Beardsley No. 1 is an earth dam located in Niobrara County, Wyoming, built in 1962. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 27 ft27 ft tall and 300 ft long, taller than 59% 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 Beardsley No. 1
The primary purpose of Beardsley No. 1 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Stanley O. Swanson (private). It impounds the Natural Bridge Draw near Edgemont Sd.
The dam stands 27 feet tall and stretches 300 feet across, creates a reservoir covering 3 acres, and has a maximum storage capacity of 47 acre-feet. Completed in 1962, 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 10/10/2022.
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Location
| State | Wyoming |
| County | Niobrara |
| Nearest City | Edgemont Sd |
| River/Stream | Natural Bridge Draw |
| Coordinates | 43.31050, -104.53790 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 300 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 47 acre-ft |
| Max Storage | 47 acre-ft |
| Normal Storage | 32 acre-ft |
| Surface Area | 3 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Stanley O. Swanson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/10/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01078 |
| Federal ID | WY01078 |
| More Info | State Dam Safety Program |