Grace Dike
Grace Dike is an earth dam located in Caribou County, Idaho. It carries a Significant hazard potential classification and has a fair condition assessment.
About Grace Dike
The primary purpose of Grace Dike is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Pacificorp (private). It impounds the Bear River near Grace.
The dam stands 10 feet tall and stretches 125 feet across, creates a reservoir covering 45 acres, has a maximum storage capacity of 1,100 acre-feet, and collects water from a drainage area of 4,070 square miles.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 06/28/2022.
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Location
| State | Idaho |
| County | Caribou |
| Nearest City | Grace |
| River/Stream | Bear River |
| Coordinates | 42.58790, -111.72910 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 125 ft |
Storage & Hydraulics
| NID Storage | 1,100 acre-ft |
| Max Storage | 1,100 acre-ft |
| Normal Storage | 900 acre-ft |
| Surface Area | 45 acres |
| Drainage Area | 4,070 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | PacifiCorp |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 06/28/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ID00059 |
| Federal ID | ID00059S001 |
| More Info | State Dam Safety Program |