Johnson 41-23-4377 is an earth dam located in Johnson County, Wyoming, built in 2005. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 29 ft29 ft tall and 537 ft long, taller than 65% 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 Johnson 41-23-4377
Johnson 41-23-4377 is a dam in Johnson, Wyoming. The dam is owned by Dry Fork Land & Livestock LLC (private). It impounds the Little Bulwacker Creek near Buildings in Sec 14.
The dam stands 29 feet tall and stretches 537 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 164 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 2005, the structure is relatively new.
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 07/02/2025.
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Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Buildings in Sec 14 |
| River/Stream | Little Bulwacker Creek |
| Coordinates | 43.75440, -106.07070 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 20 ft |
| Dam Length | 537 ft |
| Year Completed | 2005 (21 years old) |
Storage & Hydraulics
| NID Storage | 164 acre-ft |
| Max Storage | 164 acre-ft |
| Normal Storage | 89 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 3,033 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Dry Fork Land & Livestock LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/02/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02460 |
| Federal ID | WY02460 |
| More Info | State Dam Safety Program |