City
City of
of Auburn,
Auburn, Alabama:
Alabama:
Outfall Reconnaissance
Inventory Program
Prepared for
Alabama Water Resources Conference
September 4-6, 2013
Orange Beach, Alabama
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
Tallapoosa
Chattahoochee
Lee
County
Legend
Lee County
Auburn University Phase II
Population Served – Around 60,000
Phase II Coverage – 60+/- Sq. Miles
Tallapoosa River Basin
City of Auburn Phase II
Annexed
ACT99_577
Annexed
Storm Sewer – 100+ Miles of Pipe
Receiving Waters – 450 Miles of Stream
What is an Outfall
Reconnaissance Inventory?
Outfall Reconnaissance
Inventory
• Involves
–
–
–
–
–
Field Location
Documentation
Evaluation
Mapping
Characterization
Iron Floc Anyone?
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
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 stormsewer 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!
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
0
2
3
5
1
Schedule by Density
Acreage
Percent Area
Ag/Pasture
228.51
8.95%
Ag/Tilled
28.56
1.12%
Coniferous
744.20
29.15%
Acreage
Percent Area
Ag/Pasture
12.35
1.38%
Ag/Tilled
14.41
1.62%
Coniferous
449.79
50.45%
Acreage
Percent Area
Ag/Pasture
93.81
7.86%
Ag/Tilled
14.52
1.22%
Coniferous
403.45
33.80%
Acreage
Percent Area
Ag/Pasture
276.39
7.28%
Ag/Tilled
46.02
1.21%
Coniferous
1712.07
45.08%
Acreage
Percent Area
Ag/Pasture
158.63
6.36%
Ag/Tilled
39.76
1.59%
Coniferous
945.64
37.90%
Acreage
Percent Area
Ag/Pasture
104.20
3.31%
Ag/Tilled
30.16
0.96%
Coniferous
830.15
26.34%
Acreage
Percent Area
Ag/Pasture
680.11
12.91%
Ag/Tilled
83.22
1.58%
Coniferous
2170.83
41.21%
Acreage
Percent Area
Ag/Pasture
48.54
10.64%
Ag/Tilled
3.73
0.82%
Coniferous
198.65
43.52%
Acreage
Percent Area
Ag/Pasture
2448.06
10.48%
Ag/Tilled
299.80
1.28%
Coniferous
9406.59
40.27%
Acreage
Percent Area
Ag/Pasture
290.46
5.95%
Ag/Tilled
29.90
0.61%
Coniferous
2345.14
48.04%
BASIN 1 LANDCOVER
Deciduous
Open
324.07
138.06
12.70%
5.41%
BASIN 2 LANDCOVER
Deciduous
Open
180.34
35.34
20.23%
3.96%
BASIN 3 LANDCOVER
Deciduous
Open
168.79
87.33
14.14%
7.32%
BASIN 4 LANDCOVER
Deciduous
Open
839.67
202.62
22.11%
5.33%
BASIN 5 LANDCOVER
Deciduous
Open
688.91
247.75
27.61%
9.93%
BASIN 6 LANDCOVER
Deciduous
Open
1304.47
505.67
41.39%
16.04%
BASIN 7 LANDCOVER
Deciduous
Open
1175.72
495.01
22.32%
9.40%
BASIN 8 LANDCOVER
Deciduous
Open
169.43
12.91
37.12%
2.83%
BASIN 9 LANDCOVER
Deciduous
Open
8070.19
2059.94
34.55%
8.82%
BASIN 10 LANDCOVER
Deciduous
Open
1221.96
682.39
25.03%
13.98%
Urban
1050.51
41.15%
Water
Urban
198.45
22.26%
Water
Urban
406.79
34.08%
Water
Urban
625.25
16.46%
Water
Urban
347.26
13.92%
Water
Urban
364.72
11.57%
Water
12.26
0.39%
Total
3151.63
100.00%
Urban
500.26
9.50%
Water
162.50
3.08%
Total
5267.64
100.00%
Urban
Water
38.66
1.51%
0.96
0.11%
18.81
1.58%
96.01
2.53%
67.46
2.70%
Total
2552.57
100.00%
Total
891.64
100.00%
Total
1193.50
100.00%
Total
3798.03
100.00%
Total
2495.41
100.00%
21.98
4.81%
1.19
0.26%
Total
456.43
100.00%
Urban
927.00
3.97%
Water
148.23
0.63%
Total
23359.80
100.00%
Urban
279.51
5.73%
Water
Total
4881.83
100.00%
% URBAN LC
32.47
0.67%
Basin 1 Outfalls
Headwalls
Headwalls/Acre
440.00
0.17
Basin 2 Outfalls
Headwalls
Headwalls/Acre
96.00
0.11
Basin 3 Outfalls
Headwalls
Headwalls/Acre
173.00
0.14
Basin 4 Outfalls
Headwalls
Headwalls/Acre
58.00
0.02
Basin 5 Outfalls
Headwalls
Headwalls/Acre
63.00
0.03
Basin 6 Outfalls
Headwalls
Headwalls/Acre
52.00
0.02
Basin 7 Outfalls
Headwalls
Headwalls/Acre
0.00
0.00
Basin 8 Outfalls
Headwalls
Headwalls/Acre
4.00
0.01
Basin 9 Outfalls
Headwalls
Headwalls/Acre
0.00
0.00
Basin 10 Outfalls
Headwalls
Headwalls/Acre
21.00
0.00
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
Use the IDDE Guidance
Manual
How to Manage Your Data
Information Tracking
Click
Here
**A Product of an Interdepartmental Collaboration
Between City of Auburn Information Technology and
Water Resource Management Departments
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
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!!
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 Ballard
City of Auburn, Alabama
Water Resource Management Department
dballard@auburnalabama.org
(334) 501-7367