Pfister No. 2
Pfister No. 2 is an earth dam located in Niobrara County, Wyoming, built in 1952. It carries a Low hazard potential classification and has a fair condition assessment.
About Pfister No. 2
The primary purpose of Pfister 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 Jack Pfister Ranch (private). It impounds the Oat Creek near Edgemont, Sd.
The dam stands 22 feet tall and stretches 1,076 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 209 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1952, 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 08/13/2020.
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Location
| State | Wyoming |
| County | Niobrara |
| Nearest City | Edgemont, Sd |
| River/Stream | Oat Creek |
| Coordinates | 43.07240, -104.13660 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 1,076 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 209 acre-ft |
| Max Storage | 209 acre-ft |
| Normal Storage | 109 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 4 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | JACK PFISTER RANCH |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/13/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00736 |
| Federal ID | WY00736 |
| More Info | State Dam Safety Program |