Lucky Peak Master Plan
Technical Report - Volume 2
Supporting Data - Item 3
Pertinent Data
Dam | |
Type Top elevation (ft/msl) Height - Above foundation (ft) - Above streambed (ft) Crest length (ft) Width at top (ft) |
Rolled earth and gravel fill, impervious core 3,078 340 256 1,700 30 |
Spillway | |
Crest elevation (ft/msl) Length (ft) Design discharge (cfs) |
3,060 600 93,300 |
Outlet Works | |
Type Diameter of tunnel (ft) Length of tunnel (ft) Elevation of tunnel behind dam (ft/msl) Discharge capacity - At minimum lake level (cfs) - At normal lake level (cfs) Number and size of gates Gate operation Diameter of jet valve (in) |
Steel-lined pressure tunnel 22 1,365 2,824 17,000 30,000 Six - 5'3" x 10'0" Hydraulic cylinders 30 |
Lucky Peak Lake Data | |
Elevation of Lake (msl) | |
Flood storage Normal operating Minimum operating Empty (Boise River) |
3060 3055 2905 2824 |
Area of Lake (Acres) | |
Normal at El. 3055 Minimum at El. 2905 |
3,0191 820 |
Length of | |
Shoreline (miles) at El. 3055 Boise River (miles) Mores Creek (miles) |
45 12 5½ |
Storage Capacity (acre-feet) | |
Top 5 feet, El., 3055 to 3060 Active (usable), El. 2905 to 3055 Minimum, EL. 2824 to 2905 Total gross, El. 2824 to 3060 |
13,905 264,371 28,767 307,043 |
Water Allocation (acre-feet)2 | |
Contracted irrigation Streamflow maintenance Storage for recreation |
111,950 152,300 28,800 |
1See SD-8 for calculations. 2As shown in Idaho Department of Water Resources Permit No. 63-3618/R-1183. |