eligibility and general project information a4: project description support€¦ · ·...
TRANSCRIPT
August 2017
Eligibility and General Project Information
A4: Project Description Support
Pacheco Reservoir Expansion Project
Pacheco Reservoir Expansion Project
Benefit Calculation, Monetization, and Resiliency A4 Project Description Support August 2017 – i
Contents
Page
Exhibits
Exhibit 1. Project Geographic Overview ....................................................................... 1-1
Exhibit 2. Project Site Features .................................................................................... 1-2
Exhibit 3. Reservoir Plan View ..................................................................................... 1-3
Exhibit 4. Dam Embankment ....................................................................................... 1-4
Exhibit 5. Spillway Profile ............................................................................................. 1-5
Exhibit 6. Outlet Tunnel Profile ..................................................................................... 1-6
Exhibit 7. Pump/Gravity Flow Diagram ......................................................................... 1-7
Exhibit 8. Pump/Gravity Hydraulic Profile ..................................................................... 1-8
Exhibit 9. Pump Station Layout .................................................................................... 1-9
Exhibit 10. Regulating Tank ....................................................................................... 1-10
Exhibit 11. Borrow Areas ............................................................................................ 1-11
Exhibit 12. Construction Access and Staging Areas .................................................. 1-12
Pacheco Reservoir Expansion Project
Benefit Calculation, Monetization, and Resiliency ii – August 2017 A4 Project Description Support
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1"=500'
SCALE:
N
Exhibit 2
PROJECT SITE FEATURES PACHECO RESERVOIR EXPANSION PROJECT
AUGUST 2017
0 500
MAX. WATER SURFACE ELEVATION OF 694 FT
LAND ACQUISITION BOUNDARY
PERMANENT PIPELINE EASEMENT BOUNDARY
EXISTING PACHECO CONDUIT
PACHECO AND NORTH FORK PACHECO CREEK
PACHECO AND NORTH FORK PACHECO CREEK
2,000
1,000
900
700
600
500
0
800
400
300
3' RIP RIP
1' BEDDING
SEE DETAIL
GROUT CURTAINS
MAX. WATER SURFACE EL. 694
DAM CREST EL. 719
1
9
2.5
1
3
1
CORE
EARTH FILL
COARSE SAND/GRAVEL
FINE SAND FILTERS
3' BLANKET FILTERS
DETAIL1
9
NTS
CORE
.25
1
1
.5
DOWNSTREAM CHIMNEY DRAIN
CROSS SECTION OF ZONED DAM EMBANKMENT
SCALE:
1"=150'
HORIZONTAL DISTANCE (FEET)
EL
EV
AT
IO
N (F
EE
T)
DEAD POOL
EL. 450
EXISTING GRADE AT EL. 400
6' GRAVEL DRAIN
INSTALL DRAINAGE
CONVEYANCE
SYSTEM AT TOE
DOWNSTREAM CHIMNEY FILTERS
UPSTREAM CHIMNEY FILTER
2.5
1
EARTH
FILL
EARTH
FILL
TEMPORARY
COFFER DAM
COFFER DAM CREST EL. 500
CROSS SECTION OF DAM EMBANKMENT PACHECO RESERVOIR EXPANSION PROJECT
AUGUST 2017
Exhibit 4
150750
EXISTING GRADE AT SPILLWAY CENTERLINE
PROPOSED DAM
2%
100'
TRANSITION TO
