediate surrounding area (i.e., active airport), townsite of Gillam, and/or infrastructure (i.e., road and transmission line rights-of-way) are less likely to support SOCC such as caribou, for example, due to increased predation risk and avoidance. Presence of disturbance is known to reduce suitability of adjacent (>500 m) habitat for caribou (Environment Canada 2011).




Table 4-3 Species of Conservation Concern with the Potential to Occur in the RAA

Name Manitoba Status Federal Status Recorded

Observations in RAA Common Scientific

The Endangered Species and

Ecosystems Act NatureServe

Canada COSEWIC SARA

Great Blue Heron Ardea herodias - 5B - - -

Horned Grebe Podiceps auritus - 3 Special Concern Special Concern -

Common Nighthawk Chordeiles minor Threatened 3 Threatened Threatened (1) -

Canada Warbler Cardellina candensis Threatened 3B Threatened Threatened (1) -

Great Grey Owl Strix nebulosa - 4 Not at Risk Not at Risk

Willow Flycatcher Empidonax trallii - 3B - - -

Olive-sided Flycatcher Contopus cooperi Threatened 3 Threatened Threatened (1) -

Barn Swallow Hirundo rustica - 4B Threatened (2011) -

Rusty Blackbird Euphagus carolinus - 3 Special Concern Special Concern (1)

Ring-billed Gull Larus delawarensis - 5B - -

Woodland Caribou (Boreal) Rangifer tarandus caribou Threatened 2 Threatened Threatened (1)

Northern Leopard Frog Rana (Lithobates) pipiens - 4 Special Concern Special Concern (1) -

Red-sided Garter Snake Thamnophis sirtalis parietalis - 4 - - -

Columbine Dusky Wing Erynnis lucilius - 3 - -

Yellow-banded Bumble Bee Bombus terricola - 4/5 Special Concern -

Notes: COSEWIC = Committee on the Status of Endangered Wildlife in Canada; SARA = Species at Risk Act NatureServe Canada Rankings: 1 (critically imperiled; 2 (imperiled); 3 (vulnerable); 4 (apparently secure); 5 (secure); B (breeding)




4.2 SOCIO-ECONOMIC ENVIRONMENT

4.2.1 Population

The Town of Gillam has a population of approximately 1,265 people (Statistics Canada 2016). The population change between 2011 and 2016 was -5% (Statistics Canada 2016). Of the total 586 private dwellings recorded in 2016, 436 dwellings were occupied. However, three quarters of the dwellings in Gillam are owned by Manitoba Hydro and are rented out to employees (i.e., three quarters of dwellings are corporate housing). The total land area for the Town of Gillam is 1,996 sq.km. with a population density of 0.6 persons per sq.km. (Statistics Canada 2016).

4.2.2 Indigenous Communities

The closest First Nation community to the WTP site is the Fox Lake Cree Nation. The Fox Lake Cree Nation Reserve is made up of home reserves in Bird near the Limestone Generating Station on the Nelson River, the Gillam Reserve, and the Town of Gillam. The population of Fox Lake Cree Nation consists of 1,100 members with about 500 residents living on-reserve. The remaining members live mainly in Thompson, Churchill and Winnipeg (Fox Lake Cree Nation n.d.).

The RAA is located within the Fox Lake Cree Nation Special Consultation Area A. In addition, two treaty land entitlement selections exist within the RAA, namely “Gillam (1)” consisting of 100 acres in Section 4-85-18E and “20 Federal Lots/Gillam (3)” consisting of 5 acres located in the north half of Section 4-85-18E. The Fox Lake Cree Nation Community Interest Zone also encompasses the RAA. Fox Lake Cree Nation is in full support of the new WTP development in Gillam (see Appendix B).

4.2.3 Infrastructure and Services

PR 280 is the main route into Gillam from the west. PR 280 is a two-lane secondary arterial road (Manitoba Infrastructure 2017a). It is a Class A1 highway with a weight restriction of 56,500 kg maximum gross vehicle weight (Manitoba Infrastructure 2017b). Railway service to Gillam is provided by the Hudson Bay Railway line. Transmission lines connect to the Town of Gillam and its associated generating stations from points east and west. The Kettle Rapids Generating Station is located approximately 4.4 km northeast of Gillam. The Gillam Airport serves as a northern transportation air link between the town and points north and south.

Town of Gillam municipal services consist of a water treatment plant and distribution, sewage treatment plant, and garbage collection and operation of the waste disposal ground (Town of Gillam 2020). The Town of Gillam has a main hospital as part of the Northern Regional Health Authority. Services provided include a health clinic and seven acute care beds and three long-term care beds (NHRA 2019a). Other emergency services include ambulance, fire and police services. Education facilities in Gillam consist of public Nursery to Grade 12 school. The town maintains a RCMP detachment (Town of Gillam 2020). Telecommunication services in the Gillam region are provided by Bell MTS and CommStream. The Gillam area has access to home phone service, internet, and wireless (cell phone) service.




4.2.4 Land and Resource Use

The Town of Gillam is located over 1,000 km north of the Winnipeg, located in northeast Manitoba. Much of the town’s economic base centers on Manitoba Hydro and the service sector. The RAA includes Treaty Land Entitlement sites, the Split Lake Resource Management Area (RMA), Split Lake Registered Trapline District, and the Fox Lake Cree Nation Community Interest Zone (CIZ). The Project RAA encompasses three individual traplines. There are no protected areas, provincial parks or wildlife management areas in the RAA.

Land use and development control in the Project area is provided by the Town of Gillam Development Plan By-law No. 715-2012. The PDA is designated “Community Area”. Under Water and Wastewater Policies of the Plan, the upgrade and relocation of the water treatment plant to an area outside the central business area was identified (Town of Gillam 2012). The WTP site is located on land owned by the Province of Manitoba and administered locally by the Town of Gillam in the RAA. Under the Town of Gillam Zoning By-law No. 732.2014, lands associated with the WTP and water intake and sewer discharge pipeline routes are zoned as “LD – Limited Development Zone”. The LPS line and water distribution lines are also zoned “LD” while the site for the recirculation building is zoned “PR – Parks and Recreation Zone” (located on Public Reserve land). The intent of the “LD Zone” is to protect lands which are not required for specific urban uses at this time from untimely and inappropriate development. Permitted uses under the “Limited Development Zone” include major utility facilities (Town of Gillam 2014). Public utility, works or services means “any system, works, plant, equipment or services … including (b) production, transmission, delivery or furnishing of water…;” (Town of Gillam 2014).

Recreation and tourist activities and sites in the Town of Gillam include the Gillam Recreation Centre, marina, and campground at Stephens Lake. Outdoor recreation activities include fishing, boating, swimming, hiking trails, and cross-country skiing (Town of Gillam 2020). The surrounding area includes trails for the Gillam Snowmobile Club and all-terrain vehicles (Mussio Ventures Ltd. 2018). A public beach is located between the airport and proposed WTP site next to the existing WTP pump house and intake (see Figure 1-1b).

Hunting/outfitting and fishing activities occur within the Project RAA. The RAA encompasses Game Hunting Areas (GHA) 9, GHA 3, and Game Bird Hunting Zone (GBHZ) 2. Common big game species include moose, black bear, gray wolf, and caribou. Upland game birds and waterfowl hunted commonly include ptarmigan, ruffed grouse and various ducks and geese (Mussio Ventures Ltd. 2018). There are no hunting or fishing lodges and outfitters operating in GHA 9 and GHA 3 in the Gillam area (Travel Manitoba 2015).

4.2.5 Heritage Resources

Heritage resources are located in the Town of Gillam in the Project LAA and RAA. The VIA Rail/Canadian National Railways Station in the Project LAA is a designated historic place under Canada’s Historic Places Registry (Parks Canada 1992). Other historic sites of Manitoba in Gillam include the Gillam Switching Station (Railway Avenue), the Gillam War Memorial, the Gillam Cemetery, and the Kettle Generating Station, built in 1974, on the Nelson River (Manitoba Historical Society 2020). No municipal,




provincial or federal designated historic sites are located in the LAA or RAA (Manitoba Historical Society 2020; Manitoba Sport, Culture and Heritage 2017).

The Historic Resources Branch (HRB) Archaeological Assessment Services Unit was contacted to conduct a Heritage Screening for the proposed Project site. The HRB examined the applicable area proposed for development based on the Branch’s records for areas of potential concern. The Branch identified the potential for heritage concerns with the Project at this time as the proposed development is situated on Stephens Lake and the Nelson River, that latter of which has served as a major transportation corridor for Past Peoples. In addition, the area of the Project has not been surveyed and is bounded by an otherwise extensive distribution of archaeological sites. As such, a Heritage Resource Impact Assessment (HRIA) at the proposed location is required prior to project start (Appendix F; Senior Impact Assessment Archaeologist pers. comm. 2020c).

4.2.6 Human Health and Well-being

The Project RAA encompasses the Northern Regional Health Authority (NRHA) jurisdiction. As noted previously, the Town of Gillam is served by a hospital with acute and long-term care beds and emergency medical services (i.e., ambulance, fire). Overall, general health conditions in the NRHA, specifically within the Gillam/Fox District area (part of Zone 1), varies amongst the different zones and districts compared to the Manitoba average. Zone 1 in the NRHA, of which the Gillam/Fox District area is a part, had higher rates in overall cancer incidence. The NRHA also had higher rates of unintentional injury causing death and chronic kidney disease compared to the Manitoba average and other RHAs. The Gillam/Fox District area had higher rates of diabetes compared to the Manitoba average (NRHA 2019b). Slightly higher rates were noted for total mortality, pre-mature mortality, and potential avoidable death rates, although these were lower than the Manitoba average and second lowest among NRHA districts/zones, lower than other districts/ zones, and tied among the lowest compared to other districts/zones. The Gillam/Fox District area also has statistically lower diagnosis rates of mood and anxiety disorders than the Manitoba average and lower potential years of life lost compared to other districts/zones in the NRHA and the Manitoba average. Rates were stable for unintentional injury causing death, heart attack, and stroke compared to the Manitoba average (NRHA 2019b).

The Community Well-being (CWB) Index measures socio-economic well-being for communities across Canada based on census subdivisions (CSDs). The index comprises four components considered to be important to well-being: education, labour force activity, income, and housing (Government of Canada 2019). The four component topics are combined to create a single well-being score that ranges from a low of 0 to a high of 100. Values are available for the last Census reporting year 2016 for Gillam, Manitoba and are compared to the Manitoba non-Indigenous score. Overall, Gillam scored 80 points compared to the Manitoba non-Indigenous score of 78 points. Individual component scores were as follows: education at 56 points (55 for Manitoba); labour 88 points (87); income at 87 points (75); and housing at 91 points (94). CWB scores for Gillam are comparable to Manitoba overall (Government of Canada 2019).


Assessment Approach


5.0 ASSESSMENT APPROACH

5.1 PROJECT INTERACTIONS AND VALUED COMPONENTS

This assessment was completed to meet the requirements of an Environment Act Proposal (EAP) and includes assessing project-specific environmental effects. For the purposes of this assessment, the term environment refers broadly to biophysical and socio-economic elements of the environmental setting.

The assessment focuses on valued components (VCs), which are environmental components of particular value or interest to regulators and other parties and are identified based on the biophysical and socio-economic elements. Project-related effects on these VCs are assessed sequentially in the assessment. Residual effects are characterized using specific, predetermined criteria (e.g., direction, magnitude, geographical extent, duration, frequency).

5.1.1 Selection of Project Interactions and Valued Components

Biophysical and socio-economic VCs that could be affected through interactions of the environment with the Project are identified to scope the assessment. The VCs selected:

• Represent a broad biophysical or socio-economic component that might be affected by the Project; or

• Are of scientific, historical, or archaeological importance.

To focus the assessment on matters of greatest importance, potential interactions of the Project with the surrounding biophysical and socio-economic environment were identified using a variety of sources, including:

• Applicable provincial regulatory requirements

• Existing information regarding biophysical and socio-economic components found in the project area (e.g., vegetation, land uses, etc.) and results of desktop studies

• Professional judgement of the assessment practitioners, based on experience with similar projects elsewhere and other projects and activities in the project area

The rationale for selecting each VC is explained and potential interactions between the Project and VCs are identified in Table 5-1.


