District of Columbia Water and Sewer Authority George S. Hawkins, General Manager

Briefing on: Northeast Boundary Neighborhood Protection Project Status Update Briefing for: Bloomingdale Civic Association

September 16, 2013

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) Construction anticipated to begin January, 2014 McMillan Stormwater Storage   $12 million Under construction

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)

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

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

First St Tank & Diversion Structure Irving St North Capitol Tank & Diversion Structure (under construction)



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 Portion of Soldiers’ Home

   Private campuses with private sewers DC Water’s maps do not show the private sewers in these areas

Nat’l Rehabilitation Hospital

Maps available at the time of the Mayor’s Task Force showed the upstream public sewers to be separated

Portion of Wash. Hospital Center Portion of Children’s Hospital First St Tank

6

6

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

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

McMillan Stormwater Storage Project

Construction Schedule: First St NW

Start Dec 2013

Construction Work Hours:

In coordination with DDOT and DCRA

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 event that a claim needs to be filed .

First Street Tunnel



Utility Relocation

 Gas and electric utilities in specified locations throughout the Bloomingdale neighborhood will be relocated.

 Informational sheets with map will be hand delivered to residents within the affected area  Work will begin in late September and extend for a period of approximately 10 weeks, weather permitting.

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

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

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)

Northeast Boundary Neighborhood Protection Project: Contact

 McMillan Stormwater Storage project information  Tij Haynes 301-276-4007  First Street Tunnel project information  Andrea Williams 202-787-4447   DCCR Email: [email protected]

DCCR Website: dcwater.com/cleanrivers