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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
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Presentation OutlineI. Introduction & Background II. What is an Outfall
Reconnaissance Inventory?III. Planning, Prioritizing, and
Managing Field InvestigationsIV. Tracking and DocumentationV. Data Review and AnalysisVI.Summary and Conclusions
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Introduction and Background
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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
LegendLee County
Auburn University Phase II
Tallapoosa River Basin
City of Auburn Phase IIAnnexed
ACT99_577
Annexed
ChattahoocheeTallapoosa
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What is an Outfall Reconnaissance Inventory?
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• 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?
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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
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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
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Planning, Prioritizing, and Managing Field Investigations
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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
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Know Your Limits.Jurisdictional Limits That Is!
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SIMPLE ADVANCED
Gather Available Data
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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
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A Method of Prioritization
9
10
7
6
53
4
2 1
8
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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
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Schedule Overlay
Start Here!
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Getting Started – It Takes Two
SAFETY IN NUMBERS
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Necessary EquipmentField Vest
Spray PaintField Book
Tape MeasurerCameraMachete
MapORI Field Sheets
BootsSunscreenOptional
GPSPocket Colorimeter
Snake ChapsPVC Caps
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Use the IDDE Guidance Manual
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How to Manage Your Data
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Information Tracking
**A Product of an Interdepartmental Collaboration Between City of Auburn Information Technology and
Water Resource Management Departments
Click Here
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Integrative Database
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Interdepartmental Benefits
Create Custom PDF Reports/Work Orders
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Data Review and Analysis
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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!
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By The Numbers
79%
19%
1%
1%
Unlikely
Potential
Suspect
Obvious
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By The Numbers
83%
17%
No
Yes
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92%
8%
Highlights Importance ofPreventative Maintenance!!
By The Numbers
Yes
No
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Internal QA/QC
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Summary and Conclusions
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• 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!!
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Questions???
Daniel BallardCity of Auburn, Alabama
Water Resource Management [email protected]
(334) 501-7367