TRANSITION
RECTANGULAR CHANNEL
1
1
1
2
2,000
1,000
900
700
600
500
0
800
500
400
HORIZONTAL DISTANCE (FEET)
EL
EV
AT
IO
N (F
EE
T)
STILLING BASIN
SIDE CHANNEL
SPILLWAY WEIR
PROPOSED SPILLWAY
FLIP BUCKET
SIDE CHANNEL
SPILLWAY WEIR
EL. 694'
SPILLWAY PROFILE
PACHECO RESERVOIR EXPANSION PROJECT
AUGUST 2017
Exhibit 5
SCALE:
1"=150'
0 75 150
2,0001,000
900
700
600
500
0
800
400
300
EL. 694
2.51
31
PROFILE - OUTLET TUNNEL
EXISTINGGRADE
1%
VALVE CHAMBERVAULT
DOWNSTREAMDAM SLOPE
CONNECTION TOSLOPING INTAKESTRUCTURE
LOW-LEVEL INLET
CONCRETE LINED WALK-IN TUNNELWITH STEEL CARRIER PIPE
CONCRETE LINEDUPSTREAM TUNNEL
TUNNELPORTALDEAD POOL
EL. 450
DAM CREST EL. 719
HORIZONTAL DISTANCE (FEET)
ELE
VA
TIO
N (F
EE
T)
PIPELINE TO GATEHOUSE/PUMP STATION
OUTLET TUNNEL PROFILEPACHECO RESERVOIR EXPANSION PROJECT
AUGUST 2017
SCALE:1"=150'
150750
PACHECOREGULATING TANK
PACHECOREGULATING TANK
(EXISTING)
PACHECO PUMP STATION(NEW)
13,750 HP FACILITY
-EXPAND PACHECO RESERVOIR
GRAVITY FLOW TO PACHECO RESERVOIR FLOW SCHEMATIC
EXPAND PACHECO RESERVOIRPUMPING TO PACHECO RESERVOIR FLOW SCHEMATIC
EXPAND PACHECO RESERVOIRGRAVITY FLOW FROM PACHECO RESERVOIR FLOW SCHEMATIC EXPAND PACHECO RESERVOIR
PUMPING FROM PACHECO RESERVOIR FLOW SCHEMATIC
PACHECO CONDUIT(EXISTING)
PACHECOREGULATING TANK
PACHECOREGULATING TANK
(EXISTING)
PACHECO CONDUIT(EXISTING)
PACHECOREGULATING TANK
PACHECOREGULATING TANK
(EXISTING)
PACHECO CONDUIT(EXISTING)
PACHECOREGULATING TANK
PACHECOREGULATING TANK
(EXISTING)
PACHECO CONDUIT(EXISTING)
PRESSURE RELIEF VALVE
PRESSURE REDUCINGVALVE
PRESSURERELIEF VALVE
PRESSUREREDUCING
VALVEPRESSURE
RELIEF VALVE
108 IN. DIAMETER
490 CFS
SURGE TANKS28,000 CF TOTAL VOLUME
NOTES:GRAVITY FLOW FROM PACHECO CONDUIT TO PACHECORESERVOIR CAN BE ACHIEVED WHEN RESERVOIRELEVATION IS APPORXIMATELY BELOW 600 FT.
PACHECO RESERVOIRMAX WATER EL. 694MIN WATER EL 450
PRESSURE RELIEF VALVE
PRESSURE RELIEF VALVE
PRESSURE RELIEF VALVE
SURGE TANKS28,000 CF TOTAL VOLUME
PACHECO PUMP STATION(NEW)
13,750 HP FACILITY108 IN. DIAMETER
490 CFS
PRESSUREREDUCING
VALVE
PACHECO RESERVOIRMAX WATER EL. 694MIN WATER EL 450
PRESSURE REDUCINGVALVE
NOTES:PUMPS WOULD OPERATE TO DELIVER WATER FROM PACHECOCONDUIT TO PACHECO RESERVOIR WHEN THE RESERVOIRELEVATION IS APPORXIMATELY ABOVE 600 FT.
PRESSURE RELIEF VALVE
PRESSURE RELIEF VALVE
PRESSURE RELIEF VALVE
SURGE TANKS28,000 CF TOTAL VOLUME
PACHECO PUMP STATION(NEW)
13,750 HP FACILITY108 IN. DIAMETER
490 CFS
PRESSUREREDUCING
VALVE
PACHECO RESERVOIRMAX WATER EL. 694MIN WATER EL 450
PRESSURE REDUCINGVALVE
NOTES:GRAVITY FLOW FROM PACHECO RESERVOIR TOPACHECO CONDUIT CAN BE ACHIEVED WHEN RESERVOIRELEVATION IS APPROXIMATELY ABOVE 620 FT.
PRESSURE RELIEF VALVE
PRESSURE RELIEF VALVE
PRESSURE RELIEF VALVE
SURGE TANKS28,000 CF TOTAL VOLUME
PACHECO PUMP STATION(NEW)
13,750 HP FACILITY108 IN. DIAMETER
490 CFS
PRESSUREREDUCING
VALVE
PACHECO RESERVOIRMAX WATER EL. 694MIN WATER EL 450
PRESSURE REDUCINGVALVE
NOTES:PUMPS WOULD OPERATE TO DELIVER WATER FROMPACHECO RESERVOIR TO PACHECO CONDUIT WHENTHE RESERVOIR ELEVATION IS APPROXIMATELYBELOW 620 FT.