Assessment Approach


Table 5-1 Designation of Valued Components

Valued Component Potential Project

Interaction Rationale for Inclusion or Exclusion

Air quality Construction activities contribute to airshed loading from on-site equipment and truck usage. The WTP includes a backup diesel generator for emergency operation.

Surface water Process water withdrawn from Stephens Lake during operation.

Groundwater During construction of the WTP, effects on groundwater in terms of quality, flows or levels are limited to building foundations at the Project site.

Soils and vegetation The new building footprint on-site will result in some disturbance to soils and vegetation on town property. The route for the water intake pipelines to Stephens Lake will be directionally drilled. Vegetation includes forest and shrub covered areas that would be affected by Project activities.

Wildlife and wildlife habitat There is some wildlife habitat on-site at the WTP site and along the proposed water intake pipeline route. Tree cover removal for the WTP site is approx. 0.2 ha. The remainder of project components (sewer, treated water lines, recirculation building) occur within disturbed areas along road rights-of-way and on vacant cleared land.

Fish and fish habitat Construction and operation of the water intake pipelines may affect fish and fish habitat. Withdrawal of water is on a continual basis. The existing intake is located in the area where the new intakes will be installed and will be abandoned along with the existing pump house with the switchover to the new intakes.

Land and resource use x Site activities for the WTP, LPS line, water distribution line and recirculation building will occur within lands administered by the Town of Gillam. The WTP and associated structures are permitted uses under the Zoning by-law. Effect of the project on land and resource use is negligible.

Noise x Site is located approx. 630 m north of a residential area in the Town of Gillam and approx. 300 m east of a single residence. Construction at the project site has potential to generate some noise but would be comparatively small given existing vehicle and air traffic. Noise generation during operation will be negligible.

Infrastructure and services x The new WTP will generate construction traffic at the site and along the access road right-of-way but will be negligible in context of existing traffic. The new WTP may increase power usage at the site but utilities and infrastructure are anticipated to have sufficient capacity to accommodate the new WTP associated pumps. The new WTP will be an improvement to the local water infrastructure and supply service at the town.

Employment and economy x Benefits related to employment, tax generation from construction and operation will occur within the LAA; no adverse effects related to employment and economy in the LAA are anticipated; the new plant is expected to require a negligible increase in workforce with the addition of certified operator(s).


Assessment Approach


Table 5-1 Designation of Valued Components

Valued Component Potential Project

Interaction Rationale for Inclusion or Exclusion

Heritage resources Review of heritage resource records have indicated there is potential for heritage concerns at the site and in the Project area.

Human Health and Well-being

Noise effects from construction and operation of the WTP will be limited to the PDA. There is one residence located in close proximity to the site (approx. 300 m). The owner will benefit from the Project as their residence will be connected to the new LPS. Contractors engaged in the construction phase of the proposed Project will be subject to site specific health and safety plans and worker protection standards and procedures under the provincial Workplace Safety and Health Act. Operational worker health and safety programs and policies will be implemented for the WTP at the Project site.

Once interactions that are likely to have effects are identified and the VCs determined, an analytical framework is used to evaluate and characterize the potential project effects according to a set of standardized criteria to facilitate quantitative (where possible) and qualitative assessment of residual effects (see Section 5.2).

5.2 RESIDUAL EFFECTS CRITERIA

Terms used to characterize the residual environmental effects are summarized in Table 5-2.

Table 5-2 Definition of Terms Used to Characterize Residual Environmental Effects

Characterization Description Quantitative Measure or Qualitative Categories

Direction The long-term trend of the residual effect

Positive— an improvement in the valued component compared with existing conditions and trends Adverse— a decline in the valued component compared with existing conditions and trends Neutral— no change in the valued component from existing conditions and trends

Magnitude The amount of change in the VC relative to existing conditions

Negligible—no measurable change Low— a change that falls within the level of natural variability Moderate— a measurable change which is unlikely to affect the valued component High— a measurable change which is likely to affect the valued component

Geographic Extent The geographic area in which an environmental effect occurs

PDA—residual effects are restricted to the PDA LAA—residual effects extend into the LAA (up to a 2 km radius of project site) RAA—residual effects extend to other adjacent areas of the property up to a 10 km radius


Assessment Approach


Table 5-2 Definition of Terms Used to Characterize Residual Environmental Effects

Characterization Description Quantitative Measure or Qualitative Categories

Frequency When the residual effect occurs and how often

Single event— residual effect occurs once throughout the life of the Project Multiple irregular event— residual effect occurs sporadically and intermittently (no set schedule) throughout Multiple regular event— residual effect occurs repeatedly and regularly throughout Continuous—residual effect occurs continuously throughout the life of the Project

Duration The period of time required until VC returns to existing condition, or the effect can no longer be measured or otherwise perceived

Short-term— residual effect restricted to the duration of construction (assumed to be 16 months) or less Medium-term— residual effect extends to ten years Long-term— residual effect extends for longer than ten years

Reversibility Whether the VC can return to existing condition after project activity ceases

Reversible—the effect is likely to be reversed after activity completion and decommissioning Irreversible—the effect is unlikely to be reversed even after decommissioning

Ecological and Socio-economic Context

Existing condition and trends in the area where environmental effects occur

Undisturbed—area is relatively undisturbed or not adversely affected by human activity Disturbed—area has been substantially previously disturbed by human development or human development is still present


Project Environmental Effects


6.0 PROJECT ENVIRONMENTAL EFFECTS

6.1 BIOPHYSICAL ENVIRONMENT

6.1.1 Atmosphere

There is potential for atmospheric emissions and fugitive dust generation from Project construction activities. Vehicle and equipment emissions will occur from activities during construction and transportation of goods and materials (including fuel) to/from the construction site. Increased volatile organic compound (VOC) levels could result from fuels used during construction. The Project is expected to contribute only nominally to greenhouse gas emissions (GHGs) during the construction period.

Dust will be generated as a result of construction activities such as open excavations, site travel, clearing and grubbing at the proposed WTP site. Site vehicle and equipment exhaust emissions can cause changes to air quality. The effect of vehicle and equipment emissions on air quality during construction will be of short-term duration, occurring on a continuous basis during work hours of the construction period in the PDA.

During operation the WTP will be primarily heated electrically, limiting the potential for air emissions to those associated with the intermittent use of the backup diesel generator at the WTP and incidental staff and supply traffic. The outdoor generator, housed within its own weather-proof enclosure, would be limited to operation during power outages and monthly maintenance activities.

The existing plant, which uses the same WTP process (save for UV disinfection), chemicals, heating, back-up power supply, etc. will not be used once the new WTP is operational. As such, there will be a negligible increase in emissions over the existing case.

Mitigation

Emissions resulting from operation of construction and transportation equipment will be mitigated by the following:

• using well-maintained and operated vehicles while reducing unnecessary vehicle idling

• using an approved dust suppressant on construction sites

• limiting construction during high wind periods

• limiting the height of material stockpiles

• limiting the area of exposed soil

• re-establishing vegetation promptly following construction




The operation of the WTP and related works is expected to produce negligible atmospheric emissions from site equipment and vehicles (chemical delivery, sludge removal, staff vehicles, maintenance runs of the generator, mowers, etc.).

Additional measures related to pollution control and equipment usage are outlined under the Environmental Protection Section in the Town of Gillam’s Statement of Requirements Document (Town of Gillam 2019).

Summary

After implementation of mitigation measures, the residual effects on air quality are expected to be negligible in magnitude, limited to the PDA (>RAA for GHG emissions), short-term and continuous during construction, long-term (GHG emissions) and short-term on a regular to irregular in frequency during operation, reversible, and occurring within a disturbed context. As such, the potential residual effect on air quality is considered not significant.

6.1.2 Soils and Vegetation

During Project construction, soils will be disturbed by clearing, excavation, and grading, soil losses can also occur due to erosion, and compaction associated with equipment operating at the site. Compaction of soils would be limited to the immediate cleared footprint for the Project and excavation activities associated with building foundations and pipeline installation work.

The area to be developed is largely located in a treed area with some criss-cross cut lines, disturbed road right-of-way, and emergent vegetation along Stephens Lake. Limited clearing of woody vegetation cover for the WTP footprint and intake water pipeline ROW will be required for the Project (approx. 0.2 ha).

The Project will disturb an area of approximately 893 m2 (36.0 m by 24.8 m) within a total area of 5.8 ha at the WTP site (see Appendix A, Figure 1-2). The remainder of Project components (i.e., sewer line, water distribution lines, recirculation building) will occur along existing road rights-of-way and disturbed property adjacent or near to the existing WTP. The route for the dual water intake pipelines will be directionally drilled and placed at a minimum depth of 2.5 m over a distance of approximately 300 m along a previously cleared path to near the lake edge. Disturbance of soils in the Project area will be reduced during construction by keeping heavy equipment operations limited to the project site, existing road right-of-way, and outside the emergent vegetation at the bank to the extent possible. Potential effects on soil are considered low given the small amount of equipment and quantity of fuel, lubricants and materials that would be present at the Project site.

Building construction will require clearing and grubbing and removal of treed vegetation for the WTP footprint and a strip above the water intake pipelines (approx. 0.2 ha). The amount of clearing and disturbance is small relative to the remaining adjacent wooded areas surrounding the WTP Project site. Clearing of trees at the Project site was undertaken in April 2020 in advance of construction to avoid breeding bird windows for migratory birds. The town designated a staging area at the end of Airport Road, approaching the lake on the west side of the road, for the storage of cut trees (Town of Gillam 2019b). New road access will be provided to the new WTP as part of new parking lot development for the site. For




the dual water intake pipeline route, proposed construction will utilize directional drill methods and will be located underneath a cleared strip to the shore of Stephens Lake. Disturbance of emergent/riparian vegetation at the bank will be avoided by the extension of the pipeline into the lake via directional drill. The routes for the LPS line, treated water distribution lines will be installed along existing road right-of-way. The recirculation building will be constructed on a vacant cleared piece of land across from the existing WTP.

A request submitted to MBCDC for existing records of vegetation species of conservation concern indicated no records of previous observations of such species in the Project area (MBCDC Information Manager pers. comm. 2020). No protected native vegetation species are expected to be directly affected by the Project given the nature of the Project area.

Mitigation

Potential Project effects on soil and vegetation from construction will be mitigated by implementing the following measures:

• limiting construction equipment and vehicle movements to designated roads and pathways within and around work areas

• reducing disturbed/exposed areas and rehabilitating areas as soon as practical where required

• stripping and stockpiling topsoil on the Project site for use in site restoration

• making repair to areas where equipment has compacted soils, if any

• using horizontal directional drilling

• revegetating disturbed soils as soon as practical where required

• re-establishing disturbed vegetation in riparian zones as soon as practical

Additional measures related to site clearing and plant protection, storage and handling of hazardous substances, and clean-ups of leaks and spills are outlined under the Environmental Protection Section in the Town of Gillam’s Statement of Requirements Document, including measures related to an erosion and sediment control plan (PCL et al. 2020).

The operational phase of the Project is not anticipated to generate any additional adverse effects on soil and vegetation.

Summary

After implementation of design mitigation measures, the residual effects on soil and vegetation at the WTP site and the associated water intake pipeline are expected to be negligible in magnitude, limited to the PDA, long-term in duration, continuous, reversible, and occurring within a disturbed ecological context. As such, the potential residual effect on soil and vegetation is considered not significant.




6.1.3 Groundwater

During construction, excavation activities for foundations at the Project site have the potential to encounter groundwater. A review of the groundwater investigation undertaken at the PDA involving three test holes revealed site stratigraphy of a thin layer of peat overlying alluvial silty sand to sandy silt and silty sand to sand silt till underlying the site. Groundwater infiltration and sloughing was encountered in the lower silty sand to sandy silt and till during drilling at depths ranging from 4.6 m to 9.9 m below grade. Groundwater levels are likely to fluctuate seasonally and following precipitation events. Groundwater levels were noted at 0.9 m, 6.4 m and 8.1 m below grade. There are no active groundwater wells recorded at the Project site (Groundwater Information Network 2014). No evidence of permafrost was observed in the overburden soils during drilling (KGS Group 2019a).

