fy21 consolidated projects
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Consolidated Canal Rehabilitation Program (CCRP)CCRP #10 – Portions of L-19, L-21 & L-23 CanalsRFB No. 20-10166P.10
Megan Hoffman, Project ManagerDecember 16, 2020Agenda Item #8
FY21 Consolidated Projects
CCRP 10~3.1 miles Est, $201,580; 6 monthsIncludes segments of L‐19, L‐21 & L‐23 canals, east of E‐3.
CCRP 13~3.2 miles Est, $203,500; 3 monthsIncludes segments of L‐5, L‐6 & L‐7 canals, between SR‐7 & FL Turnpike.
CCRP 11~4.2 miles Est, $270,700; 5 monthsIncludes segments of L‐11, L‐12, L‐13, E‐2 ½‐2 & E‐2 ½‐3 canals, east of FL Turnpike.
CCRP 12~3.2 miles Est, $208,700; 4 monthsIncludes segments of L‐31, L‐32, L‐33 & E‐3 ½‐4 canals, east of E‐3.
CCRP 14~2.9 miles Est, $188,000; 2 monthsIncludes segments of L‐11, L‐13, L‐14 & E‐2W canals, between SR‐7 & FL Turnpike.
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CCRP #10 – January 2021
Proposed Timeline
October 14 - Board authorization to advertise
October 25 - Advertise RFB in Sun Sentinel
December 3 – Bid Opening
December 16 – Board approval to award
January 25 – Work begins
August 2 – Final Completion
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Bid Results
Company Name Total Base Bid
Arbor Tree & Land, Inc. (ATL Diversified) $268,000.00*
RPF Emergency Services, LLC $279,915.12
*Apparent Low Bidder
Staff Recommendation
Approval to award bid to Arbor Tree & Land, Inc. (ATL) in the amount of $268,000 and authorization to enter into a Contract to clear portions of the L-19, L-21 and L-23 Canals
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Approval of L-34 Canal Relocation and Memorandum of Agreement with FDOT for Atlantic Avenue Roadway WideningFrom East of SR-7 to West of Lyons Road
(RI-19-0041)
David Bends, P.S.M., Project SurveyorGoverning Board Meeting – December 16, 2020Agenda Item #9
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Background
On July 12, 2005, the Board approved the relocation of the L-34 Canal from SR-7 to Florida’s Turnpike, however, only the section from west of Lyons Road to Florida’s Turnpike was relocated
LWDD owns and operates the L-34 Canal which consists of fee simple right-of-way approximately 37’ to 40’ wide from SR-7 to west of Lyons Road
Proposal includes exchange ~40’ fee simple right-of-way for an 87’ exclusive easement, as well as 15’ embankment easement
LWDD and FDOT wish to enter into a Memorandum of Agreement to coordinate canal relocation sequencing and acquisition/transfer of right-of-way
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Agreement
FDOT shall acquire the right-of-way for the canal relocation at its own expense
FDOT shall be responsible for all costs associated with construction of roadway improvements and relocation of L-34 Canal
LWDD shall transfer property rights associated with the L-34 Canal to FDOT prior to right-of-way certification for construction, which is scheduled for March 2023
FDOT shall grant back to LWDD a temporary exclusive maintenance easement from the date of the canal right-of-way transfer to FDOT until construction begins
LWDD shall assume responsibility for maintenance of and liability for the area within the temporary maintenance easement until said easement expires, which will be when FDOT issues the notice to proceed to the construction contractor
The Contractor shall be responsible to maintain the existing canal section and drainage canal flow at all times
Agreement
FDOT shall grant access to LWDD to maintain the canal in the event an emergency
FDOT will include in the construction contract, the proposed permit to be issued by LWDD which contains conditions set forth in the agreement
FDOT shall retain complete ownership and control of all acquired right-of-way during the construction of the Project
FDOT shall execute conveyance and other documentation to transfer ownership of the relocated canal and the new canal right-of-way to LWDD upon the completion of construction
LWDD shall assume responsibility for maintenance of the relocated canal and canal right-of-way upon the transfer of ownership from FDOT to LWDD
The project shall be complete within 10 years of MOA execution, or as extended by the parties
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Staff Recommendation
Approval of the Relocation of the L-34 Canal
Approval to enter into a Memorandum of Agreement with Florida Department of Transportation to coordinate acquisition and transfer of right-of-way and canal relocation sequencing
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Boca Raton Municipal Golf Course RedevelopmentExtension of Board Approval to Purchase the L-44 Canal EasementGL HOMESLWDD Project No. RI-18-0028
David Bends, PSM, Project SurveyorBoard Meeting, December 16, 2020Agenda Item #10
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Background
GL Homes entered into contract with the City of Boca Raton to purchase the City’s municipal golf course with the intention of redeveloping the parcel into a subdivision for single family homes
On July 11, 2018, the Board approved to declare a portion of the L-44 Canal Easement recorded in ORB 5395, Page 1809 surplus and sell at fair market value
• Appraised FMV – $95,953/acre x 2.402 acres = $230,000
