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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: dccleanrivers@dcwater.com DCCR Website: dcwater.com/cleanrivers