July 2006 1 Middle Fork Project Additional Information Potential Project Betterments to be evaluated...
64
July 2006 July 2006 1 Middle Fork Project Middle Fork Project Additional Information Additional Information Potential Project Potential Project Betterments Betterments to be evaluated during to be evaluated during Relicensing Relicensing July 2006 July 2006
-
Upload
mavis-simpson -
Category
Documents
-
view
225 -
download
4
Transcript of July 2006 1 Middle Fork Project Additional Information Potential Project Betterments to be evaluated...
July 2006July 2006 11
Middle Fork Project Middle Fork Project
Additional InformationAdditional InformationPotential Project Betterments Potential Project Betterments
to be evaluated during to be evaluated during Relicensing Relicensing
July 2006July 2006
July 2006July 2006 22
OutlineOutline
Inventory of BettermentsInventory of Betterments Duncan Diversion trash rackDuncan Diversion trash rack Small hydro projects (Interbay & Small hydro projects (Interbay &
Ralston)Ralston) Ralston turbine upgradeRalston turbine upgrade French Meadows & Hell Hole raisesFrench Meadows & Hell Hole raises French Meadows Pumped StorageFrench Meadows Pumped Storage Sediment managementSediment management
Preliminary Environmental ReviewPreliminary Environmental Review
July 2006July 2006 33
Betterments areBetterments are “Developmental Values” “Developmental Values”
FEDERAL POWER ACT Section 4(e)In deciding whether to issue a license, the Commission must give equal consideration to developmental and environmental values. Environmental values include: fish and wildlife resources, including their spawning grounds and habitat, visual resources, cultural resources, recreational opportunities, and other aspects of environmental quality. Developmental values include power generation, irrigation, flood control, and water supply.
July 2006July 2006 44
Purpose of BettermentsPurpose of Betterments Improvements to water supply or Improvements to water supply or
supply reliabilitysupply reliability Improvements to electric power Improvements to electric power
generationgeneration Improvements to project operationsImprovements to project operations
July 2006July 2006 55
Betterments Analysis for RelicensingBetterments Analysis for Relicensing Flow Chart Flow Chart
Betterments to carry forward in relicensing Project Description,
June 2006
Engineering/environmental studies and agency/public
consultation 2007-2010
Include viable projects in
License Application
Initial data collection & screening -
Conceptual design work
PCWA inventory of potential betterments
We are Here
July 2006July 2006 66
Proposed Relicensing UpgradesProposed Relicensing Upgrades
July 2006July 2006 77
Duncan Creek DiversionDuncan Creek Diversion More water is available at the Duncan More water is available at the Duncan
diversion diversion Main problem is blockage of the intake Main problem is blockage of the intake
with trash during stormswith trash during stormsUpgrade trash rack Upgrade trash rack structure to structure to alleviate trash alleviate trash blockagesblockages
May be May be constructed prior constructed prior to 2013 as a to 2013 as a maintenance itemmaintenance item
July 2006July 2006 88
Duncan Creek DiversionDuncan Creek Diversion
Intake
July 2006July 2006 99
Duncan Creek DiversionDuncan Creek Diversion Existing IntakeExisting Intake
July 2006July 2006 1010
Duncan Creek DiversionDuncan Creek Diversion
Proposed Trashrack ImprovementProposed Trashrack Improvement
July 2006July 2006 1111
Add/Upgrade Small HydroAdd/Upgrade Small Hydro
ProposedProposed Upgrade Hell Hole Upgrade Hell Hole
powerhouse capacitypowerhouse capacity Add small hydro plants on Add small hydro plants on
flow outlets at Interbay flow outlets at Interbay and Ralston Afterbay and Ralston Afterbay DamsDams
French Meadows French Meadows discarded - too remote, discarded - too remote, no power lineno power line
AnalysisAnalysis Adjacent to existing MF Adjacent to existing MF
Project facilities = easy Project facilities = easy access, construction, and access, construction, and operations.operations.