There is potential to encounter difficult ground conditions. Construction of the WTP is proposed to be supported by a concrete mat foundation on a compacted granular base founded on the underlying dense silty sand, to a minimum depth of 3.5 m below grade (KGS Group 2019a). Groundwater inflow and potential sloughing are anticipated at the site. Design for temporary pumping as well as shoring or temporary slopes for excavation depths greater than 1.5 m deep, or below the water table will be developed by a qualified engineer. Design of these measures will depend on the size, depth and extent of the excavation (KGS Group 2019a). The dewatered groundwater is likely to be directed to a surface drainage ditch.

Surface drainage will be directed away from building foundations by final site grading to reduce water accumulation on-site. Parking, loading/unloading areas, and landscaping within approximately 2 m of the exterior perimeter of any structure will be sloped away from structures (KGS Group 2019a). With the implementation of building and foundation design measures, the effects of building construction on groundwater are expected to be negligible.

During WTP operations, wastewater will be discharged to a LPS system via a new buried sewer pipeline on a continuous basis, subject to periodic shut down for maintenance purposes.

Mitigation

Mitigation of groundwater issues during construction (i.e., dewatering) may be achieved by redirecting groundwater inflow by pumping accumulated groundwater to adjacent ditches and providing erosion control measures such as silt fences as required. Measures related to drainage and pumping are outlined under the Environmental Protection Section in the Town of Gillam’s Statement of Requirements Document (Town of Gillam 2019). Pumped water, that is free of suspended materials, is to be directed to waterways, sewer or drainage systems if permitted by regulatory authorities (Town of Gillam 2019).

The WTP will be supplied with raw water from Stephens Lake (PCL et al. 2020). Potential operational effects on groundwater will be mitigated through design and treatment measures incorporated into the plant.

There will be no pollutants directly released or disposed of on or into the ground either during construction or normal operations at the WTP site. Chemical storage tanks will be subject to proper engineering




design and will be designed and constructed in accordance with appropriate regulations and guidelines. Domestic sewage, process wastewater from the DAF and filters, and centrate from the centrifuge will be discharged to the LPS via a small lift station and ultimately to the wastewater treatment plant. No potential adverse effects are anticipated from normal WTP operation on groundwater quality, flows and levels in the area.

Summary

After implementation of design mitigation measures, the residual effects on groundwater at the WTP site are expected to be negligible in magnitude, extend to the LAA, be short-term in duration, continuous, reversible, and occurring within a disturbed ecological context. As such, the potential residual effects on groundwater are considered not significant.

6.1.4 Surface Water

There is one surface water feature adjacent to the WTP Project site. Stephens Lake is located approximately 165 m to the northeast of the proposed WTP. Impacts to surface water quality may occur as a result of construction activities through erosion/sedimentation from soil disturbances and stockpiles, emissions from directional drilling activities, and equipment/vehicle movement related to surface drainage. Impacts to surface water quality and quantity from operation may occur through backwashing of the sand pack to dislodge settled fines, discharging chemical for zebra mussel control, and withdrawing water from Stephens Lake.

Directional drill boring will vary from 150 m to 200 m from Stephens Lake, south of the proposed WTP location, depending on the water level at the time of drilling. The dual water intake pipelines will be extended into Stephens Lake beneath the lakebed via the directional drill method and will daylight in the lake approximately 300 m from the WTP. The pipelines will have a properly sized well screen installed horizontally on the lakebed covered by 300 mm of 25 mm clean stone, 300 mm of pea gravel, and 300 mm of sand pack. Directional drilling activity will necessitate the placement of a silt curtain along the entire length of the affected area. Drilling mud and other sediment-laden water will be contained to avoid its migration into the watercourse in accordance with Provincial and Federal requirements, including DFO requirements and standards or codes of practice (Town of Gillam 2019; KGS Group 2019b; DFO 2020). Appropriate signage will be posted for the intake pipes to deter damage to the pipes.

Stephens Lake is subject to occasional blue-green algae outbreaks. The WTP and the intakes will be designed to account for blue-green algae blooms and zebra mussels in the water source. Maintaining water quality at the WTP will be aided by the use of subsurface intakes. The water intake lines will include a 25 mm pipe that could potentially provide sodium hypochlorite (12%) in future, if required. Chemical use would function as a temporary back-up to the sand pack cover in the event that the sand pack cover was lost. The chemical feed would only occur while the intake pump is running and would act to pull the chemical back to the plant. Sodium hypochlorite injection to the intake screens is ODWs recommended solution to mitigate against zebra mussels (Manitoba Sustainable Development 2018). The infiltration bed intake will be a sand bed which according to the Office of Drinking Water (ODW) zebra mussel guidelines, is an approved prevention method (Manitoba Sustainable Development 2018).




Domestic sewage, process wastewater from the DAF and filters (i.e., filter to waste water and backwash from WTP filters), and centrate from the centrifuge will be discharged to the LPS. The wastewater discharged from the new WTP to the sewer system via a new LPS line will flow to the wastewater treatment plant, ultimately discharging back to Stephens Lake (see Appendix D – Water Conservation Report for planned conservation measures).

For operation and maintenance, the intake pipelines will be flushed with pumped water to provide an upward flow for backwash of fine suspended matter that has settled on the inlet. Clogging of the intake lines, if it were to occur, would be addressed by mechanically cleaning (pigging) out the lines by divers. The intake screen would first be removed, the lines cleaned, and then the intake screen replaced with additional infiltration media added for operation.

The quantity of water withdrawn for new WTP operation will be negligible compared to the volume of water in Stephens Lake and will be similar to volumes currently being withdrawn via the existing WTPs intake. The existing intake and pump house, located adjacent to the new WTP intakes, will be abandoned.

Mitigation

Mitigation of surface water issues during construction may be achieved by redirecting surface water runoff, pumping accumulated water to adjacent ditches, and providing erosion control measures such as silt fences as required. Other mitigation measures include:

• maintaining existing surface drainage patterns on site

• installing silt fencing and other erosion protection measures as necessary for construction to reduce erosion and off-site sediment transport

• limiting construction activities during heavy precipitation/runoff events

• maintaining a 100-m setback from Stephens Lake for fueling, servicing, and washing activities for vehicles and equipment

• avoiding vehicle and equipment entering riparian zones as much as practical

• avoiding storage of fuel and other materials within 100 metres of Stephens Lake to reduce the risk of deposit of deleterious substances to surface water

• placing silt curtains on either side of area to be directionally drilled and monitoring water intake pipe installation

• DFO approval in terms of additional applicable mitigation measures and applicable standards and code of practice for managing release of sediment-laden water will be adhered to




These requirements will be incorporated in the Tender Specifications for the Project. Additional measures related to drainage are outlined under the Environmental Protection Section in the Town of Gillam’s Statement of Requirements Document (Town of Gillam 2019).

Required measures will also be implemented to mitigate in-water construction works for the protection of fish and fish habitat as determined through the DFO Request for Review process.

Summary

Surface water effects from the operation of the proposed new WTP and water intake pipelines will be mitigated by adherence to mitigation measures to address surface water quality. No adverse effects are anticipated on surface water quantity as there is sufficient volume in Stephens Lake. The proposed WTP will be designed through mitigation measures to address construction and future operational requirements.

After implementation of mitigation measures, the residual effects on surface water quality (and quantity) are expected to be negligible to low in magnitude, limited to the LAA, long-term in duration, continuous, reversible, and occurring within a disturbed ecological context. As such, the potential residual effect on surface water quality (and quantity) from the WTP is considered not significant.

6.1.5 Fish and Fish Habitat

Stephens Lake is the source of water for the project and is a surface water body utilized by fish, providing fish habitat for several species. Potential construction phase effects of the Project on fish and fish habitat can result from the deposition of sediment from construction activities (i.e., blown dust, exposed surface runoff), installation of the intake lines and inlet structures and related direct habitat loss/disturbance, and potential effects of disturbance to riparian areas.

Construction of the water intake lines will alter fish habitat within the limits of placed granular material. The area of disturbance is relatively small in comparison to overall surface area of Stephens Lake (i.e., 29,930 ha) and the expected pervasiveness of sediments (KGS Group 2019b). Granular materials will be placed over an area of 50 m2 at the end of the water intake pipelines. The remainder of the water pipelines will be below the lake sediment (KGS Group 2019b).

Potential operation phase effects of the Project on fish and fish habitat can result from backwashing the intake sand pack media and screen (sediment resuspension and dispersion), in-water activities to clean and maintain the intake lines (removal and replacement of sand pack and screen, dispersing sediment, to provide maintenance access), and release of chemicals in the intake lines for zebra mussel control (expected to be infrequent and limited).

Mitigation

With the exception of vegetation clearing for the intake lines (completed in April 2020) riparian habitat and emergent vegetation near the shore of Stephens Lake will not be directly affected by construction activities and resulting effects on fish and fish habitat will be limited and mitigatable.




Installation of the intake lines will be accomplished using trenchless methods and monitored to mitigate risks of drilling mud emissions into the lake during installation. Additional mitigation measures such as the use of silt curtains and other measures (such as proper timing for installation vs spawning windows) will limit potential effects to fish and fish habitat during construction. The DFO restricted activity timing windows for fish species in northern Manitoba extend from April 15 to July 15 (for spring and summer spawners) and from September 1 to May 15 (for fall spawners) (Fisheries and Oceans Canada 2013). The period for avoiding In-water work would extend from September 1 to July 15 of any given year. As such, in-water work will be conducted between July 16 and August 31 to protect fish. Additional mitigation measures will be implemented to mitigate effects on fish and fish habitat from working in water related to the erosion and sediment control measures and management of deleterious substances as per DFO’s Measures to Protect Fish and Fish Habitat and as determined through the DFO Request for Review process (see Appendix E).

Measures include the following:

• conducting in-stream work and excavation work where flows are isolated with installation of a silt curtain

• implementing in-water activities, or associated in-water structures, so as not to interfere with fish passage, or result in stranding or death of fish

• placing a sand bed cover over the intake pipelines to protect fish from entrapment, and screening the intake pipelines in accordance with guidelines to avoid entrainment or impingement of fish (DFO Freshwater Intake End-of-Pipe Fish Screen Guideline 1995)

An anticipated Letter of Advice from DFO on Project approval is pending (pers. comm. 2020d). Additional measures related to work adjacent to waterways are outlined under the Environmental Protection Section in the Town of Gillam’s Statement of Requirements Document (Town of Gillam 2019).

Summary

The potential residual project effects are expected to result in an adverse effect to fish and fish habitat. The effect is expected to be negligible in magnitude and anticipated to affect fish habitat in portions of the PDA and immediate proximate portion of the LAA. The change will be long-term in duration, and continuous, occurring within a disturbed ecological context but will meet federal guidelines for the protection of fish and fish habitat. As such, residual effects on fish and fish habitat are considered not significant.

6.1.6 Wildlife and Wildlife Habitat

There is a potential for ground disturbance activities, such as clearing, stripping, and excavating, to disturb breeding wildlife, including nesting birds. There is also potential to affect terrestrial habitat from clearing for installation of the water intake pipelines to the WTP via directional drill and excavation methods where the pipelines are to be installed and from sewer and water distribution line installation and recirculation building construction.




Limited clearing of woody vegetation cover for the WTP footprint and intake water pipeline ROW will be required for the Project (approx. 0.2 ha). The Project will disturb an area of approximately 893 m2 (36.0 m by 24.8 m) within a total area of 5.8 ha at the WTP site (see Appendix A, Figure 1-2). The remainder of Project components (i.e., sewer line, water distribution lines, recirculation building) will occur along existing road rights-of-way and disturbed property across from the existing WTP.

A request submitted to MBCDC for existing recorded observations of species of conservation concern, and a search of the Manitoba Herps Atlas (Manitoba Herps Atlas 2020), and eBird (eBird 2020) revealed records of six SOCC that have been observed within the RAA (Table 4-4). The WTP site to a large extent was forest-covered, cleared prior to breeding bird nesting season in early April 2020. In addition, the WTP site is bordered by existing roads and trails, the public beach and the existing pump house which is located next to the Gillam Airport. The water intake pipelines will be installed using direction drill methods and will daylight into Stephens Lake. Given the nature and timing of the Project activities (i.e., clearing), no protected wildlife species are expected to be directly affected by the Project.

