Knox Meadow is a dam located in Valley County, Idaho, built in 1941. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 19 ft19 ft tall and 600 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Knox Meadow
The primary purpose of Knox Meadow 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 Unnamed Stream Lake Fork near Lake Fork.
The dam stands 19 feet tall and stretches 600 feet across, creates a reservoir covering 156 acres, has a storage capacity of 1,073 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1941, the structure is well-established, with more than 75 years of service.
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 05/10/2017.
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Location
| State | Idaho |
| County | Valley |
| Nearest City | Lake Fork |
| River/Stream | Unnamed Stream Lake Fork |
| Coordinates | 44.89910, -116.03240 |
Physical Characteristics
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 600 ft |
| Year Completed | 1941 (85 years old) |
Storage & Hydraulics
| NID Storage | 1,073 acre-ft |
| Normal Storage | 1,073 acre-ft |
| Surface Area | 156 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 63 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/10/2017 |
| Emergency Action Plan | No |
Identifiers
| NID ID | ID00116 |
| Federal ID | ID00116 |
| More Info | State Dam Safety Program |