Silver Lake
Silver Lake is a dam located in Fremont County, Idaho, built in 1915. It carries a Significant hazard potential classification and has a fair condition assessment.
About Silver Lake
The primary purpose of Silver Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is state-owned. It impounds the Thurmon Creek Henrys Fork near Us Hwy 20.
The dam stands 13 feet tall and stretches 940 feet across, creates a reservoir covering 204 acres, has a storage capacity of 700 acre-feet, and collects water from a drainage area of 28 square miles. Completed in 1915, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 08/14/2018.
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Location
| State | Idaho |
| County | Fremont |
| Nearest City | Us Hwy 20 |
| River/Stream | Thurmon Creek Henrys Fork |
| Coordinates | 44.32720, -111.46560 |
Physical Characteristics
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 940 ft |
| Year Completed | 1915 (111 years old) |
Storage & Hydraulics
| NID Storage | 700 acre-ft |
| Normal Storage | 700 acre-ft |
| Surface Area | 204 acres |
| Drainage Area | 28 sq mi |
| Max Discharge | 130 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/14/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00403 |
| Federal ID | ID00403 |
| More Info | State Dam Safety Program |