1

Piney Branch Drainage

AreaPiney Branch

Tunnel

Rock Creek

049

Piney Branch Stream

Rock Creek

Current Plan Proposed Plan

049

CSO Outfall

CSO Outfall

16th

St

16

th S

t

Irving St Irving StPiney Branch Stream

Piney Branch CSO Controls

Current and Proposed Plan for Rock Creek

N

Piney Branch Drainage

Area

N

$60 M of Green Infrastructure in

Piney Branch

2

029 028

027026

025 024

022

020

Potomac Tunnel

I-66

021

Key

Br.

Lincoln Memori

al

Kennedy Center

029 028

027026

025024

022

021

020

Potomac Tunnel

I-66

Key

Br.

Lincoln Memori

al

Kennedy Center

Add 75 mgd to wet weather treatment system at Blue Plains

Current Plan Proposed Plan

Current and Proposed Plan for Potomac River

N N

$30 M of Green Infrastructure for CSO 027, 028, 029

$10 M to separate CSO 025, 026

3

Clean Rivers Projectin Planning Stage Piney Branch Early Action

Green Infrastructure Project• Install Green infrastructure practices to

mitigate CSO overflow to Rock Creek• Design-Build delivery method• Draft RFQ to be developed July 2014• Estimated contract value: $3 million• Issue RFP end of 2014• Construction period: June 2015 – 2016

4

DC Water’s Green Infrastructure Challenge Seven design award winners selected Award winners announced January

2014 RFQ/RFP for final design/construction

will be issued in Third Quarter of 2014 for construction

Construction of award winning projects will start in 2015

For more information, download the Green Infrastructure Challenge Briefing Document: www.dcwater.com/greenchallenge

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Green Infrastructure:

Potomac(Cumulative)

Rock Creek(Cumulative)

Spend $10 M by 2019 Spend $3 M by 2016

Spend $20 M by 2023 Spend $15 M by 2019

Spend $30 M by 2028 Spend $30 M by 2024

Spend $40 M by 2032 Spend $45 M by 2027

Spend $60 M by 2032

Total: $40 million Total: $60 million

Gray Infrastructure:

Place hybrid Potomac Tunnel in operation by 2030

Proposed Consent Decree Amendments and Schedule for Green Infrastructure

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Important Dates

Design ConstructionRFP NTP Completion

Design-Build

Nov 2015

2016 2022

23-foot diameter tunnel, 70 to 180 feet deep, 28,600 feet long

5 shafts and 5 diversion structures

Estimated construction value: $500 – $600 million

Delivery method: Design-Build on an accelerated schedule

NE Boundary Tunnel Alignment

7

Construction Staging Areas

Typical Diversion Facility

8

Construction Staging Areas

Mount Olivet Road (.73-acre staging area)

9

Clean Rivers Program: • Northeast Boundary Tunnel – late 2015

procurement for Design-Build and construction management

• Green Infrastructure – start work mid-2015

Upcoming Design, Design-Build, and Construction Management