Etna
Etna is an earth dam located in Box Elder County, Utah, built in 1959. It carries a Significant hazard potential classification.
About Etna
The primary purpose of Etna is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by West Fork Grouse Creek Irrigation Co (private). It impounds the West Fork Of Grouse Creek near Etna.
The dam stands 55 feet tall and stretches 1,400 feet across, has a maximum storage capacity of 1,510 acre-feet, and collects water from a drainage area of 31 square miles. Completed in 1959, the structure is well into its service life at over 50 years old.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 06/15/2023.
At 55 feet, this dam is taller than 94% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Utah |
| County | Box Elder |
| Nearest City | Etna |
| River/Stream | West Fork Of Grouse Creek |
| Coordinates | 41.70017, -113.95919 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 55 ft |
| Dam Length | 1,400 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 1,510 acre-ft |
| Max Storage | 1,510 acre-ft |
| Normal Storage | 1,471 acre-ft |
| Drainage Area | 31 sq mi |
| Max Discharge | 19 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | WEST FORK GROUSE CREEK IRRIGATION CO |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 06/15/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | UT00319 |
| Federal ID | UT00319 |
| More Info | State Dam Safety Program |