The document summarizes the Louisville MSD infrastructure including its combined sewer system history and efforts to reduce combined sewer overflows through green infrastructure initiatives. It notes that the combined sewer system covers 24,000 acres and 670 miles of pipe, discharging over 2.6 billion gallons of overflow annually. Louisville MSD has invested over $400 million in a program to achieve 95% wet weather capture and comply with regulatory requirements through projects like dam installations, storage basins, and an amended consent decree requiring further improvements. The presentation highlights Louisville MSD's focus on green infrastructure strategies like rain gardens, bioswales, downspout disconnections, and green alleys to further reduce overflows in a cost-effective manner

1. Louisville MSD
Louisville and Jefferson County
Metropolitan Sewer District
Presented in Milwaukee on October 4, 2011

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5. Combined Sewer System History
Major CSS
Major CSS
Historic Streams
Copyright ©2010:LOUISVILLE & JEFFERSON COUNTY METROPOLITAN
Historic Streams
SEWER DISTRICT (MSD)LOUISVILLE WATER COMPANY (LWC) LOUISVILLE
METRO GOVERNMENT AND JEFFERSON COUNTY PROPERTY VALUATION
ADMINISTRATOR (PVA). ALL RIGHTS RESERVED. 5

6. Broadway Sewer
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7. Southwestern Outfall
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8. Western FPS
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9. Beargrass Creek FPS
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10. Floodwall
10

15. Effective Greening for CSO Reduction
and much more
Louisville and Jefferson County
Metropolitan Sewer District
Presented in Milwaukee on October 4, 2011

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17. Louisville MSD Infrastructure
 20 WWTP
– 6 regional facilities
– 14 small plants
 300+ pump stations
 3,200 mi of sewer
– 2,430 mi sanitary
– 670 mi combined
– 100 mi force main
 790 mi of streams
 Ohio River Flood
Protection System
– 15 Flood pump
stations
– 29 mi of floodwall

18. Louisville, Kentucky
 City of Parks – adding 4,000 acres of new parks
 Louisville Loop – 100 mile loop around the community
 Waterfront Park along the Ohio River
www.louisvilleky.gov

19. Combined Sewer System History
Major CSS
Major CSS
Historic Streams
Copyright ©2010:LOUISVILLE & JEFFERSON COUNTY METROPOLITAN
Historic Streams
SEWER DISTRICT (MSD)LOUISVILLE WATER COMPANY (LWC) LOUISVILLE
METRO GOVERNMENT AND JEFFERSON COUNTY PROPERTY VALUATION
ADMINISTRATOR (PVA). ALL RIGHTS RESERVED. 19

20. CSO AAOV and
Real Time Control
CSO AAOV
• Baseline 3,401 MG
• RTC Phase I Reduction
616 MG (18%)
• RTC Phase II Reduction
176 MG (5%)
• 2010 AAOV 2,600 MG
• Ultimate RTC Reduction
1,631 (48%)

21. Combined Sewer System
 24,000 acres
 670 miles of pipe
 106 CSOs
 2.6 B gallons AAOV
 Nearly half of area is
impervious surface
 Largest pipe 18.5’ x 27’
egg shaped

22. Dam Installation
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23. 96% Capture
$400 Million Program Cost

24. IOAP Program Benefits
Regulatory Performance
Combined Sewer Plan
– 95% wet weather capture supported
by “knee of the curve” evaluation
– Remaining CSOs alone (no background
sources) do not cause significant WQ
standards violations, complying with
EPA “demonstrative approach”
Sanitary Sewer Plan
Eliminates
– 167 documented SSOs
– 8 small WWTPs
– 100 tons BOD5, nearly 200 tons solids
– Correction of Jeffersontown WWTP

25. Local Green Drivers
 Improved Water Quality
 Improved Air Quality
 Public Desire
 Improved Quality of Life
 Economy

28. Green Infrastructure
Right Sizing Strategy
Storm Water Injection Wells
Downspout Disconnection
High Cost
Effectiveness
Infiltration Trenches
Bioswale
Rain Gardens
Lower Cost
Pervious Effectiveness
Pavers
Green
Roofs
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29. Business Case
 Translates to 250 million gallon AAOV
reduction
 Estimated gray cost per gallon
$0.30/gallon
 Partnerships provide cost sharing
opportunities
CLEAN, GREEN, GROWING COMMUNITY

30. Beargrass Creek
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31. August 4, 2009
 Over 7 inches of rain in 75 minutes on
most intensely developed portion of the
city!
 Significant damage to residential,
commercial, and government buildings
 Combined Sewer System completely
inundated

33. Third & Magnolia

34. Historic Flooding
Aug 2009 - Near
22nd & Broadway
1992 -
Humler Street
Boat Rescue
Aug 2009 - Near
Maple Street
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37. University of Louisville
 Master Plan Created to Capture 25-Year
Storm Event on the Belknap Campus
 Upstream of Park Hill and Maple Street
Areas
 Using Green Incentives to Route ALL
Impervious Surfaces on Campus to
Infiltrating Features to Capture 5.1 Inches
of Rain.

38. CSO 206 Downspout Disconnection
Pilot Program
CSO 206 Area

39. Multi-Acre Green Infrastructure Projects for Stormwater Reduction

40. Green Infrastructure
 Monitoring in place
 Staff empowered
 100 Projects to start this year
 Revised Credits Program

43. Senior Discount Program
Age 65
$35,000 or less

44. Click on Logo
CLEAN, GREEN, GROWING COMMUNITY

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46. Contact Information
Brian Bingham
502-540-6145
bingham@msdlouky.org

47. Sewershed Analysis

48. Green Infrastructure
 Green Roads
 Green Alleys
 Green Parking Lots
 Bioinfiltration
 Urban Reforestation
 Rain Gardens
 Rain Barrels
 Downspout Disconnection
 Green Roofs

49. Local Green Drivers
 Improved Water Quality
 Improved Air Quality
 Public Desire
 Improved Quality of Life
 Economy

50. Title
 v

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52. Amended Consent Decree
 Original CWA 308 Letter – May 2003
 Original Consent Decree – August 12, 2005
 Amended Consent Decree – April 15, 2009
 Integrated Overflow Abatement Plan
approved and incorporated into ACD –
February 2010

53. Amended Consent Decree
 Significant Additions or Expansions
– Definitions
– Jeffersontown Water Quality Treatment Center
 Eliminate Blending
 Potential New Connections
– Sampling, Monitoring, and Reporting
– Stipulated Penalties

54. Southwestern Outfall
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56. Maple Street – Properties: 127;
Aggregate Benefit/Cost Ratio > 2.0

57. MFWQTC
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58. Broadway Sewer
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59. Source Control Investments
Front-Loaded to Maximize Gray Reductions
 Green Infrastructure initial $46 M, $40 M in first 6 years
 Annual program includes demonstration projects, subsidies, and
incentives
 Program includes line items for:
– Downspout disconnects, rain gardens, rain barrels
– Green roofs
– Green streets & dry wells
– Pervious pavement
– Urban reforestation
 Adaptive management allows greater investment based on
demonstrated performance

60. MSD Main Office Rain Garden
August 2009 – 8.1” in 80-minutes: Day after installed; Day before plantings ins