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District of Columbia Water and Sewer Authority
George S. Hawkins, General Manager
Briefing on:
Northeast Boundary Neighborhood Protection Project
Status Update
Briefing for:
ANC 5E
September 17, 2013
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Northeast Boundary Neighborhood Protection Project
Status 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 required
9:30AM – 3:30PM
Monday – 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
Irving St
North Capitol
Tank & Diversion
Structure
(under
construction)
First St Tank &
Diversion
Structure
N. Capitol St.
Up to 6 million gallons
storage
First St.
Divert stormwater into
storage during major rain
events
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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
Portion of
Soldiers’
Home
Nat’l
Rehabilitation
Hospital
Portion of
Wash. Hospital
Center
Maps available at the time of the
Mayor’s Task Force showed the
upstream public sewers to be
Portion of
separated
Children’s Hospital
First St Tank
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66
Irving Street Green Infrastructure
Irving St
Construct Bioretention
(Green Infrastructure)
along Irving St
Michigan Ave
Bioretention will be installed in
the public right of way (traffic
medians and road sides)
Construction from November
2013 through spring 2014
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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
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
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
Bioretention
-
-
0.4
0.4
6.0
12.0
4.0
12.0
Total
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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
13
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-cisternprogram
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
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