CPAC Meeting 4-18-06
Transcript of CPAC Meeting 4-18-06
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Program OverviewProgram Overview
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Our Goal is to …Our Goal is to …
• Clean the sanitary sewage and return it to the river
• Send the rain water to the river
• Minimize the mixing of the two
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EPA Consent DecreeEPA Consent Decree• Agreement between City and
the U.S. EPA
• This agreement is the resolution of an 11-year-old lawsuit
• More than 400 cities nationwide are under similar orders
• Approved by voters in July 2002
• Stiff penalties for missed deadlines
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EPA Consent Decree EPA Consent Decree costscosts• Estimated at more than $450 million over a
15-year period
• Front-end loaded
• Largest capital projects occur in the first several years
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Consent Decree Consent Decree RequirementsRequirements• The Consent Decree requires the following:
• Improvements to the WWTP
• Now under construction
• Control of sanitary sewer overflows
• Nearly complete
• Final phase of Point Place work
• Completing retention basin in River Road Park• Development and implementation of a Long Term
Control Plan for Combined Sewer Overflows (LTCP)
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Consent Decree Consent Decree ImplementationImplementation
• WWTP improvements• 11 major projects• $140 million
• Sanitary Sewer Overflow Control• 13 major projects• $35 million
• Combined Sewer Overflow Control• 26 projects (planned)• Over $250 million (proposed)
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WWTP ConstructionWWTP Construction
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SSO Control ProjectsSSO Control Projects
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CSO Long Term Control CSO Long Term Control PlanPlan
• Culmination of over two years of study
• Involved the public and stakeholders along the way
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ObligationsObligations
• The consent decree requires that the LTCP evaluate a range of CSO control alternatives based on:• Pollution reduction benefits• Instream water quality conditions• Construction and operations costs
• The consent decree requires that work included in the plan be completed by August 31, 2016
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Public Input for PlanPublic Input for Plan
• Public input included:• 2 community telephone surveys• 6 public meetings• 17 Community Program Advisory Committee
meetings devoted to the Long Term Control Plan
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City’s Combined AreaCity’s Combined Area
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Existing ConditionsExisting Conditions
• Currently 32 overflows
• 17 square miles of CSO area
• Discharge 33 times per year
• Discharge 625 million gallons per year
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CSO Control Work has been CSO Control Work has been PerformedPerformed
• The City constructed three major tunnel systems to store excess flow
• The City has implemented a number of sewer separation projects to build separate sewer systems
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CSO Area to TunnelsCSO Area to Tunnels
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Sewer Separation Sewer Separation ProjectsProjects
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Alternatives ConsideredAlternatives Considered
• Flow storage and/or treatment• Storage basins and tunnels with screening and other
treatment capability
• Sewer Separation• Construction of new sewers for eliminating
combined systems
• Flow reduction/rerouting• Small-scale measures to reduce the amount of flow
to the sewer system
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Proposed PlanProposed Plan
• Reduces number of overflow locations from 32 to 23
• Reduces frequency from 33 to 4 (untreated)
• Reduces volume from 624 MG/year to 69 MG/year
• Reduces typical pollutant discharge by 86%-89%
• Reduces bacterial discharge by 90%
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Proposed PlanProposed Plan
• Includes 26 projects• Estimated cost of over $250M (2005 dollars)• Reduces Ottawa River discharge to 2 times/
year• Reduces Maumee River discharge to 4 times/
year• Reduces Swan Creek discharge frequency to 3
times/year, disinfects the discharge that does occur
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Expected Facility LocationsExpected Facility Locations
• Storage Basins• Joe E. Brown Park OR Windermere Blvd.• I – 280 / Front Street interchange area• Private property at Oakdale and Miami• City property next to I-75 on north side of Maumee
River
• Storage Pipelines• International Park• Adjacent to Jamie Farr Park
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Plan for Ottawa RiverPlan for Ottawa River
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Plan for Maumee River Plan for Maumee River (Upper)(Upper)
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Plan for Maumee River Plan for Maumee River (Lower)(Lower)
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Plan for Swan CreekPlan for Swan Creek
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Facility LocationsFacility Locations
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Sewer Separation/ Flow Sewer Separation/ Flow Reduction AreasReduction Areas
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Implementation Time FrameImplementation Time Frame
• Ottawa River: 2006 – 2015
• Maumee River: 2006 – 2016
• Swan Creek: 2007 – 2016
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Storage Basin ExamplesStorage Basin Examples
• Vast majority of work is below ground
• Will require above-ground building for support facilities
• Takes about 2 - 3 years to construct
Birmingham CSO basinBirmingham CSO basin
Leib Screening/ Disinfection Leib Screening/ Disinfection Facility - DetroitFacility - Detroit
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Storage PipelineStorage Pipeline
• Essentially large sewer underground that will provide storage volume
• Small support building required in vicinity
• Takes 1 – 2 years for construction
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Tunnel ImprovementsTunnel Improvements
• Improve tunnel hydraulics to reduce frequency
• Reduce flow area (Swan Creek South)
• Improve cleaning, other operations items
• Add disinfection capability
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Project CostsProject Costs
• All costs are based on 2005 cost index
• Actual costs at implementation will be impacted by the rate of inflation and the final project design
• Estimated overall cost: >$250 million
• Rates will be impacted by timing of projects and financing method uses
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What is Next?What is Next?
• Plan was submitted to U.S. EPA
• Waiting for EPA approval
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Next MeetingNext Meeting
• Date