june 26, 2007 2-1 pcwa - middle fork project project operations 6-26-2007
Post on 20-Dec-2015
216 views
TRANSCRIPT
June 26, 2007June 26, 2007 2-2-11
PCWA - Middle Fork Project PCWA - Middle Fork Project
Project OperationsProject Operations
6-26-20076-26-2007
June26, 2007June26, 2007 2-2-22
Presentation AgendaPresentation Agenda
Review PCWA Interests and Review PCWA Interests and Operating ObjectivesOperating Objectives
Overview OperationsOverview Operations Describe Key Characteristics of Describe Key Characteristics of
MFP OperationsMFP Operations
June26, 2007June26, 2007 2-2-33
InterestsInterests
Water SupplyWater Supply Energy GenerationEnergy Generation Protection of environmental, Protection of environmental,
recreational and cultural recreational and cultural resourcesresources
June26, 2007June26, 2007 2-2-44
Operating ObjectivesOperating Objectives
Comply with FERC license Comply with FERC license conditions conditions
Serve water demands in Placer Serve water demands in Placer CountyCounty
Generate power during peak Generate power during peak energy demand periodenergy demand period
Maintain project facilitiesMaintain project facilities
June26, 2007June26, 2007 2-2-66
Contact PCWA forContact PCWA forNon-Internet Public Figure Non-Internet Public Figure
5-15-1Principle Project FacilitiesPrinciple Project Facilities
June26, 2007June26, 2007 2-2-77
Hydrology / Diversion Rights•Permits•Water available for use
Water Uses•Stream Maintenance Flow•Consumptive Use•Generation
MFP Facilities – Physical Capacities•Reservoir Storage•Diversion, tunnel and powerhouse flows
Annual Operations
Cycle• Reservoir Fill Period
• Reservoir Release Period
- stream maintenance
- delivery for water use
- peaking generation
- recreation flows
• Maintenance Period
Annual Operations CycleAnnual Operations Cycle
June26, 2007June26, 2007 2-2-88
Annual MFP InflowAnnual MFP Inflow
0
100000
200000
300000
400000
500000
600000
700000
800000
900000
Infl
ow
(A
F)
Hell Hole French Meadows Duncan Creek NF Long Canyon SF Long Canyon
June26, 2007June26, 2007 2-2-99
Reservoir RefillReservoir Refill French Meadows Reservoir
5140
5160
5180
5200
5220
5240
5260
5280
1-O
ct
15-O
ct
29-O
ct
12-N
ov
26-N
ov
10-D
ec
24-D
ec
7-Ja
n
21-J
an
4-F
eb
18-F
eb
4-M
ar
18-M
ar
1-A
pr
15-A
pr
29-A
pr
13-M
ay
27-M
ay
10-J
un
24-J
un
8-Ju
l
22-J
ul
5-A
ug
19-A
ug
2-S
ep
16-S
ep
30-S
ep
Ele
vati
on
(ft
)
1989 1983 2001
Average Year
Wet Year
Dry Year
June26, 2007June26, 2007 2-2-1010
Combined Reservoir StorageCombined Reservoir Storage
50,000
100,000
150,000
200,000
250,000
300,000
350,000
1/1
/67
1/1
/69
1/1
/71
1/1
/73
1/1
/75
1/1
/77
1/1
/79
1/1
/81
1/1
/83
1/1
/85
1/1
/87
1/1
/89
1/1
/91
1/1
/93
1/1
/95
1/1
/97
1/1
/99
1/1
/01
1/1
/03
1/1
/05
Date
Sto
ra
ge
Vo
lum
e,
AF
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
June26, 2007June26, 2007 2-2-1111
Water Supply Water Supply Delivery Obligations to:Delivery Obligations to:
PCWA - Zone 1PCWA - Zone 1 San Juan Water DistrictSan Juan Water District City of RosevilleCity of Roseville Sacramento Suburban Water DistrictSacramento Suburban Water District
Diversion points for delivery at Diversion points for delivery at American River Pump Station American River Pump Station (Auburn) and Folsom Reservoir(Auburn) and Folsom Reservoir
Limited to 120,000 acre-feet yearLimited to 120,000 acre-feet year
June26, 2007June26, 2007 2-2-1212
Seasonal Consumptive Seasonal Consumptive Demand PatternDemand Pattern
01,0002,0003,0004,0005,0006,0007,000
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecMonth
.
