Anacostia River Tunnel Briefing For: ANC 6B
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1 District of Columbia Water and Sewer Authority George S. Hawkins, General Manager Briefing On: Anacostia River Tunnel Briefing For: ANC 6B October 26, 2011 Agenda Welcome and Introductions DC Water Organization and DC Clean Rivers Project (DCCR) Overview Importance of the Anacostia River Anacostia River Tunnel (ART) Project Overview Next Steps 2 1
2 Who We Are The District of Columbia Water and Sewer Authority (DC Water) Provides Drinking water distribution for DC Required wastewater collection and treatment Stormwater collection and conveyance Treats wastewater for a population of 2.1 million District of Columbia Montgomery & Prince George s counties, MD Fairfax & Loudoun counties, VA Operates the world s largest advanced wastewater treatment plant Average daily capacity, 370 mgd Peak daily capacity, 1 billion+ gallons Serves a regional area of approx. 725 Sq Mi Blue Plains Advanced Wastewater Treatment Plant 3 What is a CSO? 100% of Suburbs 67% of DC 0% of suburbs 33% of DC 2
3 DC Clean Rivers Project Overview What is our Purpose? Control combined sewer overflows to the Potomac River Anacostia River Rock Creek Relieve flooding in the Northeast Boundary Area Implemented under a Federal Consent Decree among US Environmental Protection Agency (US EPA)/ US Department of Justice (US DOJ) District of Columbia and DC Water 5 DC Clean Rivers Project Schedule Consent Decree Requirements Principal Consent Decree Milestones for Anacostia River CSO Control Projects Consent Decree Effective March 23, 2005 Submit Facility Plan (Complete) September 23, 2008 Start Design (Complete) March 23, 2009 Start Construction (Complete)* March 23, 2012 Place in Operation River Area Tunnels (South of RFK Stadium) Northeast Boundary Area Tunnels (North of RFK Stadium) March 23, 2018 March 23, 2025 * Construction began in February 2010 with the Division W Blue Plains Site Preparation Contract 6 3
4 DC Combined Sewer System 1/3 of DC area is served by combined sewers (12,478 acres) 53 CSO outfalls 15 to Anacostia 10 to Potomac 28 to Rock Creek Three receiving waters Anacostia River Potomac River Rock Creek 7 Importance of the Anacostia River Anacostia Native American Word (Anaquash) meaning village trading center Wetland loss, deforestation, and urbanization have significantly degraded the water quality of the Anacostia River Tidal waters flow 8.4 miles Joins Potomac at Hain s Point for 108 miles Empties into the Chesapeake Bay 8 4
5 Environmental Benefits of the DC Clean Rivers Project CSO Reduction 96% Reduction in CSO Volume: Anacostia: 2,142 to 54 mil gal/yr Potomac: 1,063 to 79 mil gal/yr Rock Creek: 49 to 5 mil gal/yr Number of Overflows Reduced: Anacostia: 75 to 2/yr Potomac: 74 to 4/yr Rock Creek: 30 to 4/yr Water Quality Improvement Reduced nitrogen Bacteria levels will be lower, dissolved oxygen will be higher Trash/Floatables Reduction Trash/floatables from CSOs will be practically eliminated Flooding Relief in Northeast Boundary Area 98% Reduction in CSOs to Anacostia River 9 DC Clean Rivers Project Funding Federal Funding $153.6 million since September 30, 2011 Working to get more funding Revenue from ratepayers Impervious Surface Charge Fiscal Year 2012 anticipated $302 million Wholesale Customers Customers in Maryland & Virginia pay approx. 7.1 percent on most of the project 10 5
6 Anacostia River Projects Project Snapshot 4 large storage/conveyance tunnels Dewatering pumping station at Blue Plains Pumping station replacement at Poplar Point Schedule LTCP = 20 years ( ) Nitrogen = Cost LTCP = $2.6 billion Nitrogen = $950 M Total > $3.5 billion 11 Anacostia River Tunnel Overview 23-foot diameter TBM tunnel Soft ground 100 ± feet deep and 12,500 feet long Mining from CSO-019 south to PP-JS 6 shafts (12 to 75-foot I.D.) 3 Adits (4.5 to 10-foot I.D.) 2 Diversion Structures 6 Odor Control and Venting Facilities Monitoring & Data Collection System System Start-up Design-build contract value: $200 $250 million CSO-019 CSO-018 M Street CSO-007 CSO-005 PP-JS 12 6
7 CSO-019 NPS property CSA: 3.75 Acres Two 75-foot ID shafts; ±105 feet deep to top of invert 100-foot long Inter-Shaft Connector Tunnel Odor Control and Venting Facility: Eastside Pumping Station Internal Hydraulic Structures in South Shaft Contractor interfaces CSO-019 Diversion and Overflow Facility 13 CSO-018 DDOT property CSA: 1.25 Acres 32-foot ID shaft; ±95 feet deep to top of invert 300-foot long, 10-foot ID adit Diversion Structure Odor Control and Venting Facility Internal Hydraulic Structures within Shaft Crossings: CSX Tracks and DDOT Retained Ramp 14 7
8 M Street DMPED property CSA: 1 Acre 62.5-foot ID shaft; ±110 feet deep to top of invert Odor Control and Venting Facility Internal Hydraulic Structures within Shaft Contractor interfaces M Street Diversions DMPED Development 15 CSO-007 DDOT property CSA: 2 Acres 12-foot ID shaft; ±100 feet deep to top of invert 30-foot long, 4.5-foot ID adit Diversion Structure Odor Control and Venting Facility Internal Hydraulic Structures within Shaft Contractor interfaces 11 th Street Bridge 16 8
9 CSO-005 NPS property CSA: 0.75 Acres 12-foot ID shaft; ± 105 feet deep to top of invert 20-foot long, 4.5-foot ID adit Diversion Structure Odor Control and Venting Facility Internal Hydraulic Structures within Shaft 17 Poplar Point DDOT property CSA: 0.80 Acres Internal Hydraulic Structures within Shaft Contractor interfaces Blue Plains Tunnel Poplar Point Pumping Station Replacement DDOT South Capitol Street Project. 18 9
10 ART Estimated Schedule Event Date Issue RFQ November 2011 Receive SOQ s January 2012 Shortlist January 2012 April 2012 Issue RFP April 2012 Collaboration period April 2012 Dec 2012 Receive proposals Dec 2012 Notice to proceed June 2013 Occupy site November 2013 Substantial Completion June 2017 Final Completion September Contact Us For more information about today s presentation, Emanuel Briggs; emanuel.briggs@dcwater.com For periodic program updates, visit us online at: District of Columbia Water and Sewer Authority 5000 Overlook Ave, SW Washington, DC
11 Questions? 011 March
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