Rough economic analysis Rough economic analysis based on $/KWhr costsbased on $/KWhr costs
July 2006July 2006 1212
Interbay Small HydroInterbay Small Hydro
July 2006July 2006 1313
Add/Upgrade Small HydroAdd/Upgrade Small Hydro
Next StepNext Step Include provision for Include provision for
fish release hydro fish release hydro facilities in Project facilities in Project Description for Description for Relicensing. Relicensing.
Relicensing Instream Relicensing Instream flow studiesflow studies
Finalize when flow Finalize when flow release patterns release patterns established.established.
July 2006July 2006 1414
Ralston Capacity IncreaseRalston Capacity Increase Hydraulic capacity of Hydraulic capacity of
Middle Fork Middle Fork Powerhouse (1000 Powerhouse (1000 cfs) is higher than cfs) is higher than Ralston (925 cfs). Ralston (925 cfs).
Ralston should have Ralston should have higher hydraulic higher hydraulic capacity than Middle capacity than Middle Fork otherwise spills Fork otherwise spills at Interbayat Interbay
Ralston Powerhouse is Ralston Powerhouse is hydraulically limited – hydraulically limited – turbine limits outputturbine limits output
July 2006July 2006 1515
Options at RalstonOptions at Ralston
Turbine- generator upgrade (if feasible)Turbine- generator upgrade (if feasible) Add second 11-MW unitAdd second 11-MW unit
July 2006July 2006 1616
Ralston Capacity IncreaseRalston Capacity IncreasePotential Footprint (if Additional Unit option)Potential Footprint (if Additional Unit option)
Footprint
July 2006July 2006 1717
Ralston Capacity IncreaseRalston Capacity IncreaseOperations ImpactsOperations Impacts
Daily average water volume will be the Daily average water volume will be the same after upgradesame after upgrade
However, can move the daily volume However, can move the daily volume through in fewer hoursthrough in fewer hours More flexibility in generationMore flexibility in generation More flexibility in ancillary servicesMore flexibility in ancillary services Additional 100 cfs (10% of flow capacity) Additional 100 cfs (10% of flow capacity)
allows concentration of generation in high allows concentration of generation in high value hours value hours
Generally the same daily average project Generally the same daily average project throughputthroughput
Generally the same daily average Ralston Generally the same daily average Ralston reservoir elevationsreservoir elevations
July 2006July 2006 1818
Ralston Next StepsRalston Next Steps
Evaluate upgrade Evaluate upgrade potential of existing potential of existing turbine/generator turbine/generator electrical equipmentelectrical equipment
Refine second unit Refine second unit option.option.
Evaluate electrical Evaluate electrical output constraintsoutput constraints
Additional economic Additional economic analysis & tracking analysis & tracking of power market of power market trendstrends
July 2006July 2006 1919
French Meadows Storage French Meadows Storage IncreaseIncrease
Additional storage of 5,000 AF potentially available as a result of safety repair
Safety Repair = Spillway modification required by FERC to handle Probable Maximum Flood
July 2006July 2006 2020
French Meadows SpillwayFrench Meadows Spillway
Spillway modification in preliminary design
Implementation schedule not yet developed with FERC
Project will require separate License Amendment (not in relicensing)
July 2006July 2006 2121
French Meadows Storage IncreaseFrench Meadows Storage IncreasePotential FootprintPotential Footprint
July 2006July 2006 2222
Potential Storage change, French Meadows Potential Storage change, French Meadows Reservoir, with 5,000 AF Additional StorageReservoir, with 5,000 AF Additional Storage
French Meadows Reservoir ElevationActual 2003 Elev vs. Enhanced (5,000 AF) Elev
0