Deliveries, AF
June26, 2007June26, 2007 2-2-1313
Releases for GenerationReleases for Generation
May occur all year May occur all year Seasonal demand pattern Seasonal demand pattern Water released to meet water supply Water released to meet water supply
needs passes through the needs passes through the powerhouses contributing to powerhouses contributing to generationgeneration
June26, 2007June26, 2007 2-2-1414
Total Annual Generation Total Annual Generation Flows Flows (Middle Fork Powerhouse)(Middle Fork Powerhouse)
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
1967
1969
1971
1973
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
To
tal A
nn
ual
Flo
w t
hro
ug
h p
ow
erh
ou
se, A
F
June26, 2007June26, 2007 2-2-1515
Seasonal Energy Demand Seasonal Energy Demand Pattern Pattern
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
1/1/
06
2/1/
06
3/1/
06
4/1/
06
5/1/
06
6/1/
06
7/1/
06
8/1/
06
9/1/
06
10/1
/06
11/1
/06
12/1
/06
Lo
ad in
MW
June26, 2007June26, 2007 2-2-1616
Monthly Releases for Generation - Dry Period Monthly Releases for Generation - Dry Period (1987 – 1992)(1987 – 1992)
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
Jan-87 Jul-87 Jan-88 Jul-88 Jan-89 Jul-89 Jan-90 Jul-90 Jan-91 Jul-91 Jan-92 Jul-92
Month, Year
Res
Sto
rag
e, A
F
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
Ave
rag
e M
on
thly
Rel
ease
s, A
F
Pwr + Minimum Releases Comb Res Storage
Reservoir Releases
Reservoir Storage Volume
June26, 2007June26, 2007 2-2-1717
Monthly Releases for Generation - Wet Monthly Releases for Generation - Wet Period (1995 – 1998)Period (1995 – 1998)
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
Jan-95 Jul-95 Jan-96 Jul-96 Jan-97 Jul-97 Jan-98 Jul-98
Month, Year
Res
Sto
rag
e, A
F
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
Ave
rag
e M
on
thly
Rel
ease
s, A
F
Pwr + Minimum Releases Comb Res Storage
Reservoir Releases
Reservoir Storage Volume
June26, 2007June26, 2007 2-2-1818
Peaking Generation versus Peaking Generation versus Daily Energy DemandDaily Energy Demand
Energyproduction
Energydemand
SunSatFriThuWedTueMon
June26, 2007June26, 2007 2-2-1919
Peaking GenerationPeaking GenerationWet vs. Dry YearWet vs. Dry Year
SunSatFriThuWedTueMon
Wet year
Dry year
June26, 2007June26, 2007 2-2-2020
Recreation FlowsRecreation Flows
Below Oxbow Powerhouse, Project Below Oxbow Powerhouse, Project releases are frequently compatible releases are frequently compatible with commercial rafting needswith commercial rafting needs
Occasionally Project releases may be Occasionally Project releases may be modified to facilitate commercial modified to facilitate commercial rafting and other recreation uses rafting and other recreation uses
June26, 2007June26, 2007 2-2-2121
Annual Testing and Annual Testing and MaintenanceMaintenance
Fall (by Nov. 1) - 5 weeks for Middle Fall (by Nov. 1) - 5 weeks for Middle Fork, Ralston and Oxbow Fork, Ralston and Oxbow PowerhousesPowerhouses Period of lower energy and consumptive Period of lower energy and consumptive
water demandwater demand Favorable weather conditionsFavorable weather conditions Low runoffLow runoff
Spring - 2 weeks for French Meadows Spring - 2 weeks for French Meadows and Hell Hole Powerhouses and Hell Hole Powerhouses
June26, 2007June26, 2007 2-2-2323
““Storage Flexibility”Storage Flexibility”
Flexibility to manage storage and Flexibility to manage storage and releaserelease Capture spring runoffCapture spring runoff Release during Summer and FallRelease during Summer and Fall
Limited by minimum storage level Limited by minimum storage level requirementsrequirements
Balance between releases vs. Balance between releases vs. retaining water for dry yearsretaining water for dry years
June26, 2007June26, 2007 2-2-2424
Drawdown during summer to meet Drawdown during summer to meet water supply, energy demand and to water supply, energy demand and to provide storage space for the provide storage space for the following year.following year.
Release water from storage all year to Release water from storage all year to meet consumption demand patternsmeet consumption demand patterns
Drawdown in fall to provide storage Drawdown in fall to provide storage for spring runofffor spring runoff
Higher drawdown during drought to Higher drawdown during drought to meet needsmeet needs
June26, 2007June26, 2007 2-2-2525
““Combined Operation of Middle Combined Operation of Middle Fork and Ralston Fork and Ralston
Powerhouses”Powerhouses” Operated to generate on peakOperated to generate on peak Operated at the same time to avoid Operated at the same time to avoid
spillspill Vary output hourly/daily to meet Vary output hourly/daily to meet
energy needsenergy needs
June26, 2007June26, 2007 2-2-2626
““Operation of Oxbow Operation of Oxbow Powerhouse and Ralston Powerhouse and Ralston
Afterbay”Afterbay”
Operation of Oxbow Powerhouse on Operation of Oxbow Powerhouse on the same schedule minimizes the same schedule minimizes reservoir changes at Ralston reservoir changes at Ralston AfterbayAfterbay
Ralston Afterbay can re-regulate Ralston Afterbay can re-regulate flows below Oxbowflows below Oxbow
June 26, 2007June 26, 2007 2-2-2727
““Schedule seasonal releases Schedule seasonal releases to follow combined pattern of to follow combined pattern of water and energy demand”water and energy demand”