Dugway West Interceptor Relief Sewer (DWIRS) April 4, 2013

Agenda

• Project Location and Alignment• Easements, Constraints, and

Construction Sequencing• Community Benefits and

Restoration• Project Clean Lake and CSO

Benefits once completed

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About us

• Created by Court Order in 1972• Servicing all or part of 62

member communities• 1 million customers• 90+ billion gallons wastewater

treated each year

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What We Do

• Three wastewater treatment plants• Interceptor sewer operation,

maintenance• Combined Sewer Overflow control• Regional Stormwater Management

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Combined Sewer System

WWTP

Regulator

Industrial Wastewater

Street CatchBasins

Domestic Wastewat

er

Flow to WWTP

Combined Sewer

Lake Erie

Combined Sewer

Overflow

Dry weather outlet (DWO)

Storm Water Outlet (SWO)

How they work:Regulating structures allow excess stormwater to overflow

Side-spill weirSide-spill weir

Overflow pipeOverflow pipe

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Combined Sewer Overflow (CSO)

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Netting facility, floatable debris from combined sewer overflow 2010

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Project background

• Control CSO overflows• Consolidate existing regulators• Provide relief for up to a 5-year, 6-

hour storm event• Convey flow to current interceptor,

future tunnel• Prepare for future 17’ Doan Valley

Tunnel

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By the numbers

•11,000 feet3’ to 6’ sewers in tunnel

•2,700 feet15” to 7’ sewers in open-cut

• Plus structures, regulators, and modifications

DWIRS location related to Dugway West Brook and Dugway West Culvert

Existing local sewer system

Existing CSO Regulators

Proximity to Dugway East Brook and Dugway Storage Tunnel

Proximity to Easterly Interceptor on the North End

Proximity to Doan Valley Tunnel on the South End

DWIRS Location

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Open Streams, Brooks ORIGINAL

Doan Brook/ CulvertDoan Brook/ Culvert

Dugway West Brook /Culvert

Dugway West Brook /Culvert

Nine Mile Creek/Culvert

Nine Mile Creek/Culvert

Dugway East Brook/Culvert

Dugway East Brook/Culvert

Open Streams, Buried Culverts CURRENT

Doan Brook/ CulvertDoan Brook/ Culvert

Dugway West Brook /Culvert

Dugway West Brook /Culvert

Nine Mile Creek/Culvert

Nine Mile Creek/Culvert

Dugway East Brook/Culvert

Dugway East Brook/Culvert

Bidding, Construction Schedule

1. DWIRS Project Bidding May 2013

2. Construction Start Sept. 2013

3. Substantial Completion May 2016 (32 months)

4. Final Completion Sept. 2016(36 Months)16

Easements, property acquisition• Ongoing discussions• Negotiations: TranSystems• Land Bank acquisitions, demolition:

NEORSD• 8 properties to be demolished• Demolition work will occur in the

first 5 months

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Project Constraints

• Focus: Northern half, then southern– Utility relocation by other agencies

may occur anywhere along alignment

• Limit active shafts, work sites• Restore work zones shortly after

completion

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Project Constraints

• Coordinate with schools to maintain access to all driveways

• Limit haul routes• Complete work within St. Clair

within 12 months

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Project Constraints

• Complete Durant sewer in final 12 months

• Demolish eight structures within first five months

• Work hours: 7 a.m. – 7 p.m.Monday – Saturday per the City

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Mainline A-Open Cut Mainline B-Tunnel St. Clair Ave East

Mainline C-Tunnel

Estimated Work Durations

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25

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Provisions and monitoring• Inspections: Contractors will

video and photograph structures’ exterior

• Markers: Contractor will install Geotechnical instrumentation and survey markers on structures

• Vibration monitoring

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Provisions and monitoring• Surface settlement monitoring

over tunnel• Post-construction inspection• Restoration as needed

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Community benefits, restoration

• Aspects of restoration are open to community input

• Final Roadway restoration will include new pavement

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Community benefits, restoration

• Additional demolition will be considered

• Additional community benefits will be considered as opportunities are presented

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What is Project Clean Lake?• Consent decree with EPA• $3 billion 25-year program to

address water quality issues caused by sewage overflows (CSOs)

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What is Project Clean Lake?• 772 communities have similar

mandates

What is Project Clean Lake?• Reduce combined sewer overflow

volume

0123456789

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1972 TODAY 2035

Billions

of gallons

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7 tunnels to control CSO• 21 total miles• 17’ to 24’ diameters• 100’ to 200’ underground• Three Deep Tunnel Pump Stations• Drop Structures, Near Surface

Sewers and Structures

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Other CSO Project Coordination DST Overlap (DST)

DST-4 Forest Hills Park DST-5 St. Clair/E 109th DST-7 Lakeview and Ada DST-8 Lakeview and

Superior East 140th Relief Sewer

(E140) Doan Valley Tunnel (DVT)

Lakeview and Ada Superior Ave

Shoreline Storage Tunnel

(SST) Forest Hills Park Mining

Site

SSTSST

E140E140

DWIRSDWIRS

DSTDST

DVTDVT 47

AERIAL ALIGNMENT

DEIRS PROPOSED ALIGNMENT

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CSO Reduction Benefits

Project TitleYear of

Completion

AnnualCSO capture

Dugway East Relief Sewer (DEIRS) 2012 85 Million Gallons

Euclid Creek Storage Tunnel (ECT) 2015 344 Million Gallons

Dugway West Relief Sewer (DWIRS) 2016 110 Million Gallons

Dugway Storage Tunnel/E 140th (DST/E140)

2020 411 Million Gallons

Doan Valley Tunnel (DVT) 2021 348 Million Gallons

Shoreline Storage Tunnel (SST) 2027 502 Million Gallons

Total CSO Capture

1,800 Million Gallons

What’s the benefit?

• Improve water quality– Clean beaches, recreation– Protecting clean-water resource– Improve our regional image– Neighborhood revitalization

• Regional economic impact– Job creation– Tax Revenue

3900 Euclid Avenue | Cleveland, OH 44115 | (216) 881-6600 | neorsd.org

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