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
1-Ja
n
31-J
an
1-M
ar
31-M
ar
30-A
pr
30-M
ay
29-J
un
29-J
ul
28-A
ug
27-S
ep
27-O
ct
26-N
ov
26-D
ec
Date
Sto
rag
e (A
F)
FM Incr 5000 FM 2003
Sample change to reservoir storage curve
July 2006July 2006 2323
French Meadows & Hell Hole French Meadows & Hell Hole ReservoirsReservoirs
Proposed Operational ChangesProposed Operational ChangesFrench French
MeadowMeadowss
Hell Hell HoleHole
Flood LevelFlood Level (All season (All season PMF)PMF)
(ft)(ft) 00 00
Normal Normal Maximum Maximum Operating LevelOperating Level
(ft)(ft)
% Range% Range+3.5+3.5
2.5%2.5%+10+10
3.4%3.4%
Max Operating Max Operating Storage VolumeStorage Volume
(ac-ft)(ac-ft)%%
+5,000+5,0003.7%3.7%
+12,00+12,0000
5.8%5.8%
Max Operating Max Operating Surface AreaSurface Area
(acres)(acres)
%%+20+/-+20+/-1.5%1.5%
+38+38
3%3%
July 2006July 2006 2424
Hell Hole Storage IncreaseHell Hole Storage Increase
10 foot seasonal increase in operating level May–September would add 12 TAF
July 2006July 2006 2525
Hell Hole ReservoirHell Hole ReservoirPotential FootprintPotential Footprint
July 2006July 2006 2626
Add Crest Gates for Storage Add Crest Gates for Storage IncreaseIncrease
July 2006July 2006 2727
Typical Spillway Crest GatesTypical Spillway Crest GatesGranite Reef Diversion - ArizonaGranite Reef Diversion - Arizona
July 2006July 2006 2828
Next StepsNext Steps
Hydrology and Flood RoutingHydrology and Flood Routing Optimization of seasonal operating Optimization of seasonal operating
elevationselevations Field InvestigationsField Investigations Environmental StudiesEnvironmental Studies Refine layoutsRefine layouts Cost estimates and construction Cost estimates and construction
scheduleschedule Incorporate in License ApplicationIncorporate in License Application
July 2006July 2006 2929
French Meadows - Hell Hole French Meadows - Hell Hole Pumped-Storage Pumped-Storage
Opportunity for pumped-storage between the reservoirsOpportunity for pumped-storage between the reservoirs 52 MW project maximizes use of hydraulic capacity in 52 MW project maximizes use of hydraulic capacity in
French Meadows TunnelFrench Meadows Tunnel Recovers lost head below French Meadows PowerhouseRecovers lost head below French Meadows Powerhouse 14 mile transmission line upgrade to Middle Fork14 mile transmission line upgrade to Middle Fork
July 2006July 2006 3030
French Meadows/Hell Hole Pumped French Meadows/Hell Hole Pumped StorageStorageOverviewOverview
Use of existing reservoir and tunnel Use of existing reservoir and tunnel facilitiesfacilities
Relatively large reservoirs = minimal Relatively large reservoirs = minimal water level fluctuationswater level fluctuations
Potential additional flexibility for peaking Potential additional flexibility for peaking generation & ancillary services operationsgeneration & ancillary services operations
July 2006July 2006 3131
French Meadows/Hell Hole Pumped French Meadows/Hell Hole Pumped StorageStorageFootprintFootprint
July 2006July 2006 3232
French Meadows - Hell Hole Pumped French Meadows - Hell Hole Pumped StorageStorage
July 2006July 2006 3333
July 2006July 2006 3434
French Meadows - Hell Hole Pumped StorageFrench Meadows - Hell Hole Pumped StorageOperational AspectsOperational Aspects
Net flow of water ‘downhill’ from FM to HH Net flow of water ‘downhill’ from FM to HH (thence through tunnels to rest of MFP)(thence through tunnels to rest of MFP)
Average net flows around 550 AF/day (wet yrs, Average net flows around 550 AF/day (wet yrs, Jul – Dec time period)Jul – Dec time period)
Surface change 4” to 6” per day (average)Surface change 4” to 6” per day (average)
Average net flows around 250 AF/day (dry yrs, Average net flows around 250 AF/day (dry yrs, Apr – Dec time period)Apr – Dec time period)