Mitigation

Effects to wildlife habitat will be limited to the PDA and immediate LAA during construction associated with soil and vegetation disturbance. Other effects resulting from dust or exhaust will be reduced as previously indicated in Section 6.1.1. Incremental noise disturbance will be negligible as the construction area is located next to an active airport and along an existing road right-of-way.

Project construction is anticipated to occur over the period of July 2020 to October 2021. Given that the WTP area and right-of-way for the water intake pipelines has been cleared in advance and the method of pipeline installation to be employed (directional drilling), Project-related disturbance activities from vegetation clearing or ground disturbance to wildlife and wildlife habitat will be low. Should further clearing be required outside of the currently cleared area, effects can be reduced by avoiding the sensitive breeding window for migratory bird wildlife species (including bird SOCC) – mid-April to end of August (Environment and Climate Change Canada 2018). If additional ground disturbance/clearing must be undertaken during the sensitive nesting period, a pre-construction nest survey is to be conducted by a qualified biologist to locate and buffer active bird nests to the extent possible.

Construction workers should also be aware of the potential for amphibian species to be present in the Project area; they will be required to report sightings and take caution to avoid harming a sensitive species. The area to be developed is currently a forested area with some disturbed road right-of-way and cut trails and emergent/riparian vegetation on the lakeshore. Limited clearing of woody vegetation cover will be required for the new plant and water intake pipelines (approx. 0.2 ha).

Summary

With implementation of the mitigation measures identified above, the potential residual effect to wildlife is anticipated to be negligible to low in magnitude, limited to the PDA/LAA, short-term and reversible, and occurring within an undisturbed/disturbed ecological context. No further operational effects on wildlife are expected once the plant and pipeline are commissioned. As such, residual effects are considered not significant.




6.2 SOCIO-ECONOMIC ENVIRONMENT

6.2.1 Socio-economic Components

The construction Project is expected to have negligible effects on human health and well-being. The operation of the new WTP, and associated water intake pipelines, will improve the drinking water supply situation to the Town of Gillam.

There is some potential for noise effects in the immediate area from the operation of construction equipment and vehicles. Noise effects could cause temporary disturbance to wildlife in the area and residents in close vicinity of the Project site (i.e., nearest residence is approx. 300 m to the southwest). Construction noise effects are expected to be low and short-term in duration.

The size of the construction workforce for the proposed WTP is expected to be approximately 30 to 35 workers at construction peak. Workers are expected to be housed at accommodations within the Town of Gillam with meals provided at Kettle Camp. Up to 35 vehicles will travel back and forth to the work site on a daily basis. Cultural awareness training will be provided by the town for all construction employees who are from outside the community and will be conducted within the first week of mobilization. Up to four workers will be required for operation of the WTP. Vehicular access will be limited to existing municipal roads only to reduce potential conflicts with local traffic. The potential adverse effects of the increase in vehicle traffic along PR 280 east of Gillam over existing levels (i.e., 400 to 510 veh/day maximum AADT [MI and University of Manitoba 2018]) are anticipated to be low for construction to negligible (for operation), irregular, and short-term in duration.

During operation, noise will be generated by equipment in the new plant (i.e., pumps, blowers and other equipment in the facility), water hauling trucks, truck trailers, regular vehicle traffic (i.e., employees, visitors) and maintenance vehicles (i.e., grass mowers, etc.). Noise from the equipment in the WTP building at the site is expected to be negligible as they will be contained within the proposed works. Other operating noise at the site would only be intermittent in nature and limited in duration. As such, noise-related human health effects from the Project are anticipated to be negligible.

Mitigation

The new WTP is an improvement in water utility over the existing plant. The improvement in treated water will benefit users in the Town of Gillam and provide a more reliable supply and will allow for Town expansion. No mitigation measures are proposed. Effects of noise during construction will be mitigated by reducing vehicle idling to reduce noise emissions. Vehicles will also be maintained in good working order. During operations, workers will be provided with hearing protection and clear signage will be posted for those areas where hearing protection is required.

Additional measures related to pollution control, equipment usage, storage and handling of hazardous substances, and clean-up of spills and leaks are outlined under the Environmental Protection Section in the Town of Gillam’s Statement of Requirements Document (Town of Gillam 2019).




Summary

The proposed WTP will be designed to meet the GCDWQ / DWSA design criteria as described in Section 2.1. Health effects from the operation of the proposed new WTP and water intake pipelines will be mitigated by adherence to Manitoba standards and Health Canada guidelines for water quality. The proposed WTP treatment process will meet future operational requirements of the WTP and anticipated target water quality criteria.

With implementation of the mitigation measures identified above, the potential residual effect to human health and well-being is anticipated to be positive, negligible in magnitude, limited to the PDA, short- to long-term and reversible, and occurring within a disturbed socio-economic context. No further operational effects on human health and safety are expected once the plant and pipeline are commissioned. As such, residual effects are considered not significant.

6.2.2 Heritage Resources

Heritage resources, and their associated artifacts and cultural data, are protected under The Heritage Resources Act. The Heritage Resources Branch (HRB) Archaeological Assessment Services Unit was contacted to undertake a Heritage Screening for the proposed Project site. The HRB examined the applicable area proposed for development based on the Branch’s records for areas of potential concern. The Branch identified the potential for heritage concerns with the Project at this time as the proposed development is situated on Stephens Lake and the Nelson River, that latter of which has served as a major transportation corridor for Past Peoples. In addition, the area of the Project has not been surveyed and is bounded by an otherwise extensive distribution of archaeological sites.

Mitigation

As per direction from the HRB, the developer is required to have a Heritage Resource Impact Assessment (HRIA) conducted at the proposed location for the WTP and intake pipelines. No heritage resources have been observed in the area at the time of EAP preparation as a HRIA site visit has not yet occurred. In the event that unknown heritage resources, or objects thought to be heritage resources, are exposed during construction, work in the area will cease until Historic Resources Branch authorities have been notified and the item investigated. The HRB may require that an acceptable heritage resource management strategy be implemented to mitigate the effects on encountered heritage resources.

Summary

The HRB will review the scope of the field investigation and reporting once a HRIA has been filed to determine whether the heritage resource impact assessment requirements under Section 12 (2) of The Heritage Resources Act (1986) for the proposed WTP Project have been met.


Accidents and Malfunctions


7.0 ACCIDENTS AND MALFUNCTIONS

7.1 GENERAL HEALTH AND SAFETY

The effects of accidents and malfunctions for the Project are primarily related to the potential for mechanical equipment failure, fire/explosion, fuel or other chemical spills, and transportation accidents. The following sections outline the potential effects from accidents and malfunctions and the measures proposed to avoid accidents and malfunctions.

An Emergency Response Plan for the new operation will be developed as part of the new Gillam WTP. The plant’s critical infrastructure will have both duty, standby, and backup equipment (i.e., pumps, power generator). Practices at the Project site will be performed in accordance with The Workplace Safety and Health Act, which will serve to reduce the potential effects on health and safety. Personal protective equipment and safety equipment will be provided for employee(s) working in the facility, where required.

7.2 SCENARIOS

7.2.1 Fire/Explosion

During construction and operation, there is the potential for a fire at the Project site involving mechanical equipment and fuels. Effects related to fires include harm to on-site personnel, damage to equipment and property, and the potential release of contaminants and hazardous materials. The plant includes a backup generator that is fueled by a diesel fuel source.

There is also the potential for explosions associated with chemical storage at the site (i.e., sodium hypochlorite, sodium hydroxide, and fluorosilicic acid) if an accident were to happen. The design of the chemical storage area for the provision of required chemicals will be in accordance with applicable regulations and guidelines.

Precautions and mitigative actions will be taken to avoid fire hazards at the Project site, such as removing flammable waste and combustible materials, and the proper storage and handling of potentially hazardous materials and chemicals.

7.2.2 Spills

During construction and operation, there is potential for environmental effects due to fuel and chemical spills and/or leaks of lubricants from equipment and activities at the Project site. Accidents could result in the release of hazardous materials and/or equipment fluids or fuels from equipment or vehicles and chemical spills from improper storage and handling procedures and from equipment failure. As a result of spills, effects on air quality, surface water drainage, surface water, groundwater quality, soil degradation, fish and fish habitat, and human health and safety are possible.




Adherence to standard environmental protection practices will reduce the risk and adverse effects associated with accidental spills or leaks. Provincial regulations related to chemical storage, spill containment, and requirements respecting the storage, handling and transport of dangerous goods and hazardous wastes will also be adhered to. Emergency response plans, procedures and equipment will also address the potential for accidental release of fuel, chemicals or other hazardous materials and will serve to reduce the potential effects.

The likelihood of erosion/deposition from WTP construction activities or a spill/leak at the site directly affecting fish bearing water bodies is considered low given the proactive installation of silt fences and erosion control measures at the WTP site (as indicated in Sections 6.1.2 and 6.1.4) to reduce erosion and deposition off-site, combined with the distance between the WTP Project site and Stephens Lake.

Potential effects resulting from spills occurring during the construction phase are anticipated to be irregular and short-term in duration. A spill, if it were to occur, would predominantly be contained within the Project site; the magnitude of a spill effect could range from negligible to moderate and would depend on the size and nature of the spill. During the operations phase, the regular inspection and maintenance of vehicles and plant equipment would serve to reduce the risk of spills occurring at the site.

Equipment malfunctions related to pump and pipe failures could occur resulting in the release of chemicals or raw or partially treated water to the environment. New pumps and distribution flow piping for the WTP will be tested prior to operation to assess for potential issues or leaks. Regular inspection of accessible pipes and pumps will be conducted by WTP personnel. It is expected that adherence to engineering design of processes meeting applicable codes of practice and equipment standards will mitigate the potential for these effects.

7.2.3 Transportation Accidents

Transportation accidents can result in the release of vehicle fluids to the environment (i.e., diesel, gasoline, oils, etc.) and the materials the vehicles were transporting (i.e., aluminum sulfate (alum), polymers (polyelectrolytes), sodium hypochlorite, sodium hydroxide, fluorosilicic acid, and sludge). Effects related to such releases can include air, soil, and surface water quality effects with potential for subsequent effects on the environment and human health.

During the construction phase, there will be an increase in the number of vehicles travelling to and from the Project site with construction equipment and associated materials. The potential for an increase in vehicle traffic along PR 280 over existing levels that could lead to transportation accidents is anticipated to be negligible. Operational traffic at the WTP site (i.e., deliveries) operates at slow speeds to reduce the potential for on-site transportation accidents. The WTP will utilize appropriately qualified drivers, and/or appropriately qualified companies, to transport materials and products to and from the site to reduce the potential for transportation risks.




7.2.3.1 Mitigation Measures

Measures to avoid or reduce potential adverse effects associated with fire/explosion, spills, equipment failure, and transportation accidents are as follows:

• Flammable waste and combustible materials (i.e., greasy/oily rags) will be removed on a regular basis and disposed of at an appropriate licensed disposal facility.

• Appropriate fire extinguishers will be available on-site during operations and are maintained to manufacturer’s standards.

• Potentially hazardous materials and chemicals will be stored and handled at dedicated areas and labelled in accordance with applicable regulatory requirements.

• Hazardous materials will be transported in accordance with the Dangerous Goods Handling and Transportation Act and used according to product-use instructions.

• Regular waste materials will be deposited and stored in appropriate containers and removed from the site on a regular basis for disposal at an appropriate facility.

• Refueling of vehicles and equipment will adhere to proper procedures and will use designated refueling areas or will be refueled off-site.

• Emergency spill kits will be maintained on-site and staff will be trained to properly deploy spill kit materials and cleanup spills.

• Vehicles and equipment will be maintained to reduce leaks. Regular inspections of hydraulic and fuel systems on equipment and machinery will be undertaken by the Contractor on a routine basis. Leaks detected will be repaired immediately by trained personnel.

• Chemical transfers for the chemical feed system from delivery vehicles to the chemical storage area and from the storage area to process equipment will be monitored.

• Existing traffic control measures (i.e., speed limits, signage) will be adhered to.

• The Town of Gillam WTP will maintain a Safety and Health Program which includes policies related to emergency preparedness and response plan, WHMIS and spill response procedures during WTP operation.

