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City of Auburn, Alabama: Outfall Reconnaissance Inventory Program. City of Auburn, Alabama: Outfall Reconnaissance Inventory Program. Prepared for Alabama Water Resources Conference September 4-6, 2013 Orange Beach, Alabama. Presentation Outline. Introduction & Background
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City of Auburn, Alabama: Outfall Reconnaissance Inventory Program City of Auburn, Alabama: Outfall Reconnaissance Inventory Program Prepared for Alabama Water Resources Conference September 4-6, 2013 Orange Beach, Alabama
Presentation Outline Introduction & Background What is an Outfall Reconnaissance Inventory? Planning, Prioritizing, and Managing Field Investigations Tracking and Documentation Data Review and Analysis Summary and Conclusions
Location Tallapoosa Chattahoochee Lee County Population Served – Around 60,000 Phase II Coverage – 60+/- Sq. Miles Storm Sewer – 100+ Miles of Pipe Receiving Waters – 450 Miles of Stream
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 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
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
Gather Available Data SIMPLE ADVANCED
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 7 4 8 6 1 2 10 3 5
Schedule by Density % URBAN LC HEADWALLS per ACRE
Schedule Overlay Start Here!
Getting Started – It Takes Two SAFETY IN NUMBERS
Necessary Equipment Field Vest Spray Paint Field Book Tape Measurer Camera Machete Map ORI Field Sheets Boots Sunscreen Optional GPS Pocket Colorimeter Snake Chaps PVC Caps
Information Tracking Click Here **A Product of an Interdepartmental Collaboration Between City of Auburn Information Technology and Water Resource Management Departments
Interdepartmental Benefits Create Custom PDF Reports/Work Orders
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 Unlikely 79% Potential 19% Suspect 1% Obvious 1%
By The Numbers No 83% Yes 17%
By The Numbers No 92% Yes 8% Highlights Importance of Preventative Maintenance!!
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 Ballard City of Auburn, Alabama Water Resource Management Department dballard@auburnalabama.org (334) 501-7367