1. District of Columbia Water and Sewer Authority
George S. Hawkins, General Manager
August 18, 2016
Briefing for
DEPARTMENT OF TRANSPORTATION OFFICE
OF PLANNING AND ENVIRONMENT
“DC CLEAN RIVERS” PROJECT

2. DCCR Background
Separate and Combined Sewer Systems
100% of
suburbs
67% of D.C.
1

3. DCCR Background
Long Term Control Plan Development
January 14, 2016 –
Consent Decree
Modification
Entered in Federal
Court
2
Public Participation Public Participation

4. DCCR Background
Current Plan
• DC Clean Rivers Project: $2.6 Billion
• Nitrogen Removal: $950 Million
• Total > $ 3.5 Billion
• 25 yr implementation (2005 – 2030)
• 96% reduction in CSOs & flood relief in Northeast
Boundary
• Approx 1 million lbs/yr nitrogen reduction predicted
DC CLEAN RIVERS PROJECT AND
NITROGEN REMOVAL PROGRAMS
3

5. 2142
1063
49
3254
1282
638
43
1963
54 79 5
138
0
500
1000
1500
2000
2500
3000
3500
Anacostia River Potomac River Rock Creek Total System
CSOOverflow(mg/avgyear)
1996 2013 LTCP Completed
(DC Water Formed)
4
Total System
96% CSO
Reduction
DC Clean Rivers Project Overview:
Magnitude of the Problem, Progress to Date and Benefits
Program Completion2016

6. Project Benefits: Flood Relief
Rhode Island Metro
First & P St NW
Flagler St NW
Rhode Island & T St NW
Rhode Island Between First & 2nd St
Rhode Island & T St NW
Rhode Island & First St NW
First & V St NW
5

7. More than $1.3 B in Contracts have
been let for the Anacostia River
Projects
A Blue Plains Tunnel
B Tingey Street Diversions
C CSO 019 Overflow and Diversion Structures
D JBAB Overflow and Potomac Outfall Sewer Diversion
E M Street Diversion Sewer (CSOs 015, 016 and 017)
G CSO 007 Diversion Structure and Diversion Sewer
H Anacostia River Tunnel
I Main Pumping Station and Tingey Street Diversions
J Northeast Boundary Tunnel
Y Blue Plains Dewatering Pumping Station and ECF
Z Poplar Point Pumping Station Replacement
Blue
Plains
Tunnel
Poplar Point PS
Anacostia River Tun.
Main PS Diversions
Tingey St Diversions
CSO 007
CSO 019
Northeast
Boundary
Tunnel
M St Div. Sewer
First St Tunnel
JBAB Diversions
J
Legend
Completed
Construction
Procurement
Design
6
LID at DC
Water
Facilities
Lady Bird Emerges

8. Typical Tunnel Facilities
CSO
Anacostia River
Tunnel
Pumping Station
cavern
Diversion
Structure
Drop Shaft
AditShaft
Access
Shafts
Tunnel
Overflow
Screening
Shaft
LEGEND
Below grade
Surface access req’d to construct, but
finished facility can be below grade
Above-grade facilities typically required
Plan
Pumping
Station
Screening
Shaft
Diversion
Structure Drop Shaft
Adit
Access Shafts
Shaft
Profile
Buildings typically
provided
Existing CSO
7
Located at Blue Plains

9. Blue Plains – 2015
Denite
reactors
Nitrification
Sedimentation
Dual Purpose
Sedimentation
Nitrification
Reactors
West Secondary
Sedimentation
Secondary Reactors
East Secondary
Sedimentation
East Secondary
SedimentationWarehouse & Visitors
Center
Solids
Processing
Bldg
Digesters
Central
Maintenance
Facility
Wet Weather
Treatment Facility
(under construction)
City of
Alexandria
Central Operations
Facility
Naval Research Lab
8

10. Assemble Lady Bird
Mine Tunnel
Lady Bird Emerges
Anacostia River Tunnel System
Blue Plains Tunnel
23 feet in diameter
24,207 feet long
05/2011 to 08/2015
$330M By Traylor-Skanska-JayDee 9

11. Anacostia River Tunnel System
Blue Plains Tunnel- Dewatering
10
10

12. Anacostia River Tunnel System
Blue Plains Tunnel- Dewatering Shaft
11

13. A Look Inside a TBM
Lady Bird
12

14. A Look Inside a TBM
Assembling Lady Bird
13

15. A Look Inside A DCCR TBM
Tunneling Photos
TBM Utilities in conduit
Lokie (diesel powered locomotive)
Inside Blue Plains Tunnel
Continuous conveyor belt for
excavated soils removal
Inside Lady Bird
14

16. MAIN PUMPING STATIONS DIVERSIONS
15

17. Main Pumping
Station
Diversion
Chambers
Tingey St SE
M St SE
SouthCapitolSt
DDOT
Anacostia River
Navy
Yard
Div. I Project Location
N

18. CSO 009/011A
Shaft
Internals
CSO 012
Ventilation
Equipment
Air Handling
Above
ground
structures
Above
ground
structures
Main Pumping Station Diversions 3D View

19. Proposed Above-Ground Structures
Approved by HPRB, CFA, and NCPC
Tide Gate StructureShaft Structure 8-ft black fence
(Future)
Note: Building on The Yards “Parcel L”
(multi-story building on the left of both
illustrations) is shown for illustration
purposes only.
Front view of Main
Pumping Station.
Tide Gate Structure and Shaft Structure.

20. Support of Excavation Methods
 Four Foot Diameter Secant Piles
(completed)
 18 Inch Diameter Auger Piles (completed)
 Liner Plate Shafts
 Limited Sheet Piles
Planned work activity
Driven sheet piles detail
Sheet piles – 2 -3 weeks
duration
Installation of thinner Sheets
(more vibration) – 1-2 days (
5-6 sheets left)

21. Planned Work Activities
 Construction Staging Areas: Intersection of Tingey Street SE,
New Jersey Avenue SE, and N Street SE
 Structures to be constructed:
 Tiber Creek Sewer Diversion Chamber (CSO 012)
 B Street New Jersey Trunk Sewer Diversion Chamber (CSO 011A)
 Junction sewers
 Venting control chamber
 Surge storage chamber
 Approach channel
 Main Pumping Station drop shaft
 Restore roadway to current configuration
Main Pumping Station Diversions to be
complete and operational by 2018
20

22. Current Construction Activities in Area (4th and
Tingey St – Old trapeze school)

23. Division I – Construction Activities
Distance from US DOT – 230ft
Construction Activities
 Excavation (CSO 009/011 Diversion
chamber)
 Sheet Pile driving
 Installing 11ft diameter flume pipe in
Tiber Creek Sewer Excavation
 Hauling operations - Include hauling off
site material, stone and concrete
delivery
Location of Vibration
Instrumentation
At 98 ft.
Noise Monitoring
At 95 ft.

24. The fully constructed combined sewer overflow (CSO)
control program will reduce CSOs by 96% and 98% in the
Anacostia River alone, relieve flooding throughout the
District, and is part of the strategy to reduce nitrogen
discharged into the Potomac River.
Benefits of the Fully Constructed
DC Clean Rivers Project
2323