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 | |