Shiner Lower
Shiner Lower is a dam located in Lemhi County, Idaho, built in 1973. It carries a Low hazard potential classification and has a poor condition assessment.
About Shiner Lower
The primary purpose of Shiner Lower 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 Yearian Creek Lemhi River near Yearian.
The dam stands 18 feet tall and stretches 1,170 feet across, creates a reservoir covering 9 acres, has a storage capacity of 50 acre-feet, and collects water from a drainage area of 20 square miles. Completed in 1973, the structure is well into its service life at over 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 11/05/2020.
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Location
| State | Idaho |
| County | Lemhi |
| Nearest City | Yearian |
| River/Stream | Yearian Creek Lemhi River |
| Coordinates | 44.83950, -113.56860 |
Physical Characteristics
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 1,170 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 50 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 20 sq mi |
| Max Discharge | 123 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 11/05/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00335 |
| Federal ID | ID00335 |
| More Info | State Dam Safety Program |