Pissolio No. 1 is an earth dam located in Weston County, Wyoming, built in 1909. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 45 ft45 ft tall and 280 ft long, taller than 90% 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 Pissolio No. 1
The primary purpose of Pissolio No. 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Robert Perino Trust (private). It impounds the Spring Draw near Edgemont, Sd.
The dam stands 45 feet tall and stretches 280 feet across, creates a reservoir covering 4 acres, and has a maximum storage capacity of 42 acre-feet. Completed in 1909, the structure is over a century 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 05/23/2022.
At 45 feet, this dam is taller than 90% of dams nationwide.
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Location
| State | Wyoming |
| County | Weston |
| Nearest City | Edgemont, Sd |
| River/Stream | Spring Draw |
| Coordinates | 44.07140, -104.25460 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 45 ft |
| Dam Length | 280 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 42 acre-ft |
| Max Storage | 42 acre-ft |
| Normal Storage | 42 acre-ft |
| Surface Area | 4 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Robert Perino Trust |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/23/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02590 |
| Federal ID | WY02590 |
| More Info | State Dam Safety Program |