Grasmere South Dike
Grasmere South Dike is a dam located in Owyhee County, Idaho, built in 1909. It carries a Low hazard potential classification and has a fair condition assessment.
About Grasmere South Dike
The primary purpose of Grasmere South Dike 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 Rattlesnake Creek Marys Creek near Remote.
The dam stands 11 feet tall and stretches 1,100 feet across, creates a reservoir covering 213 acres, has a storage capacity of 110 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1909, 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 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 08/27/2020.
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Location
| State | Idaho |
| County | Owyhee |
| Nearest City | Remote |
| River/Stream | Rattlesnake Creek Marys Creek |
| Coordinates | 42.34460, -115.90130 |
Physical Characteristics
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 1,100 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 110 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 213 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/27/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | ID00517 |
| Federal ID | ID00517 |
| More Info | State Dam Safety Program |