Lazy Y No. 1
Lazy Y No. 1 is an earth dam located in Converse County, Wyoming, built in 1957. It carries a Low hazard potential classification and has a poor condition assessment.
About Lazy Y No. 1
The primary purpose of Lazy Y No. 1 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Powder River Coal Company (private). It impounds the Lazy Y Draw near Edgemont.
The dam stands 45 feet tall and stretches 1,069 feet across, creates a reservoir covering 70 acres, and has a maximum storage capacity of 1,251 acre-feet. Completed in 1957, 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 06/13/2022.
At 45 feet, this dam is taller than 91% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Converse |
| Nearest City | Edgemont |
| River/Stream | Lazy Y Draw |
| Coordinates | 43.42940, -105.34900 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 45 ft |
| Dam Length | 1,069 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 1,251 acre-ft |
| Max Storage | 1,251 acre-ft |
| Normal Storage | 849 acre-ft |
| Surface Area | 70 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | POWDER RIVER COAL COMPANY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/13/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00604 |
| Federal ID | WY00604 |
| More Info | State Dam Safety Program |