• All releases of hazardous substances into the environment (i.e., air, ground, water, drains, sewer systems, ditches, road, parking areas, etc.) will be reported to Contractor and Owner.

• The Project site will be inspected from time to time to ensure compliance with federal, provincial, and local environmental requirements.




7.2.4 Summary

To reduce the likelihood and severity of accidents and malfunctions, the construction and operation of the WTP will be conducted in accordance with regulatory requirements. The implementation of, and adherence to, measures outlined in an Emergency Response Plan to mitigate potential effects related to accidents and malfunctions will serve to reduce the likelihood of these events occurring. As such, the residual effects are considered to be not significant.


Follow-up, Monitoring and Reporting


8.0 FOLLOW-UP, MONITORING AND REPORTING

Applicable warranties will be applied to the operation and performance of structures, equipment and process components related to the WTP and associated works. Following commissioning and acceptance testing, monitoring will occur to evaluate that the potable water quality meets the appropriate requirements.

The WTP will be operated by certified operators (currently engaged) by the owner. Specific training for the proposed plant operation and maintenance will be provided during start-up and commissioning. This includes plant optimization, plant monitoring, and laboratory techniques to monitor day-to-day treatment operations for meeting the water quality and treatment requirements.

The proposed DAF process for the WTP is an established treatment system for the Town of Gillam. As a part of this project, a plant operation and management manual will be prepared to outline maintenance requirements, detailed process operations, troubleshooting and testing requirements. Safety equipment will be provided for use by the operations staff.

Processes related to water treatment are well known and the environmental effects are similarly well understood. As such, follow-up and monitoring is not required outside of anticipated typical monitoring and reporting requirements for the operation of the WTP.

Follow-up may be required with DFO in terms of a Request for Review with respect to in-water work for the water intake structures. Monitoring requirements during the installation of the water intake pipelines into Stephens Lake (e.g., turbidity monitoring) will be determined through the DFO assessment process.


Conclusion


9.0 CONCLUSION

Stantec has prepared this environmental assessment report on behalf of the Town of Gillam in support of the EAP application for the proposed WTP and associated works defined under the Classes of Development Regulation (MR 164/88) as a “Class 2 development”. The EAP application is filed in accordance with Section 11 of The Environment Act for a valid and subsisting Environment Act Licence from MCC for its operation.

The potential adverse residual environmental effects related to the proposed WTP and water intake pipeline for the Town of Gillam were found to be negligible to low in magnitude for normal operations and negligible to moderate in magnitude in the event of accidents and/or malfunctions. The WTP Project will result in an improvement to the water supply, treatment, and water quality to meet current operational requirements of the town and meet the anticipated target design criteria for the surface water source for the facility.

On the basis of desktop studies undertaken for the Town of Gillam WTP Project and information available to date as presented in this report, potential adverse effects to the biophysical and socio-economic environment associated with the proposed Project are expected to be not significant.


References


10.0 REFERENCES

10.1 LITERATURE CITED

Birchtree Consulting Ltd. 2016. Town of Gillam Water Treatment Plant Re-Assessment – Final. Prepared for Office of Drinking Water. Winnipeg, Manitoba.

COSEWIC. 2006. Status Report on Lake Sturgeon Acipenser fulvescens (Nelson River populations). Committee on the Status of Endangered Wildlife in Canada. Available at: http://www.dfo-mpo.gc.ca/species-especes/profiles-profils/sturgeon3-esturgeon-eng.html. Accessed April 15, 2020.

Department of Fisheries and Oceans. 1995. Freshwater Intake End-of-Pipe Fish Screen Guideline. Department of Fisheries and Oceans. DFO 5080. Ottawa, Ontario.

ebird. n.d. Manitoba – Churchill and Northern Manitoba. Available at: https://ebird.org/region/CA-MB-EE?yr=all&changeDate=Set. Accessed March 24, 2020.

Environment Canada. 2011. Scientific Assessment to Support the Identification of Critical Habitat for Woodland Caribou (Rangifer tarandus caribou), Boreal Population, in Canada. Ottawa, ON. 115 pp plus Appendices.

Environment and Climate Change Canada. 2018. General Nesting Periods for Migratory Birds. Available at: https://www.canada.ca/en/environment-climate-change/services/avoiding-harm-migratory-birds/general-nesting-periods/nesting-periods.html. Accessed March 25, 2020.

Fisheries and Oceans Canada. 2013. Manitoba Restricted Activity Timing Windows for the Protection of Fish and Fish Habitat. Available at: https://www.dfo-mpo.gc.ca/pnw-ppe/timing-periodes/mb-eng.html. Accessed April 2, 2020.

Fisheries and Oceans Canada. 2020. Interim Code of Practice: Routine Maintenance Dredging. Available at: https://www.dfo-mpo.gc.ca/pnw-ppe/codes/dredge-drageur-eng.html. Accessed April 16, 2020.

Fox Lake Cree Nation. n.d. Fox Lake Cree Nation – The Land and The People are One. Available at: http://www.foxlakecreenation.com/about. Accessed March 24, 2020.

Government of Canada. 2019. Community Well-being Index Map – Gillam, MB. Indigenous Services Canada. Available at: https://www.sac-isc.gc.ca/SAC-ISC/CWB/index-map-en.html. Accessed March 25, 2020.

iNaturalist. n.d. Go Wild Manitoba! Manitoba Herps Atlas. Available at: https://www.inaturalist.org/projects/manitoba-herps-atlas. Accessed March 23, 2020.

Keeyask Hydropower Limited Partnership. 2012. Keeyask Project Environmental Impact Statement. Keeyask Hydropower Limited Partnership. Winnipeg, Manitoba.

http://www.dfo-mpo.gc.ca/species-especes/profiles-profils/sturgeon3-esturgeon-eng.html

http://www.dfo-mpo.gc.ca/species-especes/profiles-profils/sturgeon3-esturgeon-eng.html

https://ebird.org/region/CA-MB-EE?yr=all&changeDate=Set

https://ebird.org/region/CA-MB-EE?yr=all&changeDate=Set

https://www.canada.ca/en/environment-climate-change/services/avoiding-harm-migratory-birds/general-nesting-periods/nesting-periods.html

https://www.canada.ca/en/environment-climate-change/services/avoiding-harm-migratory-birds/general-nesting-periods/nesting-periods.html

https://www.dfo-mpo.gc.ca/pnw-ppe/timing-periodes/mb-eng.html

https://www.dfo-mpo.gc.ca/pnw-ppe/timing-periodes/mb-eng.html

https://www.dfo-mpo.gc.ca/pnw-ppe/codes/dredge-drageur-eng.html

http://www.foxlakecreenation.com/about

https://www.sac-isc.gc.ca/SAC-ISC/CWB/index-map-en.html

https://www.inaturalist.org/projects/manitoba-herps-atlas


References


KGS Group Consulting Engineers. 2019a. Geotechnical Investigation and Assessment Town of Gillam New Water Treatment Plant – Final. Prepared for the Town of Gillam. File No. 19-3042-001. Winnipeg, Manitoba.

KGS Group Consulting Engineers. 2019b. Fisheries and Oceans Canada Request for Review – Town of Gillam Water Treatment Plant – Design-Build Project. Prepared by KGS Group Consulting Engineers. Winnipeg, Manitoba.

Manitoba Historical Society. 2020. MHS Resources: Historic Sites of Manitoba. Available at: http://www.mhs.mb.ca/docs/sites/index.shtml. Accessed March 24, 2020.

Manitoba Infrastructure. 2017a. Provincial Highways Functional Classification Map. Available at: https://www.gov.mb.ca/mit/transpolicy/tspd/hwyclassmap.html. Accessed March 24, 2020.

Manitoba Infrastructure. 2017b. Truck Weight Limit Map and Information Guide. Available at: https://www.gov.mb.ca/mit/mcd/resources/twlm.html. Accessed March 24, 2020.

Manitoba Infrastructure and University of Manitoba Transport Information Group. 2018. Traffic on Manitoba Highways 2018. Manitoba Highway Traffic Information System. May 2019. Winnipeg, MB.

Manitoba Sport, Culture and Heritage. 2017. Manitoba Historic Places and Significant Heritage Resources. Historic Resources Branch. Available at: https://www.gov.mb.ca/chc/heritage/significant_heritage_resources.html. Accessed March 24, 2020.

Manitoba Sustainable Development. 2018. Operational Guidelines for Manitoba Water Suppliers – Dealing with Zebra Mussels in Drinking Water Systems. Office of Drinking Water. Operational Guideline ODW – OG – 27. Available at: https://www.gov.mb.ca/sd/pubs/water/drinking_water/odw_og_13.pdf. Accessed April 6, 2020.

Manitoba Sustainable Development. n.d. Control Zones in Manitoba. Environment and Biodiversity, Fish and Wildlife-Aquatic Invasive Species. Accessible at: https://www.gov.mb.ca/sd/environment_and_biodiversity/invasive_species/fish_and_wildlife/controlzone.html. Accessed March 23, 2020.

Northern Health Region. 2019a. Our Locations – Gillam. Available at: https://northernhealthregion.com/our-locations/our-locations-gillam/. Accessed March 24, 2020.

Northern Health Region. 2019b. Northern Health Region Community Health Assessment 2019. Prepared by the Northern Health Region. Flin Flon, Manitoba.

PCL Construction, Stantec Consultants Ltd., and Trotter & Morton. 2020. Design Build Services Technical Proposal – Town of Gillam Water Treatment Plant & Associated Works. January 8, 2020. Winnipeg, Manitoba.

http://www.mhs.mb.ca/docs/sites/index.shtml

https://www.gov.mb.ca/mit/transpolicy/tspd/hwyclassmap.html

https://www.gov.mb.ca/mit/mcd/resources/twlm.html

https://www.gov.mb.ca/chc/heritage/significant_heritage_resources.html

https://www.gov.mb.ca/sd/pubs/water/drinking_water/odw_og_13.pdf

https://www.gov.mb.ca/sd/environment_and_biodiversity/invasive_species/fish_and_wildlife/controlzone.html

https://www.gov.mb.ca/sd/environment_and_biodiversity/invasive_species/fish_and_wildlife/controlzone.html

https://northernhealthregion.com/our-locations/our-locations-gillam/


References


PCL Construction. 2020. Safety Measures Regarding COVID-19 HSE Memo. March 15, 2020.

PCL Winnipeg District/Northern Ontario. 2020a. What you need to know about COVID-19 Safety Talk. PCL Safety St# 9. GB/DC – March 2020.

PCL Winnipeg District/Northern Ontario. 2020b. COVID-19 Treatment, Symptoms, Causes, Prevention Safety Talk. PCL Safety St# 10. GB/DC – March 2020

Parks Canada. 1992. Canada’s Historic Places – A Federal, Provincial and Territorial Collaboration. Via Rail/Canadian National Railways Station. Available at: https://www.historicplaces.ca/en/rep-reg/place-lieu.aspx?id=4549. Accessed March 24, 2020.

Stantec Consultants Ltd. 2012. Keeyask Transmission Project – Avian Technical Report. Prepared for Manitoba Hydro. Winnipeg, Manitoba.

Statistics Canada. 2019. Census Profile, 2016 Census – Town of Gillam. Available at: https://www12.statcan.gc.ca/census-recensement/2016/dp-pd/prof/details/page.cfm?Lang=E&Geo1=CSD&Code1=4623022&Geo2=PR&Code2=46&SearchText=Gillam&SearchType=Begins&SearchPR=01&B1=All&GeoLevel=PR&GeoCode=4623022&TABID=1&type=0 Accessed March 24, 2020.

Town of Gillam. 2012. Town of Gillam Development Plan 2011-2040. By-law No. 715-2012. Prepared by Dillon Consulting for the Town of Gillam. Gillam, Manitoba.

Town of Gillam. 2014. Town of Gillam Zoning By-law 732.2014. Prepared by Dillon Consulting for the Town of Gillam. Gillam, Manitoba.

Town of Gillam. 2019a. Owner’s Statement of Requirements Rev. 0. Design/Build Services for: Town of Gillam Water Treatment Plant Project and Associated Works. Gillam, Manitoba.