Surface change 2” to 4” per daySurface change 2” to 4” per day
July 2006July 2006 3535
French Meadows - Hell Hole Pumped StorageFrench Meadows - Hell Hole Pumped StorageOperational AspectsOperational Aspects
Pump-back operations most likely on daily basis Pump-back operations most likely on daily basis (pump/release cycle every day), more likely in (pump/release cycle every day), more likely in summer/fall months summer/fall months
Maximum Maximum available for pumping: 6 – 10 hrs/day, available for pumping: 6 – 10 hrs/day, moves 420 – 700 AF moves 420 – 700 AF
Pumped volume < 0.5% of reservoir volumePumped volume < 0.5% of reservoir volume
July 2006July 2006 3636
French Meadows - Hell Hole Pumped French Meadows - Hell Hole Pumped StorageStorage
Next StepsNext Steps Preliminary design of selected Preliminary design of selected
bettermentsbetterments Refined cost estimatesRefined cost estimates Refined operations analysisRefined operations analysis
July 2006July 2006 3737
Middle Fork Project Middle Fork Project
Potential Betterments –Potential Betterments –Preliminary EnvironmentalPreliminary Environmental
Effects AnalysisEffects Analysis
July 18, 2006July 18, 2006
July 2006July 2006 3838
Potential BettermentsPotential BettermentsEnvironmental Analysis ApproachEnvironmental Analysis Approach
Potential Betterment
Effects
Potential Environment
al Issues
Key Technical Resource Studies
Environmental Analysis
Avoidance, Protection,
and Mitigation Measures
July 2006July 2006 3939
Potential Effects
Short-Term Temporary Construction Effects
Long-Term Operational Effects
Long-Term Maintenance Effects
Potential Project BettermentsPotential Project Betterments
July 2006July 2006 4040
Short-Term Temporary Construction Effects Traffic Noise Air Quality (dust, emissions) Ground-Disturbance Water Quality Erosion Operational Modifications (local and system) Recreation
Potential Environmental IssuesPotential Environmental Issues
July 2006July 2006 4141
Long-Term Operational Effects Reservoir Levels Instream Flows Generation Water Supply Water Quality - Temperature Entrainment
Long-Term Maintenance Effects Increased Maintenance Area
Potential Environmental IssuesPotential Environmental Issues
July 2006July 2006 4242
Terrestrial Resources
Special-Status Species (botanical and wildlife)
Invasive/Noxious Weeds
Tribal Plant and Wildlife
Key Technical Studies Key Technical Studies (Existing Project)(Existing Project)
July 2006July 2006 4343
Aquatic Resources Physical Habitat Water Quality Fish Populations Special-Status Amphibians and Reptiles Hydrology Fish Passage Entrainment Geomorphology Riparian
Key Technical StudiesKey Technical Studies(Existing Project)(Existing Project)
July 2006July 2006 4444
Recreation Resources
Recreation Opportunities
Recreation Use and Future Demand
Facility Assessment and Needs Analysis
Land Use
Aesthetics
Fire Protection/Prevention
Transportation and Circulation
Key Technical Relicensing StudiesKey Technical Relicensing Studies(Existing Project)(Existing Project)
July 2006July 2006 4545
Operations Model
Characterize Effects on:
Generation
Water Supply
Reservoir Levels
Instream Flows
Key Analytical ToolKey Analytical Tool(Existing Project)(Existing Project)
July 2006July 2006 4646
Increased Survey Area
Additional Operational Modeling
Additional Environmental Analysis
Additional Technical Studies
Project BettermentsProject BettermentsAdditional Technical Study Additional Technical Study
RequirementsRequirements
July 2006July 2006 4747
Short-Term Temporary Construction Effects Increased Survey Area
Traffic Ground Disturbance
Additional Operational Analyses Additional Environmental Analyses
Noise Air Quality (dust, emissions) Water Quality Erosion Recreation
Additional Study RequirementsAdditional Study Requirements
July 2006July 2006 4848
