Pertinent Data
General | ||
River mile | 1.9 | |
Drainage area, square miles | 2,440 | |
Effective hydraulic height, feet | 632 | |
Maximum structural height, feet | 717 | |
Overall length at crest, feet | 3,287 | |
Streamflow, cfs: | ||
Minimum of record Mean annual Standard project flood peaks:
Probable maximum flood |
250 5,727 160,000 120,000 100,000 411,000 |
|
Streamflow, acre-feet: | ||
Minimum annual Mean annual Maximum annual |
2,157,000 4,100,000 6,680,000 | |
Project design discharges, cfs: | ||
At pool elevation 1445 At pool elevation 1600:
|
32,290 150,000 40,000 190,000 220,000 | |
Tailwater elevations: | ||
Minimum, discharge 1,000 cfs Maximum, at discharge 150,000 cfs |
968 1,003.4 | |
First power online | 1 March 1973 |
Estimated Cost | ||
1 July 1973 | $302,000,000 |
Reservoir | ||
Elevations, feet: | ||
Maximum design pool Maximum operating pool Normal operating range |
1605 1600 1600 to 1445 | |
Storage capacity, acre-feet: | ||
Gross Usable, flood control and power |
3,468,000 2,016,000 | |
Length at elevation 1600, miles | 53.6 | |
Shoreline length, miles | 175 | |
Surface areas, acres: | ||
At elevation 1600 At elevation 1445 |
17,090 9,050 | |
Recreation sites, number: | ||
Initial Ultimate | 7 19 |
Non-Overflows | ||
Type | Concrete gravity | |
Crest elevation | 1613 | |
Deck width, feet | 44 | |
Concrete volume, cubic yards | 6,500,000 | |
Upstream slope | Vertical | |
Downstream slope | Vertical above elevation 1560, 1 on 0.8 below | |
Elevators, number | 3 |
Spillway | ||
Type | Gate controlled, with stilling basin | |
Gates: | ||
Type Size, width by height, feet Number |
Tainter 50 x 56.4 2 | |
Crest elevation | 1545 | |
Crane, one, capacity, tons | 150 |
Permanent Outlet Works | ||
Water passages: | ||
Number Type Size, feet | 3 Conduit 12 x 17 | |
Gates, type and number: | ||
Tainter Tractor (emergency) | 3 1 | |
Intake centerline elevation | 1362 |
Powerplant | ||
Initial installation: | ||
Number of units Nameplate rating, kilowatts:
|
3 90,000 220,000 400,000 | |
Ultimate installation: | ||
Number of units Nameplate rating, KVA:
|
6 90,000 220,000 1,060,000 | |
Powerhouse length, feet | 428 | |
Turbine type | Francis | |
Turbine ratings, horsepower: | ||
Small units Large units | 142,000 346,000 | |
Synchronous speed, revolutions per minute: | ||
Small units Large units | 200 128.6 | |
Distributor centerline elevations: | ||
Small units Large units | 969 975 | |
Spacing, feet: | ||
Small units Large units | 47 65 | |
Penstock diameters: | ||
Small units Large units | 12 19 | |
Penstock intake elevations: | ||
Small units Large units | 1,420.68 1,412.70 |
|
Gross head, feet | 632 | |
Rated head, feet | 560 | |
Minimum head, feet | 477 | |
Crane: | ||
Number Type Capacity, each, tons |
2 Bridge 350 |
Relocations | ||
Roads, miles: | ||
Highway districts County | 2.7 24.3 | |
Bridges, number | 2 |
Fish Hatchery, Steelhead | ||
Attraction water pump capacity, cfs | 255 | |
Capacity, adult size | 6,000 | |
Yearly fingerling release: | ||
Estimated number Estimated total weight, pounds |
3,360,000 420,000 |