here (PPTX 4.6 mb)

Report
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
1
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
3
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
4
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
5
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
6
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.
11
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-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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