Town of Gillam. 2019b. Town of Gillam Design Build WTP Project and Associated Works. Addendum 2. October 25,2019. Gillam, Manitoba.

Town of Gillam. 2020. Home-Services. Available at: http://www.townofgillam.com/p/services. Accessed March 24, 2020.

Travel Manitoba. 2015. Fishing and Hunting 2015 Guide. Manitoba Canada’s Heart Beats. Available at: https://www.travelmanitoba.com/trip-essentials/visitor-guides/. Accessed March 24, 2020.

Wildlife Resource Consulting Services MB Inc. (WRCS). 2012. Keeyask Transmission Project – Mammals Technical Report. Prepared for Manitoba Hydro. Winnipeg, Manitoba.

10.2 PERSONAL COMMUNICATION

2020a. Environmental Biologist, Stantec Consultants Ltd. Email correspondence with Environmental Planner, Stantec Consultants Ltd., Winnipeg, Manitoba, March 19, 2020.

https://www.historicplaces.ca/en/rep-reg/place-lieu.aspx?id=4549

https://www.historicplaces.ca/en/rep-reg/place-lieu.aspx?id=4549

https://www12.statcan.gc.ca/census-recensement/2016/dp-pd/prof/details/page.cfm?Lang=E&Geo1=CSD&Code1=4623022&Geo2=PR&Code2=46&SearchText=Gillam&SearchType=Begins&SearchPR=01&B1=All&GeoLevel=PR&GeoCode=4623022&TABID=1&type=0




http://www.townofgillam.com/p/services

https://www.travelmanitoba.com/trip-essentials/visitor-guides/


References


2020b. Information Manager, Manitoba Conservation Data Centre, Wildlife and Fisheries Branch, Agriculture and Resource Development. Email correspondence with Senior Environmental Planner, Stantec Consultants Ltd., Winnipeg, Manitoba, March 26, 2020.

2020c. Senior Impact Assessment Archaeologist, Historic Resources Branch, Manitoba Sport, Culture and Heritage. Email correspondence and Memorandum with Environmental Scientist, Stantec Consultants Ltd., Winnipeg, Manitoba, March 19, 2020.

2020d. Senior Project Manager, Stantec Consultants Ltd. Email correspondence with Environmental Planner, Stantec Consultants Ltd. of email correspondence between PCL Construction and Stantec Consultants Ltd., Winnipeg, Manitoba, April 9, 2020.


APPENDICES Appendix A to F

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Appendix A Figures

A.1

Appendix A FIGURES

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Major Road

Minor Road

Local Road

Watercourse

Waterbody!(

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LakeWinnipeg

LakeManitoba

LakeWinnipegosis

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Flin Flon

Notes1. Coordinate System: NAD 1983 UTM Zone 15N2. Base Data Sources: Government of Manitoba

Disclaimer: This document has been prepared based on information provided by others as cited in the Notes section. Stantec has not verified the accuracy and/or completeness of this information and shall not be responsible for anyerrors or omissions which may be incorporated herein as a result. Stantec assumes no responsibility for data supplied in electronic format, and the recipient accepts full responsibility for verifying the accuracy and completeness of thedata.

1-1a

111218740Town of GillamGillam Water Treatment Plant EAP Project

Town of Gillam,Manitoba

Prepared by ACampigotto on 2020-04-06Reviewed by BKrawchuk on 2020-04-06

Gillam Water Treatment PlantProject Location

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Notes1. Coordinate System: NAD 1983 UTM Zone 15N2. Base Data Sources: Government of Manitoba3. Orthoimagery: Microsoft screen shot reprinted with permission from Microsoft Corporation

Disclaimer: This document has been prepared based on information provided by others as cited in the Notes section. Stantec has not verified the accuracy and/or completeness of this information and shall not be responsible for any errorsor omissions which may be incorporated herein as a result. Stantec assumes no responsibility for data supplied in electronic format, and the recipient accepts full responsibility for verifying the accuracy and completeness of the data.

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Gillam Water Treatment Plant -Existing WTP Infrastructure

Figure No.

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0 100 200Metres

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Regional Assessment Area (10 km Radius)

Notes1. Coordinate System: NAD 1983 UTM Zone 15N2. Base Data Sources: Government of Manitoba3. Orthoimagery: Microsoft screen shot reprinted with permission from Microsoft Corporation

Disclaimer: This document has been prepared based on information provided by others as cited in the Notes section. Stantec has not verified the accuracy and/or completeness of this information and shall not be responsible for any errorsor omissions which may be incorporated herein as a result. Stantec assumes no responsibility for data supplied in electronic format, and the recipient accepts full responsibility for verifying the accuracy and completeness of the data.

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Gillam Water Treatment PlantAssessment Areas

Figure No.

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0 1 2Kilometres

Service Layer Credits: © 2020 Microsoft Corporation Earthstar Geographics SIO

B.1


Appendix B Plan, Agreements, FLCN Correspondence

Appendix B PLAN, AGREEMENTS, FLCN CORRESPONDENCE


Appendix C Equipment Specification

C.1

Appendix C EQUIPMENT SPECIFICATION

Note:Based on 65% DesignSubmission


Appendix D Water Conservation Report

D.1

Appendix D WATER CONSERVATION REPORT

Gillam Water Treatment Plant Water Conservation Report

Final Report

May 13, 2020

Prepared for: Manitoba Conservation and Climate Prepared by: Stantec Consulting Ltd.

GILLAM WATER TREATMENT PLANT WATER CONSERVATION REPORT

This document entitled Gillam Water Treatment Plant Water Conservation Report was prepared by Stantec Consulting Ltd. (“Stantec”) for the account of Town of Gillam (the “Client”). Any reliance on this document by any third party is strictly prohibited. The material in it reflects Stantec’s professional judgment in light of the scope, schedule and other limitations stated in the document and in the contract between Stantec and the Client. The opinions in the document are based on conditions and information existing at the time the document was published and do not take into account any subsequent changes. In preparing the document, Stantec did not verify information supplied to it by others. Any use which a third party makes of this document is the responsibility of such third party. Such third party agrees that Stantec shall not be responsible for costs or damages of any kind, if any, suffered by it or any other third party as a result of decisions made or actions taken based on this document.

Prepared by (signature)

Johanna Theroux, M.Sc.

Reviewed by (signature)

Stephen Biswanger, P.Eng.

Approved by (signature)

Carmen Anseeuw, M.Env.


Table of Contents

1.0 BACKGROUND ............................................................................................................. 1

2.0 CURRENT AND PLANNED CONSERVATION MEASURES ......................................... 1

3.0 PUBLIC AWARENESS AND PUBLIC INVOLVEMENT STRATEGIES ......................... 2

4.0 IMPLEMENTATION SCHEDULE ................................................................................... 3


1

1.0 BACKGROUND

The Town of Gillam’s existing water treatment plant (WTP) was constructed in 1968 and was upgraded in 1997. Although the WTP was originally fully automated using Programmable Logic Controllers (PLC) control and Supervisory Control and Data Acquisition (SCADA) system, the treatment process is now mainly manually controlled due to instrument and automatic valve failures. The existing WTP currently does not have the firm capacity to meet the maximum daily requirements and there is insufficient space to expand the existing WTP at its current location; therefore, a new WTP at a new location is being proposed. The proposed Gillam WTP (the Project) consists of a water treatment plant building, sourcing surface water from Stephens Lake to supply potable water to the town via two water intake pipelines. The new WTP will use a coagulation/flocculation, dissolved air floatation (DAF) process with filtration which will generate backwash waste and filter-to-waste water. The backwash and the filter-to-waste water will be discharged via a buried low-pressure sewer to the existing wastewater treatment plant.

This Water Conservation Report has been developed for the Project in accordance with the Manitoba Sustainable Development Information Bulletin – Environment Act Proposals for Municipal Water Supply Systems – Supplementary Guidelines and Information Bulleting – Water Efficiency Plans for Towns and Municipalities

2.0 CURRENT AND PLANNED CONSERVATION MEASURES

Based on the projected 20-year average potable water demand for the Project of 1,000 m3/day (365,000 m3/year), and the maximum daily water demand of 2,500 m3/day, the peak flow design is 3,750 m3/day. For this Project, water conservation measures are important to reduce the costs of water supply infrastructure and to sustain the water supply source (Stephens Lake).

Past and current conservation measures at the existing WTP consist of:

• Replacement of 100% of sewer main from 2015-2020

• Repair of all watermain leaks in the trailer park in 1996-1997

• Release of notices to residents to reduce water demand and to reduce watering of grass

• Implementation of a leak detection program in 2015 for the Town and repair/replacement of leaking sinks and toilets

• Replacement of bleeders in homes with dual water lines and heat tracing to recirculate water, resulting in a 50% decrease in houses with bleeders (as part of the water main replacement program in 2015)

• Installation of low-flow toilets in approximately 75% of Manitoba Hydro-owned housing


2

Additionally, water recycling occurs as the process, sanitary, domestic, and floor drain wastewater are conveyed to the Gillam wastewater treatment plant for eventual discharge back to Stephens Lake.

Planned conservation measures at the new WTP include:

• Replacement of an additional 10-15% of all watermains by the end of 2022.

• For the dwellings undergoing watermain replacement, replacement of bleeders in homes with dual circulation lines and heat tracing to further reduce the number of homes with bleeders.

• Use of a DAF process which will create a sludge at a rate of 4-12 m3/day. Sludge will be de-watered prior to landfilling and centrate will be conveyed to the Town of Gillam wastewater treatment plant (approximately 46 m3/day), ultimately discharging back to Stephens Lake.

• Discharge of filter-to-waste water and backwash water to the Town of Gillam wastewater treatment plant at an average rate of 106 m3/d, ultimately discharging back to Stephens Lake.

• Watermains will be installed at a depth of 1.5 m below ground surface and will be insulated to reduce the occurrence of frozen water supply pipes and the need for emergency or additional water supply measures.

• The water distribution system will be operated as a circulating loop to keep water flowing through the mains and reduce the risk of freezing. Flow meters will be maintained on the raw water and recirculation flow meter to monitor total water usage.

• The water reservoir below the WTP building will be constructed with concrete base slab/walls, waterproofed with Xypex® or approved equal product to heal concrete temperature and shrinkage cracks in order to reduce water leakage through concrete.

• The truckfill station is designed to include a pressure reducing valve and flow meter. Water haulers are required to load a card at the Town of Gillam Municipal office and then use the card at the truckfill control panel to gain access to dispensing water. The volume of water dispensed is tracked via the truck fill flow meter.

• Leak detection and repair: water use monitoring will be regularly conducted

3.0 PUBLIC AWARENESS AND PUBLIC INVOLVEMENT STRATEGIES

The Town of Gillam operates several communication methods for public awareness and/or public involvement. These communication methods are readily available to broadcast information or feedback to residents regarding community services and infrastructure or water conservation measures or programs. These methods include:

• The Town of Gillam website: http://www.townofgillam.com/ including posting of annual water system reports and Council meeting agendas and minutes.

http://www.townofgillam.com/


3

• The Town of Gillam Facebook page: https://www.facebook.com/Town-of-Gillam-191326370937082/.

• Gillam Connect, where residents choose how they want to receive community news and information, whether it be by text messages, social media, phone calls, e-mails or any combination thereof.

• Town of Gillam free mobile app, to provide residents and visitors with immediate access to local weather, Council meeting minutes, Council meeting agendas, local notices, community events, local maps, service request submissions, business directory and push notifications and emergency alerting.

4.0 IMPLEMENTATION SCHEDULE

The proposed WTP is currently in the design-build stage. Upon Project commissioning, all water conservation measures incorporated into the Project design are anticipated to be on-line. Additional conservation measures will be implemented on an as-needed basis by the Town of Gillam. A preliminary Project implementation schedule is provided in the following table.

