Thayer No. 1
Thayer No. 1 is an earth dam located in Park County, Wyoming, built in 1935. It carries a Low hazard potential classification and has a fair condition assessment.
About Thayer No. 1
The primary purpose of Thayer No. 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Hoodoo Land Holdings, Llc (private). It impounds the Greybull River, Off Carter Mtn near Meeteetse.
The dam stands 13 feet tall and stretches 120 feet across, creates a reservoir covering 17 acres, and has a maximum storage capacity of 69 acre-feet. Completed in 1935, 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 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 08/15/2024.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Park |
| Nearest City | Meeteetse |
| River/Stream | Greybull River, Off Carter Mtn |
| Coordinates | 44.13444, -109.31500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 120 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 69 acre-ft |
| Max Storage | 69 acre-ft |
| Normal Storage | 69 acre-ft |
| Surface Area | 17 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | HOODOO LAND HOLDINGS, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/15/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01909 |
| Federal ID | WY01909 |
| More Info | State Dam Safety Program |