Webster
Webster is a dam located in Madison County, Idaho, built in 1976. It carries a Low hazard potential classification and has a fair condition assessment.
About Webster
The primary purpose of Webster is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is private-owned. It impounds the Lyons Creek Snake River.
The dam stands 22 feet tall and stretches 220 feet across, creates a reservoir covering 6 acres, has a storage capacity of 55 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1976, the structure is 50 years 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 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 04/10/2018.
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Location
| State | Idaho |
| County | Madison |
| River/Stream | Lyons Creek Snake River |
| Coordinates | 43.70690, -111.66550 |
Physical Characteristics
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 220 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 55 acre-ft |
| Normal Storage | 55 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 127 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/10/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00352 |
| Federal ID | ID00352 |
| More Info | State Dam Safety Program |