Overview
Buffalo Bill Dam, on the Shoshone River about 6 miles upstream from Cody, Wyoming, is a concrete arch structure of constant radius. The structural height is 350 feet and the volume is 87,515 cubic yards. It is one of the first high concrete dams built in the United States. The reservoir impounds 646,565 acre-feet of water. The Shoshone Power Plant is near the base of Buffalo Bill Dam.
Competent granitic rock of pre-Cambrian age. Some major to minor jointing and occasional thin shear seams are present. No critical unstable rock masses are known to be present in the immediate vicinity. Very little plucking of rock fragments occurred in the old unlined spillway tunnel.
General
| Project | Shoshone |
| Location | Six miles upstream from Cody, Wyoming. |
| Longitude | -109.1100 |
| Latitude | 44.3002 |
| Reservoir | Buffalo Bill |
| Original Construction | 1905-1910 |
| National ID Number | WY01300 |
| Base Width | 108.00 ft |
| Watercourse | Shoshone River |
| Modified Construction | 1915, 1922-1923, 1959, 1986-1994 (dam height raised 25 ft) |
Dimensions
| Crest Elevation | 5,395.00 ft |
| Structural Height | 350.00 ft |
| Hydraulic Height (Normal Operating Depth at Dam) | 265.00 ft |
| Crest Width | 10.00 ft |
| Top of Inactive Conservation Pool (Elevation) | 5,259.60 ft |
| Spillway Crest Elevation | 5,295.00 ft |
| Top of Dead Storage Pool (Elevation) | 5,158.00 ft |
| Crest Length | 200.00 ft |
| Top of Active Conservation Pool (Elevation) | 5,393.50 ft |
| Volume of Dam Construction Materials | 87,515.00 cu yd (does not include spillway structure) |
Hydraulics & Hydrology
| Spillway Capacity at Elevation | 84,725.00 cfs at 5,410.00 ft |
| Outlet Works Capacity at Elevation | Left abutment: 3,358.00 cfs; Lower level: 450.00 cfs at 5,393.50 ft |
| Spillway Type | Controlled concrete lined tunnel through left abutment. |
| Total Water Storage at Elevation | 646,565.00 acre-ft at 5,393.50 ft |
| Net Generation | 56,288,100 kWh |
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