11 district of columbia water and sewer authority george s. hawkins, general manager september 17,...
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District of Columbia Water and Sewer AuthorityGeorge S. Hawkins, General Manager
September 17, 2013
ANC 5EBriefing for:
Northeast Boundary Neighborhood Protection ProjectStatus Update
Briefing on:
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Northeast Boundary Neighborhood Protection ProjectStatus Overview
Northeast Boundary Tunnel Over $600 million Preliminary Design (on schedule; 2022 completion)
First Street Tunnel Design-Build $150-$160 million Contract award October, 2013 (on schedule) DC Water and Design-Build Contractor public meetings November Construction anticipated to begin January, 2014
McMillan Stormwater Storage $12 million Under construction
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McMillan Stormwater Storage Project North Capitol Street Diversion
Intersection of North Capitol Street NW and Michigan Avenue NW
Temporary storage tank (up to 3 million gallons) Scheduled completion (end of November 2013
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McMillan Stormwater Storage Project
Construction Schedule: North Capitol St NW Jun 2013 – Nov 2013
Construction Work Hours:Monday – Friday work in street, if required9:30AM – 3:30PMMonday – Saturday Work in Street 7:30PM – 4:30AM
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McMillan Stormwater Storage: Original Plan
Use 2 existing sand filters at McMillan site
Divert stormwater into storage during major rain events
Up to 6 million gallons storage
Irving St
Michigan Ave
Firs
t St.
N. C
apito
l St.
North Capitol Tank & Diversion
Structure (under
construction)
First St Tank & Diversion Structure
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Upstream Areas Tributary to First St. Tank Served by Combined Sewers DC Water performed due diligence
investigations upstream as part of detailed design and found: Upstream area was not completely
separated Low basements at Washington Hospital
Center would require special project to protect from flooding
Private campuses with private sewers
DC Water’s maps do not show the private sewers in these areas
Maps available at the time of the Mayor’s Task Force showed the upstream public sewers to be separated
6 6Rhode
Island Ave
Nat’l Rehabilitation Hospital
Kenyon
St
First St Tank
Portion of Wash. Hospital Center
Portion of Soldiers’ Home
Portion of Children’s Hospital
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Irving Street Green Infrastructure
Irving St
Michigan Ave
Construct Bioretention (Green Infrastructure)
along Irving St
Bioretention will be installed in the public right of way (traffic medians and road sides)
Construction from November 2013 through spring 2014
N. C
apito
l St
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Summary of Revised Plan
Moved First St diversion structure south near Channing St Connects to First Street Tunnel
McMillan storage tank (Cell 15) on First Street side will not be used Bioretention (rain gardens) on Irving Street Benefits
Facility
Original Plan (Million Gals)
Revised Plan (Million Gals)
2014 2016 2014 2016
North Cap Tank 3.0 3.0 3.1 3.1
First St Tank 3.0 3.0 - -
First St In-line Storage - - 0.5 0.5
First St Tunnel - 6.0 8
Bioretention - - 0.4 0.4
Total 6.0 12.0 4.0 12.0
Keeps combined sewage in the sewage system where it belongs
Directs stormwater to bioretention for treatment
Allows hospitals and Soldiers’ Home to remain in service uninterrupted
Bioretention improves District as a whole and serves as a model for green infrastructure
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McMillan Stormwater Storage Project
Construction Schedule: First St NW Start Dec 2013
Construction Work Hours:In coordination with DDOT and DCRA
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First Street Tunnel
Pre-Construction Surveys Residents are asked to complete the Pre-construction Survey and
Neighborhood Mitigation Questionnaire that has been mailed.
Pre-construction Surveys benefit the property owner by documenting the condition of the property before the start of construction.
By taking advantage of the survey, you will make the process easier, in the unlikely event that a construction related damage claim needs to be filed.
Without a pre-construction survey, DC Water will have no rational basis by which to confirm if your damage claim was related to the First Street Tunnel Project.
.
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First Street Tunnel
Utility Relocation Gas and electric utilities in specified locations throughout the
Bloomingdale neighborhood will be relocated in advance of tunnel construction.
Informational sheets with map will be hand delivered to residents within the affected area by DC Water.
Work will begin in late September / early October. Having local gas and electric services relocated before construction keeps project on schedule.
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Programs Available to Property Owners
DC Water Backwater Valve Rebate program Purpose: Prevent sewage from backing up through the sewer lateral
into lower level plumbing fixtures in a home Eligibility includes properties with reported sewer backups from the 2012
storms and also those hydraulically at risk from the design storm Program details:
http://www.dcwater.com/workzones/bloomingdale/Backwater.cfm
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Programs Available to Property Owners
DC Water Engineering Consultations Purpose: Identify home improvements to protect against overland
flooding Eligibility includes Bloomingdale and LeDroit Park residents with
reported flooding in 2012 storms Program details:
http://www.dcwater.com/workzones/bloomingdale/eng_consulting.cfm
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Programs Available to Property Owners
DDOE Rain Barrel/Cistern program Purpose: Detains stormwater to reduce sewer system overload Property owners in the Northeast Boundary drainage area upstream of
N. Capitol Street are eligible to receive a free rain barrel or cistern Program details:
http://ddoe.dc.gov/service/bloomingdale-sewershed-rain-barrel-cistern-program
DDOE Rain Barrel demonstration September 22, 2013 at the Bloomingdale Farmers Market (Big Bear Café)
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Northeast Boundary Neighborhood Protection Project:Contact
McMillan Stormwater Storage project information Tijuana Haynes 301-276-4007
First Street Tunnel project information Andrea Williams 202-787-4447 DCCR Email: [email protected] DCCR Website: dcwater.com/cleanrivers