Eligibility and General Project Information A4: Project Description Support€¦ · ·...

August 2017

Eligibility and General Project Information

A4: Project Description Support

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


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


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


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


(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)



(EXISTING)




(EXISTING)




(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






13,750 HP FACILITY108 IN. DIAMETER

490 CFS

PRESSUREREDUCING

VALVE



NOTES:PUMPS WOULD OPERATE TO DELIVER WATER FROM PACHECOCONDUIT TO PACHECO RESERVOIR WHEN THE RESERVOIRELEVATION IS APPORXIMATELY ABOVE 600 FT.







490 CFS

PRESSUREREDUCING

VALVE



NOTES:GRAVITY FLOW FROM PACHECO RESERVOIR TOPACHECO CONDUIT CAN BE ACHIEVED WHEN RESERVOIRELEVATION IS APPROXIMATELY ABOVE 620 FT.







490 CFS

PRESSUREREDUCING

VALVE



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)

Eligibility and General Project Information A4: Project Description Support€¦ · ·...

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