The surplus easement is entirely within the development parcel and not contiguous (touching) to adjacent property owners; therefore, no requirement to advertise the sale of surplus lands
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Background
On June 5, 2019, LWDD received a request from GL Homes for an extension of board approval to purchase the L-44 Canal Easement
GL Homes contract closing with the City of Boca Raton is being pushing back by a least one-year because the City was delayed in the process of opening an alternative golf course to the public
On June 7, 2019, Tommy Strowd, Executive Director, granted GL Homes a 90-day extension pursuant to district policy
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Staff Recommendation
Extend Board approval of GL Homes purchase of the L-44 Canal easement until December 31, 2021
Subject to:• An updated appraisal within 6 months of purchase date • Property owner conveying an exclusive easement deed to the District
over the south 10 feet of north 50 feet of NE ¼ of Section 12/47/42, lying west of the Turnpike; together with the south 10 feet of the north 40 feet of Tracts 1 through 3 for the L-44 Canal as shown in the attached exhibit
• Property owner realigning the L-44 Canal to the new design section and providing a new culvert into the E-2W Canal
• Property owner conveying an exclusive easement deed to the District over the east 10 feet of the development parcel for the E-2W Canal
• Sketch of Descriptions, Certification of Title, legal and recording fees, approval of all plans by LWDD staff and District Operating Policies
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Control Structure 9 Upgrade OptionsAnthony LasCasas P.E.Director of Operations & Maintenance
Board Meeting – December 16, 2020Agenda Item #11
Background
In 2019, LWDD solicited bid for replacement of Control Structure 9
Replacement of structure costs significantly higher than anticipated - $10.5M
Due to expected budget constraints, Board did not award bid and instructed staff to evaluate alternatives to rehabilitate structure to extend useful life• $550,000 budgeted in Fiscal Year 2021
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Control Structure 9 Condition Survey
Water Control Gates
Trash Rakes & Stop Logs
Structural Condition
Water Supply Pumps
Electrical System
Site Access
SCADA
Lateral Seepage
Hydraulics
Overhead Power
Control Structure 9Evaluation
Facility was reviewed under 3 scenarios
• Minor Repairs & Restore to Original• Returns Structure to original design condition
• Remediate & Upgrade the Existing Facility• Rehabilitate existing structure in-place, replacing the
existing buildings with a single control house, and installing SCADA to improve function and reliability
• New Construction• Remove existing structure, gates, pumps and buildings
and reconstruct structure ~250 east of existing
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Control Structure 9 Condition Survey Water Control Gates
Water Control Gates• Originally installed in 1982
• Refurbished in 2013
• North gate repairs in 2016
• Currently functioning and are not immediate concern
• Showing signs of corrosion and pitting; should be scheduled for replacement within next 5 years
Remediate:• Estimated cost of replacement
$130,000* (Waterman gates)
*Does not include LWDD labor cost
Control Structure 9 Condition SurveyTrash Grate & Stop Log Rails
Trash Rakes & Stop Log Rails• Originally installed - Rebar poured into
pump basin in 1982• Severely corroded and continue to be a
maintenance concern• Requires staff to manually remove debris
from boats, inside the outfall bays • Stop log rails are severely corroded and
unusable
Remediate:• Estimated cost to replace existing grates
$10,000*• Remove and replace stop log rails &
fabricate custom stop logs; estimated cost $40,000*
*Does not include LWDD labor cost
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Control Structure 9 Condition Survey Structural
Structural Condition• Originally constructed - 1982• Refurbished - None known• Water control structure remains in fair
condition; however, sky lights and roof tie downs do not meet current hurricane standards and some concrete repairs are necessary
Repair:• Estimated cost $40,000*• Replace sky lights; hurricane straps;
catwalk and railings• Repair concrete spalling; fencing
Remediate:• Estimated cost $125,000• Remove existing pump houses and
replace with single structure; install emergency site lighting and relocate power (does not include SCADA installation)
*Does not include LWDD labor cost
Control Structure 9 Condition Survey Water Supply Pumps
Water Supply Pumps• Originally installed in 1982• Refurbished in 2012• Rated Pump Capacity
• South pump- Rated- 15k-18k GPMActual- 14901 GPM (2/19)
• North Pump - N/A inoperable
• South pump has several leaks throughout the casing and significant impellor & shaft wear
Repair:• Repair existing pump(s); estimated
cost $40,000
Remediate: • Remove & replace existing pumps
with a single 150 hp 26,000 GPM submersible pump and casing; estimated cost $150,000
*Does not incude LWDD labor costs
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Control Structure 9 Condition Survey Electrical
Electrical System• Originally installed in 1982• Never had full refurbishment or
replacement as a system• Electrical components have been