Design and Construction Schedule

Design Development Activity Stage Date Permits and Approvals Submit Environment Act Proposal May 2020

Submit Phase 1 Permit to Construct to ODW (65% drawings and Design Brief)

May 2020

Receive Environment Act Licence June 2020

Receive Conditional Approval from ODW June 2020

Submit Phase 2 Permit to Construct to ODW (Sealed Drawings)

October 2020

Receive Permit to Construct from ODW October 2020

Design and Construction (Estimated)

Complete Detailed Design October 2020

Procurement March 2020-April 2021

Construction Start-End July 2020-October 2021

Commissioning of WTP October 2021

https://www.facebook.com/Town-of-Gillam-191326370937082/


Appendix E DFO Request for Review

E.1

Appendix E DFO REQUEST FOR REVIEW

of 12*All definitions are provided in Section G of the Guidance on Submitting a Request for Review

Request for Review Please note that Guidance on Submitting a Request for Review is available at the end of this form. This guidance explains the requirements for a Request for Review by DFO under the fish and fish habitat protection provisions of the Fisheries Act. All information requested must be provided. If you attach documents to your application with additional information, you must still provide appropriate summaries in the spaces provided on the application document or your application will be considered incomplete. A) Contact information

Name of Business/Company:

Town of Gillam

Name of Proponent:

Jackie Clayton, C.A.O.

Mailing address:

P.O. Box 100 323 Railway Avenue

City/Town:

Gillam

Province/Territory:

Manitoba

Postal Code:

R0B 0L0

Tel. No. :

204-652-3150

Fax No.:

Email:

[email protected]

Select additional contact: Contractor/Agency/Consultant (if applicable):

KGS Group Consulting Engineers c/o Shaun Moffatt

Mailing address:

3rd Floor - 865 Waverley Street

City/Town:

Winnipeg

Province/Territory:

Manitoba

Postal Code:

R3T 5P4

Tel. No. :

204-318-2054

Fax No.:

204-896-0754

Email:

[email protected]

Is the Proponent the main/primary contact? Yes No


If no, please enter information for the primary contact or any additional contact.

KGS Group Consulting Engineers

B) Description of Project

If your project has a title, please provide it.

Town of Gillam Water Treatment Plant - Design-Build Project

Is the project in response to an emergency circumstance*? Yes No

Does your project involve work in water? Yes No

If yes, is the work below the High Water Mark*? Yes No

What are you planning to do? Briefly describe all project components you are proposing in or near water. As part of the construction of a new Water Treatment Plant (WTP) for the town of Gillam Manitoba, two water intake lines will be installed into Stephens Lake to supply raw water. The water intake lines will consist of 300 mm HDPE DR11 lines, and will be installed using directional drill horizontal boring from on shore. The water intake lines will be installed beneath the lake bed and will daylight in the lake approximately 130 m from the shoreline (See Figure 02 in Attachment 1). The end of the intake will have a screen and will be covered with graded granular material. This will act as a filter, but will also address the potential future presence of zebra mussels and blue-green algae. Once installed, the water lines will supply raw water by gravity to a wet well to be constructed on shore as part of the WTP structure. Water will be pumped from the concrete wet well into the WTP for treatment and distribution. In addition, one filter-to-waste discharge line (100 mm HDPE DR11 - To be confirmed by Design-Builder) will be installed from the WTP to Stephens Lake using the same directional drilling method. The pipe will daylight in the lake approximately 100 m from the shoreline. This water line will be used to discharge water which does not meet requirements for distribution. A small area of granular material will be placed on the lake bed at the discharge pipe outlet. A 10-m wide area of trees (predominantly black spruce) will be cut between the WTP and Stephens Lake above the location of the water pipelines.

How are you planning to do it? Briefly describe the construction materials, methods and equipment that you plan to use.The intake and filter-to-waste waterlines will be installed from the south shore using directional drilling. Boring will occur >200 m from the lake, south of the WTP location. The end of the intake pipes will be screened and covered with granular material (0.3 m crushed rock, 0.3 m pea gravel, 0.3 m concrete sand). The end of pipe may either protrude above the lake bed and be covered with granular material, or alternative, an area may be excavated at the end of pipe and then be backfilled with granular material. As the project is a design-build, specific details will be determined by the contractor through detailed project design. The filter-to-waste discharge pipe will daylight in the water and protrude from the lake bottom approximately 15 cm. Granular material will be placed at these locations using a barge, divers, and a spreader pipe. The wet well will be excavated on shore as part of the WTP to pump raw water for treatment and distribution.

Include a site plan (figure/drawing) showing all project components in and near water.

Are details attached? Yes No

Identify which work categories apply to your project.Aquaculture Operations Log Handling / DumpsAquatic Vegetation Removal Log RemovalBeaches MooringsBerms Open Water DisposalBlasting / Explosives Piers


Boat Houses Riparian Vegetation RemovalBoat Launches / Ramps Seismic WorkBreakwaters Shoreline ProtectionBridges Stormwater Management FacilitiesCable Crossings Surface Water TakingCauseways Tailings Impoundment AreasCulverts Temporary StructuresDams TurbinesDewatering / Pumping Water Control StructuresDocks Water Intakes / Fish ScreensDredging / Excavation Water OutfallsDykes Watercourse RealignmentFishways / Ladders WeirsFlow Modification (hydro) WharvesGroundwater Extraction Wind Power StructuresGroynesHabitat RestorationIce Bridges

Other Please Specify

Was your project submitted for review to another federal or provincial department or agency? Yes No

If yes, indicate to whom and associated file number(s).

C) Location of the Project

Coordinates of the proposed project Latitude N Longitude W

OR UTM zone 15V ; Easting395276.70 m E

Northing6247672.71 m N

Include a map clearly indicating the location of the project as well as surrounding features.

Name of Nearest Community (City, Town, Village): Gillam

Municipality, District, Township, County, Province: Manitoba

Name of watershed (if applicable): Nelson River

Name of watercourse(s) or waterbody(ies) near the proposed project: Stephens Lake

Provide detailed directions to access the project site:

From the town of Gillam, drive north on Gillam Drive. Gillam Drive becomes Airport Road at Butnau Road. Follow Airport Drive 400 m past Butnau Road. Just prior to the airport on the south side, turn north-east on Rudy Gaider Senior Drive. Follow this road 800 m to arrive at the proposed WTP location.


D) Description of the Aquatic Environment Identify the predominant type of aquatic habitat where the project will take place.

Estuary (Estuarine)Lake (Lacustrine)On the bank/shore at the interface between land and water (Riparian)River or stream (Riverine)Salt water (Marine)Wetlands (Palustrine)

Provide a detailed description of biological and physical characteristics of the proposed project site. This description should include information on aquatic species at risk* (https://www.canada.ca/en/environment-climate-change/services/species-risk-public-registry.html), their residence* and critical habitat* if found in the area. An overview of the distribution of aquatic species at risk and the presence of their critical habitat within Canadian waters can be found here http://dfo-mpo.gc.ca/species-especes/sara-lep/map-carte/index-eng.htmlStephens Lake is a hydroelectric reservoir created when the Kettle Generating Station (GS) was constructed on the Nelson River. Substrates within the eastern portion of the lake consist primarily of fine silt depositional materials with areas of granular materials (sand/gravel) found in clay along both the north and south shorelines (Keeyask Hydropower Limited Partnership, 2012). The shoreline of Stephens Lake is dominated by sand, gravel, cobble, and areas of organic material, with much of the shoreline being prone to erosion (Keeyask Hydropower Limited Partnership, 2012). A total of 23 fish species were identified in Stephens Lake as part of the Keeyask Project Environmental Impact Statement (EIS) (Keeyask Hydropower Limited Partnership, 2012). The most abundant large bodied fish include northern pike, walleye and white sucker. Common forage species include spottail shiner, trout-perch, and rainbow smelt. Lake Sturgeon were identified in Stephens Lake however none were captured near the WTP site. None of the fish species are listed on Schedule 1 of the Species at Risk Act. Fish species present include spring (ex. northern pike, walleye), summer (ex. mooneye) and fall spawning species (ex. lake whitefish). Within the lower trophic levels, no species of conservation concern have been identified in the Stephens Lake (phytoplankton, aquatic macrophytes, zooplankton, aquatic macroinvertebrates). No aquatic species at risk are identified in the area of the proposed project area by the DFO Aquatic Species at Risk Map, or by the Manitoba Conservation Data Centre. The mean water quality values near the WTP site include a pH of 8.17, total suspended solids of 10 mg/L, total phosphorus of 0.036 mg/L, total Kjeldahl Nitrogen of 0.4 mg/L, specific conductance of 252 uS/cm, and dissolved oxygen of 11.77 mg/L (Keeyask Hydropower Limited Partnership, 2012). On the basis of total phosphorus, Stephens Lake ranges from mesotrophic to eutrophic. As noted in the Keeyask Project EIS, the aquatic environment in Stephens Lake is not unique from a biodiversity and conservation perspective. The aquatic environment is similar to much of the northern boreal forest of Manitoba, Ontario and Quebec.

Include representative photos of affected area (including upstream and downstream area) and clearly identify the location of the project.

E) Potential Effects of the Proposed ProjectHave you reviewed the Pathways of Effects (PoE) diagrams (http://www.dfo-mpo.gc.ca/pnw-ppe/pathways-sequences/index-eng.html) that describe the type of cause-effect relationships that apply to your project?

Yes No

If yes, select the PoEs that apply to your project.Addition or removal of aquatic vegetation Placement of material or structures in waterChange in timing, duration and frequency of flow Riparian PlantingCleaning or maintenance of bridges or other structures Streamside livestock grazingDredging Structure removal


Excavation Use of explosivesFish passage issues Use of industrial equipmentGrading Vegetation ClearingMarine seismic surveys Wastewater managementOrganic debris management Water extractionPlacement of marine finfish aquaculture site

Will there be changes (i.e., alteration) in the fish habitat*? Yes No Unknown

If yes, provide a description.Construction of the water intake will alter the fish habitat within the limits of the placed granular material (whether the area is excavated or not). If the area is excavated, the granular surface will be in line with the surrounding sediments. If the area is not excavated, a mound of approximately 1 m of granular material will be present on the lake bed. The filter-to-waste discharge pipe will also have placed granular material and will therefore also result in alteration of fish habitat. While the material placement at the intake and discharge pipes will result in alteration of fish habitat, the area of disturbance is relatively small in comparison to the size of lake and expected ubiquity of sediments.

Is there likely to be a harmful alteration, disruption or destruction of habitat used by fish? Yes No Unknown

Is there likely to be destruction or loss of habitat used by fish? Yes No Unknown

What is the footprint (area in square meters) of your project that will take place below the high water mark*?Granular materials will be placed over an area of up to 50 m2 at the end of the raw water intake pipes. A small area of granular material would also be place at the outlet of the filter-to-waste discharge line (approximately 1 m2). The remainder of the water pipelines will be beneath the sediment.

Is your project likely to change water flows or water levels? Yes No Unknown

If your project includes withdrawing water, provide source, volume, rate and duration.Raw water is withdrawn from Lake Stephens at an average withdrawal rate of approximately 1,000 m3/day (365,000 m3/year). Maximum daily demand is anticipated to be 2,550 m3/day, while peak flow design is 3,750 m3/day.

If your project includes a water control structure, provide the % of flow reduction.N/A

If your project includes discharge of water, provide source, volume and rate.A filter-to-waste discharge line will discharge rejected water from the WTP to Stephens Lake. The filter-to-waste water is the water that has received treatment through coagulation-flocculation and dissolved air flotation (DAF) followed by granular filtration, but has not met the turbidity requirement to be sent to the distribution system. The turbidity of discharged water would range from 10 NTU down to about 0.1 NTU, which is lower than the average raw water quality in Stephens Lake which is about 20 NTU. This will therefore be adding cleaner water back into the lake than was taken out. The average filter-to-waste discharge flow is 11.6 L/s for about 30 minutes per day (21 m3/d). The estimated maximum filter-to-waste discharge flow is 11.6 L/s for about 75 minutes per day (52 m3/d). Additionally, the water intake lines will occasionally be backwashed to clear sediment accumulation near the inlet.

Will your project cause death of fish? Yes No Unknown

If yes, how many fish will be killed (for multi-year project, provide average)? What species and lifestages?

N/A

What is the time frame of your project?

The construction will start on 07/15/2021 and end by 08/31/2021

If applicable, the operation will start on 11/15/2021 and end by on-going


If applicable, provide schedule for the maintenance

The water intake lines will occasionally (approximately 1x/week) be backwashed to clear sediment accumulation near the inlet.

