Grasmere Middle Dam
Grasmere Middle Dam is a dam located in Owyhee County, Idaho, built in 1936. It carries a Low hazard potential classification and has a poor condition assessment.
About Grasmere Middle Dam
Grasmere Middle Dam is a dam in Owyhee, Idaho. The dam is private-owned. It impounds the Rattlesnake Creek Marys Creek near Remote.
The dam stands 16 feet tall and stretches 700 feet across, creates a reservoir covering 152 acres, has a storage capacity of 420 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1936, the structure is well-established, with more than 75 years of service.
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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. 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 | 42.35550, -115.90480 |
Physical Characteristics
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 700 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 420 acre-ft |
| Normal Storage | 420 acre-ft |
| Surface Area | 152 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 18 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/27/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | ID00411 |
| Federal ID | ID00411 |
| More Info | State Dam Safety Program |