Lone Tree
Lone Tree is an earth dam located in Crook County, Wyoming, built in 1955. It carries a Low hazard potential classification and has a poor condition assessment.
About Lone Tree
The primary purpose of Lone Tree 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 Greenwood Ranches C/o Wilbur Newland (private). It impounds the Lone Tree Creek near See Remarks.
The dam stands 17 feet tall and stretches 989 feet across, creates a reservoir covering 28 acres, and has a maximum storage capacity of 327 acre-feet. Completed in 1955, 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 08/24/2023.
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Location
| State | Wyoming |
| County | Crook |
| Nearest City | See Remarks |
| River/Stream | Lone Tree Creek |
| Coordinates | 44.93639, -104.22028 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 989 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 327 acre-ft |
| Max Storage | 327 acre-ft |
| Normal Storage | 133 acre-ft |
| Surface Area | 28 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | GREENWOOD RANCHES C/O WILBUR NEWLAND |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/24/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01077 |
| Federal ID | WY01077 |
| More Info | State Dam Safety Program |