PACHECO RESERVOIR EXPANSION PROJECTAUGUST 2017
HIGHWAY 152 TUNNEL
500
400
0
GRAVITY FLOW TO PACHECO RESERVOIR
5,000
EXISTING GRADE
GRAVITY FLOW HGL
TO PACHECO
RESERVOIR
PACHECO
RESERVOIR
700
600
PACHECO
REGULATING
TANK
HGL FOR PUMPING
TO PACHECO
RESERVOIR
PACHECO
RESERVOIR
PUMP TO PACHECO RESERVOIR
EXISTING GRADE
500
400
700
600
0
"NEW" PACHECO
PUMP STATION
5,000
PRIMARY PUMPING
RANGE
CONNECTION TO
EXISTING PACEHCO
CONDUIT
EXISTING GRADE
400
0
PACHECO
RESERVOIR
600
500
700
GRAVITY FLOW TO PACHECO CONDUIT
5,000
GRAVITY FLOW HGL
TO PACHECO CONDUIT
CONNECTION TO
EXISTING PACEHCO
CONDUIT
PRIMARY PUMPING
RANGE: 526' TO 620'
GRAVITY FLOW HGL
500
400
0
SECONDARY PUMPING
RANGE: 450' TO 526'
"NEW" PACHECO
PUMP STATION
5,000
EXISTING GRADE
PACHECO
RESERVOIR
700
600
CONNECTION TO
EXISTING PACEHCO
CONDUIT
PUMP TO PACHECO CONDUIT
HIGHWAY 152 TUNNEL
HIGHWAY 152 TUNNELHIGHWAY 152 TUNNEL
PACHECO
REGULATING
TANK
CONNECTION TO
EXISTING PACEHCO
CONDUIT
NOTES:
GRAVITY FLOW FROM PACHECO
CONDUIT TO PACHECO RESERVOIR
CAN BE ACHIEVED WHEN RESERVOIR
ELEVATION IS APPORXIMATELY
BELOW 600 FT.
NOTES:
PUMPS WOULD OPERATE TO DELIVER
WATER FROM PACHECO CONDUIT
TO PACHECO RESERVOIR WHEN THE
RESERVOIR ELEVATION IS
APPROXIMATELY ABOVE 600 FT.
NOTES:
GRAVITY FLOW FROM PACHECO
RESERVOIR TO PACHECO CONDUIT
CAN BE ACHIEVED WHEN RESERVOIR
ELEVATION IS APPROXIMATELY
ABOVE 620 FT.
NOTES:
PUMPS WOULD OPERATE TO DELIVER
WATER FROM PACHECO RESERVOIR
TO PACHECO CONDUIT WHEN THE
RESERVOIR ELEVATION IS APPROXIMATELY
BELOW 620 FT.
HGL FOR PUMPING
TO PACHECO
CONDUIT
Exhibit 8
PUMP/GRAVITY HYDRAULIC PROFILE
PACHECO RESERVOIR EXPANSION PROJECT
AUGUST 2017
SCALE
HOR: 1" = 2,000'
VERT: 1" = 100'
PARKING
ELECTRICAL ROOM
OPERATIONS & HVAC
ROOM
ELECTRICAL SUBSTATION
150'
150'
100'
220'
50'
150'
150'
AREA = 3.5 ACRES
345'
440'
25'
ACCESS ROAD
FENCE
SURGE TANKS
28,000 CF TOTAL
(7 TANKS)
TO/FROM PACHECO
RESERVOIR
TO/FROM PACHECO
CONDUIT
PUMP STATION
15' x 15'
VAULT BOX
(TYP.)
50'
50'
NOTES:
1) SURGE ANALYSIS WILL BE PERFORMED TO DETERMINE THE SIZE AND NUMBER
OF SURGE TANKS REQUIRED, DURING SUBSEQUENT STUDIES
120'
GATEHOUSE
AND RELEASE
TO CREEK
N
Exhibit 9
PUMP STATION LAYOUT PACHECO RESERVOIR EXPANSION PROJECT
AUGUST 2017
750725
700
675
650
625
600625
PACHECOPUMPING PLANT
REGULATINGTANK
TANK ACCESSROAD
LIMITS OFGRADING(AFFECTED AREAIS 2.5 ACRES)
PARKING AREA
ROW
575
775
750
725
SURGETANK
NEW INTERCONNECTION1.5 : 1
NEW MAINTENANCE PATH 650675
700725
750
600
650675
625
700
PACHECO TUNNEL
CONNECETION TOEXISTING PIPELINE
1.5 : 1NEW 3 MG, 150' DIAMETER
REGULATING TANK
EXISTING FEATURESNEW REGULATING TANK & MAINTENANCE PATHNEW CONTOURS
LEGENDREGULATING TANK
PACHECO RESERVOIR EXPANSION PROJECTAUGUST 2017
N
1"=500'
SCALE:
N
Exhibit 12
CONSTRUCTION ACCESS AND STAGING AREASPACHECO RESERVOIR EXPANSION PROJECT
AUGUST 2017
5000
MAX. WATER SURFACE ELEVATION OF 694 FT
IMPROVEMENT OF EXISTING ACCESS ROAD
(PERMANENT)
POTENTIAL STAGING AREAS
EXISTING PACHECO CONDUIT
NEW ACCESS ROAD (TEMPORARY)
IMPROVEMENT OF
EXISTING ACCESS ROAD
(TEMPORARY)
NEW ACCESS ROAD (PERMANENT)