Lone Tree is an earth dam located in Albany County, Wyoming, built in 1947. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 35 ft35 ft tall and 408 ft long, taller than 80% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Lone Tree
The primary purpose of Lone Tree is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Monaghan Farms, Inc. (robert Deline) (private). It impounds the Lone Tree Creek near Laramie.
The dam stands 35 feet tall and stretches 408 feet across, creates a reservoir covering 48 acres, and has a maximum storage capacity of 728 acre-feet. Completed in 1947, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 07/19/2021.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Wyoming |
| County | Albany |
| Nearest City | Laramie |
| River/Stream | Lone Tree Creek |
| Coordinates | 41.08890, -105.68070 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 408 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 728 acre-ft |
| Max Storage | 728 acre-ft |
| Normal Storage | 447 acre-ft |
| Surface Area | 48 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Monaghan Farms, Inc. (robert Deline) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 07/19/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00154 |
| Federal ID | WY00154 |
| More Info | State Dam Safety Program |