city of akron combined sewer overflow (cso) long term … · 2013-05-15 · –cuyahoga river...
TRANSCRIPT
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City of Akron
Combined Sewer Overflow (CSO)
Long Term Control Plan
Separate Our Sewers
Save Our Streams
Ohio OWEA
Collection Systems Workshop
Patrick Gsellman
Genny Hanna
Jim Hall
Thursday, May 9, 2013
SOS
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AGENDA
City of Akron CSO LTCP Update
• Patrick Gsellman, PE, WW3
• Environmental Division Manager
Sewer Separation Projects: Design
• Genny Hanna, PE
• Project Manager, Senior Engineer
Sewer Separation Projects: Construction
• Jim Hall, PE
• Project Manager, Civil III
Questions
CSO Program Management Team Page 2
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City of Akron CSO LTCP Update
Benefits
– Cuyahoga River
– Water Quality
Federal Consent Decree Elements
CSO Long Term Control Plan
CSO Program Management Team Page 3
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Cuyahoga River
Watershed Water Quality
CSO Program Management Team Page 4
POTW IMPROVEMENTS
WPCS Improvements
Elimination of Sanitary Sewer
Overflows
Implementation of Industrial
Pretreatment
Implementation of Combined
Sewer Overflow Nine Minimum
Controls
Rack Modifications
Maintenance/Inspection
Cuyahoga Street Storage Facility
(CSSF - CSO Rack 40)
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CSO Program Management Team Page 5
Reduction in Events, Hours and Volume of CSO
NO UNTREATED OVERFLOWS IN TYPICAL YEAR
Elimination of Overflows to the Ohio Canal
Biological Treatment of ALL WPCS Secondary
Bypass
Reduction in Mud Run Pump Station Overflows
Improved Operation and Maintenance of the Sewer
System
Supplemental Environmental Project (St Rt 82 Dam)
Benefits - Specific/Measurable
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CSO Program Management Team Page 6
Improved Water Quality (Chemical)
– Bacteria Reductions
– Solids Reductions
– Nutrient Reductions
– Reduction in Dissolved Oxygen Depletion
Improved Water Quality (Biological)
– Improved Fish Habitats
Improved Water Quality (Recreational)
– Bacteria Reductions
Benefits - Water Quality
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CSO Program Management Team Page 7
Compliance with CSO Policy provisions in the
Clean Water Act and furthering the goals of the
Cuyahoga River TMDL and RAP
Increased Recreation Opportunities in Akron
and Cuyahoga Valley National Park (Southern
Gateway)
Coordinated Activities with Ohio Canal and
Towpath and Possible Water Trail
Economic Development Potential Related to
Tourism and Natural Resource
Quality of Life Issues
Engineering and Construction Jobs
Money into the Local Economy
Benefits
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Consent Decree Elements
SPECIFIC
ACTION
PROJECTS
CSO AND WPCS
CONTROL
MEASURES
CMOM, FOG
AND
EMERGENCY
RESPONSE
MUD RUN
PUMPING
STATION
Upgrade
WPCS to
130mgd
Separation
Projects (8,
25,21, 30 &
13)
Long Term Control
Plan Update and
Report
Program
Development
and
Implementation
Pump
Station
and
Collection
System
Study
CD: Complete all projects by October 15th, 2028
LTCP Update : October 31, 2027
CSO Program Management Team Page 8
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Sewer Separation Projects Design
Rack 8 – Construction Complete
Rack 25 – Construction Complete
Rack 21 – Design Underway
Rack 30 - Design Underway
Rack 13 - Design Underway
CSO Program Management Team Page 9
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Sewer Separation Drainage Areas
CSO Program Management Team Page 10
N
30
25
21 13
8
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CSO Rack Structures
CSO Program Management Team Page 11
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CSO Outlet Structures
CSO Program Management Team Page 12
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CSO Rack 25 Sewer Separation Design
CSO Rack 25
• Located North of Downtown Akron
• Rack Located in a Manhole in Bass Avenue
• Overflowed to Little Cuyahoga River
CSO Program Management Team Page 13
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CSO Rack 25 Sewer Separation Design
Pre-Design Work
• Researched Record Information
• Televised Existing Sewers
• Performed Smoke Testing
• Completed Flow Calculations
CSO Program Management Team Page 14
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CSO Rack 25 Sewer Separation Design
Proposed Improvements
• New 8 inch sanitary sewer ( 3,500 feet)
• Existing combined sewer became the storm sewer
• Reconstruct 8 inch water main ( 1,300 feet)
CSO Program Management Team Page 15
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CSO Rack 25 Sewer Separation Design
Design Challenges
• Steep Slopes
• Existing Utility Locations
• Land Acquisition
CSO Program Management Team Page 16
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CSO Rack 8 Sewer Separation Design
CSO Rack 8
• Located Southeast of Downtown Akron
• Rack Located near Case Avenue and Kent Street
• Overflowed to Little Cuyahoga River
CSO Program Management Team Page 17
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CSO Rack 8 Sewer Separation Design
Proposed Improvements
• New 8-15 inch Sanitary Sewer ( 5,000 feet)
• New 12-36 inch Storm Sewer ( 1,100 feet)
• Reconstruct 8-inch to 36-inch Sanitary and Storm Sewer with CIPP Lining ( 4,000 feet)
CSO Program Management Team Page 18
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CSO Rack 8 Sewer Separation Design
Design Challenges
• Availability of Underground Record Information
• Accelerated Design Schedule
• Existing Utility Locations
• Coordination with Railroad
CSO Program Management Team Page 19
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Sewer Separation Projects Construction
CSO Rack 25 Sewer Separation
Bid: 8/23/2011, Start: 12/6/2011, Finish: 11/9/2012
Time extension of 134 days (work in easement)
$ 1,159,000 Engineer’s Estimate
$ 965,000 Low Bid (-16.8%)
$ 1,060,500 Final Cost (-8.5%)
Additional work for existing sewer repairs
(project design began in 2004 – old CCTV
information) and easement restoration costs.
CSO Program Management Team Page 20
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Sewer Separation Projects Construction
CSO Rack 8 Sewer Separation
Bid: 10/20/2011, Start: 1/9/2012, Finish: 10/4/2012
No time extensions
$ 2,839,000 Engineer’s Estimate
$ 1,995,000 Low Bid (-32.9%)
$ 2,096,000 Final Cost (-26.2%)
Additional work: existing lateral investigations
and connections on Case Avenue (shallow
rock), existing underground utilities (different
locations), and surface restorations on Dublin
Street, Roger Avenue, and Fulton Street.
CSO Program Management Team Page 21
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CSO Rack 25 Sewer Separation
CSO Program Management Team Page 22
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CSO Rack 25 Sewer Separation
CSO Program Management Team Page 23
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CSO Rack 8 Sewer Separation
CSO Program Management Team Page 24
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CSO Rack 8 Sewer Separation
CSO Program Management Team Page 25
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CSO Program Management Team Page 26
Commissioning & Handover
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Page 27
CSO Program Website
(www.akroncso.com)
330-375-2355
City of Akron Website
(www.akronohio.gov)
SOS
Separate Our Sewers
Save Our Streams
City of Akron CSO LTCP Update
• Pat Gsellman
Sewer Separation Projects: Design
• Genny Hanna
Sewer Separation Projects: Construction
• Jim Hall