Omahas 1 7 Billion Combined Sewer Overflow Program
Omaha’s $1. 7 Billion Combined Sewer Overflow Program CH 2 M HILL 2013 Alumni Retreat GDPWaterOmaha_MRWWTP_WBG 031110003842 DEN Presented by Tom Heinemann, CH 2 MHILL October 2, 2013
Presentation Topics • Planning Phase • Implementation Phase • Adaptive Management • Q&A
Aspects of Omaha • A very mid-western city: – People are nice, polite, hard-working, not flashy who value trusting relationships with their consultants (think Warren Buffet) • An attractive city: – Convention Center, new baseball stadium for College World Series, Old Market, Missouri River, pedestrian bridge, easy airport, Midtown redevelopment • Key Industries and Agencies: – USACE Omaha District; Offut AFB; Con. Agra HQ; Mutual of Omaha; Woodmen of the World; Union Pacific; Berkshire Hathaway 3
Omaha Sewer System & CSOs • • • 1, 950 miles of sewers – Eastern half combined – Western half separate 43 sq mi combined sewer area (out of 275) 29 CSO outfalls – 10 to Papillion Creek – 19 to Missouri River 2 Treatment Plants 600, 000 service population
Current Annual Overflow Statistics No. of Overflows CSO Volume (MG/yr) Missouri River Watershed 78 2, 788 Papillion Creek Watershed 67 710 Total System 78 3, 498 Total Wet Weather Volume NA 8, 181
Five Major Elements of Final Long Term Control Plan Targeted Sewer Separation Projects Two High-Rate Treatment Facilities One Deep Conveyance Tunnel
Five Major Elements of Final Long Term Control Plan Two Underground Storage Tanks One Deep Conveyance Sewer
Typical Combined Sewer Combined Service Lateral Stormwate r Lateral Omaha residential street Combined Sewer Line
Typical Sewer Separation House Sanitary Lateral Stormwate r Lateral Omaha residential street Stormwater Pipeline Sanitary Sewer Line
Deep Tunnel Schematic
Tunnel Boring Machine
Drop Shaft Surface Appearance (Milwaukee)
Storage: Below-Ground Tanks Vent Shaft Access Manhole For Cleaning, etc. Access Shaft Inflow Pipe Baffle Wall To Overflow “Tipping Bucket” Flushing System To Interceptor Pumps
Green Solutions Rainwater Capture Landscaping – Bioretention Basin Conveyance (Swales)
After LTCP Annual Overflow Statistics Number of Overflows (2024) Percent of overflow volume controlled (2024) Missouri River Watershed 4 92% Papillion Creek Watershed 4 96% Total System 94%
Missouri River Below Papillion Creek 1, 60 E+19 Annual E. coli Loading 1, 40 E+19 1, 20 E+19 Papillion Creek 1, 00 E+19 CSO 102 WWTPs 8, 00 E+18 CSO - Treated CSO - Untreated 6, 00 E+18 Stormwater 4, 00 E+18 Upstream 2, 00 E+18 0, 00 E+00 Existing Load LTCP Load
Integrated Program Management Team: Makeup • • • Identified City staff CH 2 M HILL HDR Engineering (Omaha is their HQ) Lamp, Rynearson & Associates Lovgren Marketing Consulting staff approximately 20 FTEs 17
Key Areas of Interaction and Responsibility 18
Numerous Design and Construction Projects Are Ongoing • 19
Average Residential Sewer Bills $40. 00 $37. 23 $35. 00 $30. 00 $25. 00 $20. 00 $15. 00 $10. 00 $5. 00 $0. 00 2006 2007 2008 2009 2010 Monthly Household Bill 2011 2012 2013 2014
Adaptive Management Approach
Adaptive Management • • • LTCP Update due in 2014 Optimize the plan and reduce costs Update project schedule based on change in compliance date from 2024 to 2027 Flexible Administrative Consent Order allows City to make changes without involvement by courts City must continue to adapt as the Plan is implemented 22
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CSO Planning and Implementation Timeline Preliminary Combined Sewer Overflow (CSO) Long-Term Control Plan (LTCP) 2006 -2007 Final CSO LTCP 2007 -2009 Implementation of CSO Controls 2010 -2027 2008 2009 2010 Negotiate Final Water Quality Goal 2008 Design of CSO Controls 2009 -2026 2023 2027
For More Information… 26
Comments & Questions
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