Donlin Detention Dam
Donlin Detention Dam is an earth dam located in Natrona County, Wyoming, built in 1955. It carries a Low hazard potential classification and has a fair condition assessment.
About Donlin Detention Dam
The primary purpose of Donlin Detention Dam 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 Usdi Blm (federal). It impounds the Alkali Creek near Lysite.
The dam stands 34 feet tall and stretches 470 feet across, creates a reservoir covering 23 acres, and has a storage capacity of 233 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 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 07/26/2023.
At 34 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Wyoming |
| County | Natrona |
| Nearest City | Lysite |
| River/Stream | Alkali Creek |
| Coordinates | 43.21194, -107.30667 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 470 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 233 acre-ft |
| Normal Storage | 233 acre-ft |
| Surface Area | 23 acres |
| Max Discharge | 415 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | USDI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/26/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01435 |
| Federal ID | WY01435 |
| More Info | State Dam Safety Program |