Parkman Disposal
Parkman Disposal is an earth dam located in Johnson County, Wyoming, built in 1985. It carries a Low hazard potential classification and has a fair condition assessment.
About Parkman Disposal
The primary purpose of Parkman Disposal is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Llb Ranch, Llc (private). It impounds the Parkman Draw.
The dam stands 60 feet tall and stretches 940 feet across, creates a reservoir covering 10 acres, and has a storage capacity of 203 acre-feet. Completed in 1985, the structure is 41 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 05/18/2021.
At 60 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Wyoming |
| County | Johnson |
| River/Stream | Parkman Draw |
| Coordinates | 43.91330, -106.04580 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 60 ft |
| Dam Height | 60 ft |
| Dam Length | 940 ft |
| Year Completed | 1985 (41 years old) |
Storage & Hydraulics
| NID Storage | 203 acre-ft |
| Normal Storage | 203 acre-ft |
| Surface Area | 10 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Debris Control |
| Owner | LLB RANCH, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/18/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01796 |
| Federal ID | WY01796 |
| More Info | State Dam Safety Program |