Shoshone Falls Dam 4
Shoshone Falls Dam 4 is a gravity dam located in Twin Falls County, Idaho, built in 1907. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Shoshone Falls Dam 4
The primary purpose of Shoshone Falls Dam 4 is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Idaho Power Company (private). It impounds the Snake River.
The dam stands 18 feet tall and stretches 380 feet across, creates a reservoir covering 86 acres, has a maximum storage capacity of 1,500 acre-feet, and collects water from a drainage area of 19,500 square miles. Completed in 1907, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/20/2017.
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Location
| State | Idaho |
| County | Twin Falls |
| Nearest City | None |
| River/Stream | Snake River |
| Coordinates | 42.59610, -114.39970 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 380 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 1,500 acre-ft |
| Max Storage | 1,500 acre-ft |
| Normal Storage | 1,500 acre-ft |
| Surface Area | 86 acres |
| Drainage Area | 19,500 sq mi |
| Max Discharge | 12,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Idaho Power Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/20/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00050 |
| Federal ID | ID83070S003 |
| More Info | State Dam Safety Program |