McNary Master Plan
Supporting Data
Item 5
Pertinent Data
General | ||
River Mile | 292 | |
Drainage area, square miles | 214,000 | |
Normal hydraulic height, feet | 75 | |
Maximum structural height, feet | 220 | |
Overall length at crest, feet | 7,300 | |
Discharge, cfs: | ||
Minimum of record Mean annual Maximum of record (1894) Spillway design flood |
30,000 191,000 1,150,000 2,200,000 | |
First power on line | December 1953 | |
Concrete, cubic yards | 1,861,000 | |
Earth, cubic yards | 2,937,000 |
Estimated Cost | ||
1 January 1977 | $304,700,000 |
Lake | ||
Elevations: | ||
Maximum Normal operating range |
356.5 340-335 | |
Length, miles | 61.6 | |
Area at normal pool, acres | 37,000 | |
Relocations, miles: | ||
Railroad State highway and county roads Power and communications lines | 80.5 42.5 57 | |
Drawdown for power, feet | 5 | |
Capacity, power pondage, acre-feet | 185,000 | |
Revetted levees, miles | 17 | |
Length of shoreline, miles | 242 |
Navigation Lock | ||
Type | Single lift | |
Normal lift, feet | 75 | |
Clear width, feet | 86 | |
Net clear length, feet | 683 | |
Minimum depth over sills, feet | 15 | |
Upstream gate | Miter | |
Downstream gate | Arch | |
Guide wall lengths, feet: | ||
Upstream Downstream | 1,417 1,520 |
Spillway | ||
Deck elevation | 361 | |
Crest elevation | 291 | |
Overall length, feet | 1,310 | |
Control gates: | ||
Number Type Size, width by height above crest, feet |
22 Vertical lift 50' x 51' | |
Maximum design capacity, cfs | 2,200,000 | |
Deck cranes, each, 2, capacity, tons | 200 |
Powerhouse | ||
Number of units | 14 | |
Nameplate rating, kilowatts: | ||
Each Total | 70,000 980,000 | |
Intake deck elevation | 361 | |
Tailrace deck elevation | 287 | |
Unit spacing, feet | 86 | |
Length assembly bay, feet | 134 | |
Length overall, feet | 1,422 | |
Turbines: | ||
Type Runner diameter, inches Revolutions per minute Horsepower rating | Kaplan 280 85.7 95,400 | |
Crane capacities, tons: | ||
Intake deck Bridge, powerhouse interior, each, 2 Tailrace deck | 140 350 30 |
Abutments | ||
Abutments | Rock fill with impervious core |
Fish Facilities | ||
Number of ladders | 2 | |
Ladder slopes | 1 on 20 | |
Ladder widths, feet | 30 |