Long-Term Operational Effects
Additional Operational Modeling
Reservoir Levels
Instream Flows
Generation
Water Quality – Temperature
Additional Study RequirementsAdditional Study Requirements
July 2006July 2006 4949
Pump Storage
Entrainment
Reservoir Water Quality Modeling - Temperature
Potential Additional Technical Potential Additional Technical StudiesStudies
July 2006July 2006 5050
Additional Study Plan Discussions in Technical Working Groups
Next StepsNext Steps
July 2006July 2006 5151
Middle Fork Project Middle Fork Project
Potential Betterments –Potential Betterments –Preliminary EnvironmentalPreliminary Environmental
Effects AnalysisEffects Analysis
July 18, 2006July 18, 2006
July 2006July 2006 5252
Potential BettermentsPotential BettermentsEnvironmental Analysis ApproachEnvironmental Analysis Approach
Potential Betterment
Effects
Potential Environment
al Issues
Key Technical Resource Studies
Environmental Analysis
Avoidance, Protection,
and Mitigation Measures
July 2006July 2006 5353
Potential Effects
Short-Term Temporary Construction Effects
Long-Term Operational Effects
Long-Term Maintenance Effects
Potential Project BettermentsPotential Project Betterments
July 2006July 2006 5454
Short-Term Temporary Construction Effects Traffic Noise Air Quality (dust, emissions) Ground-Disturbance Water Quality Erosion Operational Modifications (local and system) Recreation
Potential Environmental IssuesPotential Environmental Issues
July 2006July 2006 5555
Long-Term Operational Effects Reservoir Levels Instream Flows Generation Water Supply Water Quality - Temperature Entrainment
Long-Term Maintenance Effects Increased Maintenance Area
Potential Environmental IssuesPotential Environmental Issues
July 2006July 2006 5656
Terrestrial Resources
Special-Status Species (botanical and wildlife)
Invasive/Noxious Weeds
Tribal Plant and Wildlife
Key Technical Studies Key Technical Studies (Existing Project)(Existing Project)
July 2006July 2006 5757
Aquatic Resources Physical Habitat Water Quality Fish Populations Special-Status Amphibians and Reptiles Hydrology Fish Passage Entrainment Geomorphology Riparian
Key Technical StudiesKey Technical Studies(Existing Project)(Existing Project)
July 2006July 2006 5858
Recreation Resources
Recreation Opportunities
Recreation Use and Future Demand
Facility Assessment and Needs Analysis
Land Use
Aesthetics
Fire Protection/Prevention
Transportation and Circulation
Key Technical Relicensing StudiesKey Technical Relicensing Studies(Existing Project)(Existing Project)
July 2006July 2006 5959
Operations Model
Characterize Effects on:
Generation
Water Supply
Reservoir Levels
Instream Flows
Key Analytical ToolKey Analytical Tool(Existing Project)(Existing Project)
July 2006July 2006 6060
Increased Survey Area
Additional Operational Modeling
Additional Environmental Analysis
Additional Technical Studies
Project BettermentsProject BettermentsAdditional Technical Study Additional Technical Study
RequirementsRequirements
July 2006July 2006 6161
Short-Term Temporary Construction Effects Increased Survey Area
Traffic Ground Disturbance
Additional Operational Analyses Additional Environmental Analyses
Noise Air Quality (dust, emissions) Water Quality Erosion Recreation
Additional Study RequirementsAdditional Study Requirements
July 2006July 2006 6262
Long-Term Operational Effects
Additional Operational Modeling
Reservoir Levels
Instream Flows
Generation
Water Quality – Temperature
Additional Study RequirementsAdditional Study Requirements
July 2006July 2006 6363
Pump Storage
Entrainment
Reservoir Water Quality Modeling - Temperature
Potential Additional Technical Potential Additional Technical StudiesStudies
July 2006July 2006 6464
Additional Study Plan Discussions in Technical Working Groups
Next StepsNext Steps
