City of Auburn, Alabama:

Outfall Reconnaissance Inventory Program

Prepared forAlabama Water Resources ConferenceSeptember 4-6, 2013Orange Beach, Alabama

City of Auburn, Alabama:

Outfall Reconnaissance Inventory Program

Presentation Outline

I. Introduction & Background

II. What is an Outfall Reconnaissance Inventory?

III. Planning, Prioritizing, and Managing Field Investigations

IV.Tracking and Documentation

V. Data Review and Analysis

VI.Summary and Conclusions

Introduction and Background

Location

Population Served – Around 60,000

Phase II Coverage – 60+/- Sq. Miles

Storm Sewer – 100+ Miles of Pipe

Receiving Waters – 450 Miles of Stream

Lee County

Legend

Lee County

Auburn University Phase II

Tallapoosa River Basin

City of Auburn Phase II

Annexed

ACT99_577

Annexed

ChattahoocheeTallapoosa

What is an Outfall Reconnaissance Inventory?

• Involves – Field Location– Documentation– Evaluation– Mapping – Characterization

of all permitted and unpermitted discharges to either the MS4 or its receiving waters.

• City of Auburn * This includes identification and inventory of other WQ related concerns

Outfall Reconnaissance Inventory

Iron Floc Anyone?

An Outfall Reconnaissance Inventory Should be Done to:

• Meet/Exceed IDDE component of MS4 permit **Can be Low Cost

• Familiarization of jurisdiction• ID other concerns (erosion etc.)• ID maintenance concerns• Assess All SS aerial crossings• ID BMP opportunities (restoration)• Most importantly - to gain intimate

knowledge of your system

An Outfall Reconnaissance Inventory Should be Completed:

• ASAP

• Reevaluate every 5 years or sooner

• Should arguably be done prior to implementation of ANY on the ground BMP other than education and outreach

• Should be performed in dry conditions, preferably at least 72-hours after any significant storm event

Planning, Prioritizing, and Managing Field Investigations

How to Plan for Outfall Reconnaissance

• Gather all existing information on storm-sewer system

• Gather all cartographic data (GIS if available)

• Identify all TMDL or 303(d) listed waters• Delineate receiving basins into

manageable units• Prioritize your schedule according to

variables of impairment and/or local knowledge

Know Your Limits.Jurisdictional Limits That Is!

SIMPLE ADVANCED

Gather Available Data

Prioritization and Scheduling• Watersheds with Approved

TMDL’s

• Watersheds with 303(d) Listed Waters

• Source Water Protection Area (Drinking Water Source)

• Watersheds Designated as Critical Habitat

• Outstanding Water Resources

A Method of Prioritization

9

10

7

6

53

4

2 1

8

Schedule by Density  BASIN 1 LANDCOVER   Basin 1 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 228.51 28.56 744.20 324.07 138.06 1050.51 38.66 2552.57 440.00 0.17Percent Area 8.95% 1.12% 29.15% 12.70% 5.41% 41.15% 1.51% 100.00%    BASIN 2 LANDCOVER   Basin 2 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 12.35 14.41 449.79 180.34 35.34 198.45 0.96 891.64 96.00 0.11Percent Area 1.38% 1.62% 50.45% 20.23% 3.96% 22.26% 0.11% 100.00%       BASIN 3 LANDCOVER Basin 3 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 93.81 14.52 403.45 168.79 87.33 406.79 18.81 1193.50 173.00 0.14Percent Area 7.86% 1.22% 33.80% 14.14% 7.32% 34.08% 1.58% 100.00%       BASIN 4 LANDCOVER   Basin 4 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 276.39 46.02 1712.07 839.67 202.62 625.25 96.01 3798.03 58.00 0.02Percent Area 7.28% 1.21% 45.08% 22.11% 5.33% 16.46% 2.53% 100.00%       BASIN 5 LANDCOVER   Basin 5 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 158.63 39.76 945.64 688.91 247.75 347.26 67.46 2495.41 63.00 0.03Percent Area 6.36% 1.59% 37.90% 27.61% 9.93% 13.92% 2.70% 100.00%       BASIN 6 LANDCOVER   Basin 6 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 104.20 30.16 830.15 1304.47 505.67 364.72 12.26 3151.63 52.00 0.02Percent Area 3.31% 0.96% 26.34% 41.39% 16.04% 11.57% 0.39% 100.00%       BASIN 7 LANDCOVER   Basin 7 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 680.11 83.22 2170.83 1175.72 495.01 500.26 162.50 5267.64 0.00 0.00Percent Area 12.91% 1.58% 41.21% 22.32% 9.40% 9.50% 3.08% 100.00%       BASIN 8 LANDCOVER   Basin 8 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 48.54 3.73 198.65 169.43 12.91 21.98 1.19 456.43 4.00 0.01Percent Area 10.64% 0.82% 43.52% 37.12% 2.83% 4.81% 0.26% 100.00%       BASIN 9 LANDCOVER   Basin 9 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 2448.06 299.80 9406.59 8070.19 2059.94 927.00 148.23 23359.80 0.00 0.00Percent Area 10.48% 1.28% 40.27% 34.55% 8.82% 3.97% 0.63% 100.00%       BASIN 10 LANDCOVER   Basin 10 Outfalls  Ag/Pasture Ag/Tilled Coniferous Deciduous Open Urban Water Total Headwalls Headwalls/AcreAcreage 290.46 29.90 2345.14 1221.96 682.39 279.51 32.47 4881.83 21.00 0.00Percent Area 5.95% 0.61% 48.04% 25.03% 13.98% 5.73% 0.67% 100.00%     

% URBAN LC HEADWALLS per ACRE

Schedule Overlay

Start Here!

Getting Started – It Takes Two

SAFETY IN NUMBERS

Necessary EquipmentField Vest

Spray PaintField Book

Tape MeasurerCameraMachete

MapORI Field Sheets

BootsSunscreenOptional

GPSPocket Colorimeter

Snake ChapsPVC Caps

Use the IDDE Guidance Manual

How to Manage Your Data

Information Tracking

**A Product of an Interdepartmental Collaboration Between City of Auburn Information Technology and

Water Resource Management Departments

Click Here

Integrative Database

Interdepartmental Benefits

Create Custom PDF Reports/Work Orders

Data Review and Analysis

Progress – Year 4• 3 Watersheds Completed

• 225 Miles of Stream Surveyed

• 1,161+ Outfalls Mapped and Assessed

• 734 Water Quality Concerns Identified

• 150+ Sanitary Sewer Aerial Crossings Inspected

• Vast Increase in Local Knowledge Base!

By The Numbers

79%

19%

1%

1%

Unlikely

Potential

Suspect

Obvious

By The Numbers

83%

17%

No

Yes

92%

8%

Highlights Importance ofPreventative Maintenance!!

By The Numbers

Yes

No

Internal QA/QC

Summary and Conclusions

• INTIMATE PHYSICAL KNOWLEDGE OF YOUR WATERSHEDS IS INVALUABLE

• ORI Can be Effective and Inexpensive Tool

• Planning and Prioritization are Critical

• Quality of Data Management will Determine How Much Benefit You Receive From Your Inventory

• Share Information with other Departments and Regulatory Agencies!!

Questions???

Daniel BallardCity of Auburn, Alabama

Water Resource Management Departmentdballard@auburnalabama.org

(334) 501-7367