If applicable, provide schedule for decommissioning

The new plant will accommodate a projected twenty (20) year (2040) service population of 1,650 water users with the ability to expand beyond this capacity if future need arises with no plans to be decommissioned.

Are there additional effects to fish and fish habitat that will occur outside of the time periods identified above? Yes No

(If yes, provide details)

Can you follow appropriate Timing Windows (http://www.dfo-mpo.gc.ca/pnw-ppe/timing-periodes/index-eng.html) for all your project activities below the High Water Mark*?

Yes No

(If no, provide explanations.)

Have you considered and incorporated all options for redesigning and relocating your project to avoid negative effects to fish and fish habitat?Yes No

If yes, describe.Conceptual options considered include groundwater supply sources, installation of a wet well pumping system, and installation of a conventional infiltration gallery system. The current project design was deemed the most suitable for the Gillam WTP.

Have you consulted DFO’s Fish and Fish Habitat Protection Measures Habitat (http://www.dfo-mpo.gc.ca/pnw-ppe/measures-mesures/index- eng.html) to determine which measures apply to your project?

Yes No

Will you be incorporating applicable measures into your project? Yes No

If yes, identify which ones. If No, identify which ones and provide reasons.PREVENT THE DEATH OF FISH - In-water work is scheduled to respect timing windows to protect fish, fish eggs, juveniles. MAINTAIN FISH PASSAGE - The project will not change flows or water levels and will not obstruct or interfere with the movement and migration of fish. ENSURE PROPER SEDIMENT CONTROL - An erosion and sediment control plan will be developed and implemented; any excavated material will be disposed of and stabilized above the top of bank; work will be scheduled to avoid weather conditions that may result in high flow volumes and/or increased erosion and sedimentation; monitoring the river for signs of increased sedimentation during construction and taking corrective actions as required; and operating machines on land in stable dry areas. PREVENT ENTRY OF DELETERIOUS SUBSTANCES IN WATER - Depositing deleterious substances in the river will be avoided; a spill response plan will be developed and implemented; an emergency spill kit will be kept on site; work will be stopped and deleterious substances contained to prevent dispersal if spilled; spills of any oil, fuel or other deleterious material will be reported; spills will be cleaned-up and appropriately disposed; machinery on-site will be maintained in a clean condition and free of fluid leaks; washing, refueling and servicing of machinery and fuel storage will be a minimum of 100 m away from the river.

Have you considered whether DFO standards and codes of practice apply to your project? No Yes

If Yes, include a list.

Interim code of practice: End-of-pipe fish protection screens for small water intakes in freshwater Interim code of practice: Routine maintenance dredging

Have you considered other avoidance and mitigation measures? No Yes


If Yes, include a list.

Are there any relevant measures that you are unable to incorporate? Yes No

(If yes, identify which ones.)

What harmful effects to fish and fish habitat do you foresee after taking into account the avoidance and mitigation measures described above? Approximately 51 m2 of fish habitat will be permanently altered by the placement of granular material.

Do these include effects on aquatic species at risk*? Yes No

If yes, please describe, including how many individuals will be harmed, harassed, or otherwise affected by the project, and how?

Do these include effects on areas identified as their residence or critical habitat? Yes No

If yes, please describe

Are there any aquatic invasive species in the vicinity of your project area? Yes No

(If yes, identify which ones.)

Does your project aim to, or will it be likely to, effect any of these aquatic invasive species? Yes No

If yes, how?

l • I Fisheries and Oceans Canada

F) Signature

Peches et Oceans Canada Canada

I, lshaun Moffatt I (print name) certify that the information given on this form is to the best of my knowledge, correct and completed.

!1111012019 Date

Information about the above-noted proposed work or undertaking is collected by DFO under the authority of the Fisheries Act for the purpose of administering the Fish and Fish Habitat protection provisions of the Fisheries Act. Personal information will be protected under the provisions of the Privacy Act and will be stored in the Personal Information Bank DFO-PPU-680. Under the Privacy Act, Individuals have a right to, and on request shall be given access to any personal information about them contained in a personal information bank. Instructions for obtaining personal information are contained in the Government of Canada's Info Source publications available at www.infosource.gc.ca or in Government of Canada offices. Information other than "personal" information may be accessible or protected as required by the provision of the Access to Information Act.

*All definitions are provided in Section G of the Guidance on Submitting a Request for Review

• All definitions are provided in Section G of the Guidance on Submittinq a Request for Review P;:,n,, R nf 1?


Appendix F Heritage Correspondence

F.1

Appendix F HERITAGE CORRESPONDENCE

Stantec Consulting Ltd. 500–311 Portage Avenue, Winnipeg MB R3B 2B9

March 16, 2020 File: 111218740

Attention: Historic Resources Branch Main Floor, 213 Notre Dame Avenue Winnipeg, MB, R3B 1N3

Dear Historic Resources Branch,

Reference: Heritage Screening for Construction of the Gillam Water Treatment Plant Project

Stantec Consulting Ltd. (Stantec) is providing environmental services to the Town of Gillam for the design and permitting of a new drinking water treatment plant and associated works located on Rudy Gaider Senior Drive. These works include a new water intake in Stephens Lake with water and wastewater piping infrastructure from the proposed water treatment plant to the Airport Road and Churchill Drive intersection. The water treatment plant is located in the northeastern part of legal land description 4-5407 on property that is owned by the Town of Gillam (See Appendix A, Figure 01).

The proposed project will involve the following components:

• installation of a new water intake structure • 300 mm HDPE water intake line from Stephens Lake to a wet well outside of the proposed water

treatment plant • construction of a new 36 m x 24.8 m WTP building and access road • installation of a 100 mm discharge line from the proposed water treatment plant to Stephens Lake • installation of a 300 mm treated water line installed at a minimum depth of 1.5 m on the west side of

Rudy Gaider Senior Drive/ Airport Road to the Chuchill Drive intersection. • installation of a 100 mm low pressure sewer line installed at a minimum depth of 2.7 m on the east side

of Rudy Gaider Senior Drive/Airport Road to the Chuchill Drive intersection. The total length of piping from the proposed water treatment plant to the Churchill Drive intersection is approximately 1.5 km and is primarily being installed within and up to 13 m adjacent to the right of way, by open trench and by horizontal directional drilling.

Stantec is requesting a review of the Project by the Historic Resources Branch for any potential heritage concerns with the Project.

Regards,

Stantec Consulting Ltd.

Johanna Theroux M.Sc

March 16, 2020 Historic Resources Branch Page 2 of 2

Reference: Heritage Screening for Construction of the Gillam Water Treatment Plant Project

Environmental Scientist Phone: 204-928-8699 [email protected]

Attachment: Appendix A: Drawings c. Carmen Anseeuw (Stantec)

Appendix A

METRIC

Birchtree Consulting Ltd.

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HYDRO

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HYDRO

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#130B

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#127

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#123

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#117

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#105

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#122

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#116

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#110

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0

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50.0

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100.0

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200.0

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150.0

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250.0m

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SCALE:

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1:6000m (11"x17")

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WHOLE NUMBERS INDICATE MILLIMETRES DECIMALIZED NUMBERS INDICATE METRES

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AIRPORT ROAD

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GILLAM DRIVE NORTH

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CHURCHILL DRIVE

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RAILWAY AVENUE

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EXISTING WATER INTAKE BUILDING

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AIRPORT

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EXISTING RAW WATER SUPPLY LINE

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PROPOSED RESERVOIR/WTP

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NISKU BAY

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BUTTON AVENUE

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THOMPSON CRESCENT

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MATTONNABEE AVENUE

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STEPHENS LAKE

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LEGEND EXISTING RAW WATER PROPOSED RAW WATER LINE PROPOSED TREATED SUPPLY & RECIRCULATION WATER PROPOSED LOW PRESSURE SEWER NEW FILTER-TO-WASTE DISCHARGE LINE NEW WTP PROPERTY LINE STREET LIGHT EXISTING WWS MANHOLE

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PR 280

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EXISTING RAW WATER SUPPLY LINE

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PROPOSED 300 TREATED WATERSUPPLY & RECIRCULATION LINES

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PROPOSED 100 OR 150 LOW PRESSURE SEWER

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PROPOSED DUAL 300 HDPE DR11INTAKE FROM STEPHENS LAKE

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PROPOSED 100 FILTER-TO-WASTE DISCHARGE TO STEPHENS LAKE

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RUDY GAIDER SENIOR DRIVE

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PROPOSED 300 TREATED WATERSUPPLY & RECIRCULATION LINES TO BE CONNECTED TO EX SUPPLY & RECIRCULATION LINE

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PROPOSED 100 LOWPRESSURE SEWER TO BE CONNECTED TO EX MH42

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MH42

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BUTNAU ROAD

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RADISSON ROAD

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EXISTING WATER TREATMENT PLANT

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REVISIONS

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DESCRIPTION

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APPROVED

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Approved

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Design

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SIZE

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DWG NO.

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PROJECT

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NOT TO BE USED FOR CONSTRUCTION

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PRELIMINARY

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Filename: U:\FMS\19-3042-001\19-3042-001_FALL - Tab:F01 Plotted By: AKiayee 19/09/16 [Mon 5:17pm]U:\FMS\19-3042-001\19-3042-001_FALL - Tab:F01 Plotted By: AKiayee 19/09/16 [Mon 5:17pm] - Tab:F01 Plotted By: AKiayee 19/09/16 [Mon 5:17pm]F01 Plotted By: AKiayee 19/09/16 [Mon 5:17pm]

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AS NOTED

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FIGURE 01

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22"x34"

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OVERALL SITE PLAN

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MUNICIPAL

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TOWN OF GILLAM

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WATER TREATMENT PLANT DESIGN-BUILD PROJECT

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RJH

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19/07/12

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ISSUED FOR REVIEW

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A

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WET WELL

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RESIDENCE

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HIGHWAY CROSSING AS PER MANITOBA INFRASTRUCTURE

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2x150 WATER SERVICECONNECTION STUBS

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100 LPS SERVICECONNECTION STUB C/W VALVE

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2x25 WATER SERVICECONNECTION STUBS

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75 LPS SERVICE CONNECTIONSTUB C/W VALVE

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EXISTING DRAINAGE CHANNEL

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EXISTING DRAINAGE CHANNEL

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GOVERNMENT ROAD ALLOWANCE

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BM

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19/09/17

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ISSUED FOR RFP

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DATE: 2020-03-19 TO: Johanna THEROUX

Environmental Scientist Stantec 500-311 Portage Avenue Winnipeg, MB R3B 2B9

FROM: Suyoko TSUKAMOTO Senior Impact Assessment Archaeologist Historic Resources Branch Main Floor – 213 Notre Dame Avenue Winnipeg, Manitoba R3B 1N3

CC. Perry BLOMQUIST Impact Assessment Archaeologist Historic Resources Branch

T: F: e:

(204) 945-3893 (204) 948-2384 [email protected]

SUBJECT: Gillam WTP heritage screening AAS File No. AAS-19-15667

Concerns Further to your e-mail, regarding the above noted heritage screening, the Historic Resources Branch has examined the locations in conjunction with Branch records for areas of potential concern. The proposed intake system for the new reservoir is situated on Lake Stephens and Nelson River, the latter which served as a major transportation corridor for Past Peoples. The location is an area that has not been formally surveyed, bounded by an otherwise extensive distribution of archaeological sites. These factors, to name a few, suggest that any future planned development within the area has the potential to impact heritage resources; therefore, the Historic Resources Branch has concerns. Under Section 12(2) of The Heritage Resources Act, if the Minister of Sport, Culture and Heritage has reason to believe that heritage resources or human remains are known, or thought likely to be present, on lands that are to be developed, then the owner/developer is required to conduct at his/her own expense, a heritage resource impact assessment (HRIA) and mitigation, if necessary, prior to the project’s start. The developer must contract a qualified archaeological consultant to conduct a Heritage Resources Impact assessment (HRIA) of the proposed development location, in order to identify and assess any heritage resources that may be negatively impacted by development. If desirable, the Branch will work with the developer/land owners and its consultant to draw up terms of reference for this project. If you have any futher questions or comments, please feel free to contact the Branch as above.

Manitoba Historic Resources Branch Archaeological Assessment Services

town of gillam water treatment · this environment act proposal has been prepared by stantec...

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