Hermine
Hermine is an earth dam located in Natrona County, Wyoming, built in 1912. It carries a Low hazard potential classification and has a fair condition assessment.
About Hermine
The primary purpose of Hermine is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Garrett Ranch Company (private). It impounds the Bates Creek near Casper.
The dam stands 12 feet tall, and has a maximum storage capacity of 174 acre-feet. Completed in 1912, 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 08/15/2022.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Natrona |
| Nearest City | Casper |
| River/Stream | Bates Creek |
| Coordinates | 42.60450, -106.44230 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 174 acre-ft |
| Max Storage | 174 acre-ft |
| Normal Storage | 132 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | GARRETT RANCH COMPANY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/15/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00242 |
| Federal ID | WY00242 |
| More Info | State Dam Safety Program |