maintained and replaced as needed to resolve failures; however, system is 38 years old and continues to present a reliability concern
Replace: • Estimated cost $40,000
Remediate:• Install backup generator, ATS and
propane tank; estimated cost $60,000
*Does not include LWDD labor cost
Control Structure 9 Condition Survey Remote Monitoring & SCADA
No SCADA exists on structure• Local control only with no
transmission capabilities
• No backup power
Remediate:
• Install new SCADA telemetry system including upstream and downstream stilling wells, piers and telemetry antenna tower
• Estimated cost $250,000
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Control Structure 9 Condition Survey Overhead Power
Presence of overhead power lines remains a concern• Permitted in 2002• Hazards when working/servicing on
gates or pumps• Problem in an emergency where
equipment access is necessary• Maintenance request FPL is
requesting 7-day notice emergency request as soon as practical (max 24 hours)
• Currently has two isolation switches
Removal of existing pump house mitigates need to relocate overhead power lines
Remediate: • Estimated cost to relocate overhead
lines - TBD
Control Structure 9 Condition Survey Lateral Seepage & Uplift
Lateral seepage of the structure remains a potential concern
6 of 8 pressure relief lines are plugged
Rubble Rip Rap has sloughed off
Uplift factor of safety just under acceptable standards
Remediate:• Analysis of geotechnical conditions
recommends repair of pressure relief drains, repair of rubble rip rap and future monitoring of site for seepage or uplift. Estimated cost of repairs $150,000
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Control Structure 9 Condition Survey Hydraulics
Configuration of existing structure would not facilitate modifications to the hydraulic conveyance without significant costs
Findings of Engineering Study• While discharge reaches supercritical
flow and a hydraulic jump likely occurs under the bridge, condition is not by itself creating an issue
• In addition, structure was constructed to maximize depth of flow and matches bottom of the channel
• Therefore, installation of any hydraulic measures to improve flow and remove supercritical flow condition would be costly and would effectively reduce flow capacity
Control Structure 9 Condition Survey Drop Curb
Existing structure does not have drop curbs or drive aprons• Presents a safety concern
as Lawrence Road is a four-lane collector creating a traffic safety concern
• 6” curb jump places additional wear and tear on vehicles and hinders heavy equipment access
Repair: • Replace with proper drop
curbs and apron; estimated cost $40,000
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Option #1Maintenance Repairs Only
Estimated Cost $575,000; projected life 1-3 years Work would include:
• Replacement of Water Control Gates, Trash Rakes, Stop Log Rails
• Repair of Existing Pumphouses & Appurtenances, South Pump, Existing Electrical, Pressure Relief Lines, Rubble Rip Rap
• Installation of Drop Curbs Pros
• Low cost• Short time frame (within current Fiscal Year)
Cons• Does not fully address lateral seepage concerns• Does not fully address overhead power lines• Does not address hydraulic constraints• Does not address trash rake maintenance & Access• Leaves station with Local Control Only
Option #2Repair & Remediate Existing Structure
Estimated Cost $1,300,000; projected life 15+ years
Work would include: • Replacement of Water Control Gates, Trash Rakes, Stop Log Rails
• Removal of Pumphouses and Replacement of Pump with New Submersible
• Repair of Electrical, Pressure Relief Lines, Rubble Rip Rap
• Installation of SCADA system including stilling wells and antenna; Stand-by Generator & Propane Tank; Drop Curbs
Pros• Moderate cost; 1-2 years to complete improvements
• Extends useful life into the foreseeable future
• Significantly improves reliability of facility including both water control and water supply
• Integrates facility with existing SCADA system and allows for remote monitoring and operation
• Provides opportunity for adjacent neighborhood to transition from septic tanks to city sewer
Cons• Does not fully address concerns with lateral seepage; overhead power lines; and
hydraulic constraints
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Option #3Replace / Relocated Structure
Estimated Cost - $10,500,000 Work would include
• Removing the existing structure, including gates, pumps and buildings• Construction of a new structure ~250 east of the existing
Pros• Extends life to the foreseeable future• Addresses potential lateral seepage concerns• Addresses overhead power lines• Addresses hydraulic constraints• Addresses trash rake maintenance & access• Significantly improves reliability of the facility including both water control and
water supply• Integrates facility with existing SCADA system and allows for remote
monitoring and operation Cons
• High cost• 2-3 year construction schedule
Control Structure 9Summary of Alternatives
Restore to Original (Est. 1-3 years)• Estimated Cost $575,000
Remediate & Upgrade Existing Facility (Est. 15+ years)• Estimated Costs $1,300,000
Construct New Structure (Est 30+ years)• Estimated Costs $10,500,000
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