Nbc cso apwa expo july 8 t12
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Transcript of Nbc cso apwa expo july 8 t12
Narragansett Bay CommissionNarragansett Bay CommissionCombined Sewer OverflowCombined Sewer OverflowControl Facilities ProgramControl Facilities Program
The Biggest Project You will Never The Biggest Project You will Never SeeSee
Narragansett Bay CommissionNarragansett Bay CommissionCombined Sewer OverflowCombined Sewer OverflowControl Facilities ProgramControl Facilities Program
The Biggest Project You will Never The Biggest Project You will Never SeeSee
Paul Pinault, P.E. Former Executive Director NBCPaul Pinault, P.E. Former Executive Director NBC
Client Service Leader CDM SmithClient Service Leader CDM Smith
Paul Pinault, P.E. Former Executive Director NBCPaul Pinault, P.E. Former Executive Director NBC
Client Service Leader CDM SmithClient Service Leader CDM Smith
NBC CSO NBC CSO ProgramProgram
NBC CSO NBC CSO ProgramProgram
Combined Sewer OverflowCombined Sewer OverflowControl Facilities ProgramControl Facilities ProgramCombined Sewer OverflowCombined Sewer OverflowControl Facilities ProgramControl Facilities Program
Phase I Facilities...Phase I Facilities...Phase I Facilities...Phase I Facilities...
CSO Diversion and CSO Diversion and CollectionCollection
CSO Storage - Main CSO Storage - Main Spine TunnelSpine Tunnel
Tunnel Capacity: Tunnel Capacity: – 61.8 MG Design61.8 MG Design– 66.5 MG Actual66.5 MG Actual
Tunnel Pump Tunnel Pump StationStation
CSO Diversion and CSO Diversion and CollectionCollection
CSO Storage - Main CSO Storage - Main Spine TunnelSpine Tunnel
Tunnel Capacity: Tunnel Capacity: – 61.8 MG Design61.8 MG Design– 66.5 MG Actual66.5 MG Actual
Tunnel Pump Tunnel Pump StationStation
SITE S1 AND OUTFALL 067
CSO Diversion and CollectionCSO Diversion and CollectionCSO Diversion and CollectionCSO Diversion and Collection
COMBINED SEWAGEOVERFLOW - DIVERSION AND STORAGE
TUNNEL1.PRS
DIVERSION STRUCTURE(APPROX. 22'L X 12'W)
INTERCEPTS EXISTING CSO OVERFLOW
GATE & SCREENING STRUCTURE(APPROX 35'L x 20'W)CONTROLS FLOW INTO TUNNEL
APPROACH CHANNELORGANIZES FLOW TO CREATE VORTEX
DE-AERATION CHAMBERREMOVES ENTRAINED AIR FROM FLOWS
RECIRCULATION PIPEDE-AERATED AIR IS DRAWN BACK INTO DROP SHAFT
CONNECTING ADIT(APPROX 72" DIA; LENGTH VARIES)
EXISTING SEWER SYSTEMCURRENTLY OVERFLOWS
INTO RIVERS AND BAY DURING WET WEATHER NEAR SURFACE
FACILITIES WITHIN 25' OF GROUND SURFACE
SOIL / ROCK INTERFACE- DEPTH VARIES BETWEEN 40' AND 160'
MAIN SPINE TUNNEL(APPROX 26'DIA; 16,000' LONG & 62 MG STORAGE)CONVEYS FLOW TO PUMPING FACILITIES
DROP SHAFT(5' - 9' DIA; DEPTH 250')TRANSFERS FLOW FROM SURFACE TO TUNNEL DEPTH
VENTILATION SHAFT (2'-3.5' DIA.)
ENABLES DE-AERATED AIR TO LEAVE CHAMBER
SUCTION LINE - TRANSFERSWATER FROM TUNNEL TO
PUMPS
SCREENS
GRITS AND SCREENING REMOVAL BY GANTRY
CRANE
FORCE MAIN TO FIELDS POINT
SITE S1
CONFIGURATION OFPUMP STATION OPERATING
FACILITIES
200' ±
TPS1.PRS
UPPER LEVEL - PUMP FLOOR
LOWER LEVELPUMP FLOOR
TPS OPERATION & CONTROL BUILDING
110'±
68'±
SoilDepth155'±
Rock150'±
TOTAL DEPTH TO INVERT 305'±
SUMP
SAFEROOM
32-FEET DIAMETERACCESS SHAFT
MAIN SPINE TUNNEL62 MG
11-FEET DIAMETEREQUIPMENT
HOISTING SHAFT
SAFEROOM
SITE S1CONFIGURATION OF PUMP STATION OPERATING FACILITIES
CSO StorageCSO StorageMain Spine TunnelMain Spine Tunnel
CSO StorageCSO StorageMain Spine TunnelMain Spine Tunnel
Tunnel capacity: Tunnel capacity: – 61.88 MG (Design)61.88 MG (Design)– 66.5 MG (Actual)66.5 MG (Actual)
Tunnel capacity: Tunnel capacity: – 61.88 MG (Design)61.88 MG (Design)– 66.5 MG (Actual)66.5 MG (Actual)
Seven dropshaftsSeven dropshafts
divert flow to the tunneldivert flow to the tunnel
Seven dropshaftsSeven dropshafts
divert flow to the tunneldivert flow to the tunnel
B R I N E P U M P
M O B I L E R E F R I G E R A T I O N P L A N T
E X P A N S I O N V A L V E
L I Q U I D R E F R I G E R A N T
F R E E Z E T U B E S
C O O L I N G W A T E R
L O W P R E S S U R E R E F R I G E R A N T G A S
H I G H P R E S S U R E R E F R I G E R A N T G A S
C O M P R E S S O RC H I L L E RC O N D E N S E R
D E V E L O P I N GF R E E Z E W A L L
B R I N E F R E E Z I N G S Y S T E M
Developmental Phases
1
2
3
45
6
9
78
1011
2
3
4,5
6,7,8
9,10,11
The End of the TunnelThe End of the Tunnel