Swope No. 2 is an earth dam located in Niobrara County, Wyoming, built in 1953. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 26 ft26 ft tall and 369 ft long, taller than 55% 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 Swope No. 2
The primary purpose of Swope No. 2 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Tollman Ranch (private). It impounds the Shirral Draw near Edgemont, Sd.
The dam stands 26 feet tall and stretches 369 feet across, creates a reservoir covering 8 acres, and has a maximum storage capacity of 114 acre-feet. Completed in 1953, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 04/22/2024.
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Location
| State | Wyoming |
| County | Niobrara |
| Nearest City | Edgemont, Sd |
| River/Stream | Shirral Draw |
| Coordinates | 42.93056, -104.07833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 369 ft |
| Year Completed | 1953 (73 years old) |
Storage & Hydraulics
| NID Storage | 114 acre-ft |
| Max Storage | 114 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 8 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Tollman Ranch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 04/22/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00745 |
| Federal ID | WY00745 |
| More Info | State Dam Safety Program |