N & S
N & S is an earth dam located in Big Horn County, Wyoming, built in 1946. It carries a Low hazard potential classification and has a fair condition assessment.
About N & S
The primary purpose of N & S is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Usdi - Blm (federal). It impounds the Five Springs Creek near Bighorn.
The dam stands 20 feet tall and stretches 1,490 feet across, creates a reservoir covering 7 acres, and has a maximum storage capacity of 98 acre-feet. Completed in 1946, the structure is well-established, with more than 75 years of service.
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 06/23/2022.
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Location
| State | Wyoming |
| County | Big Horn |
| Nearest City | Bighorn |
| River/Stream | Five Springs Creek |
| Coordinates | 44.79770, -107.98960 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 1,490 ft |
| Year Completed | 1946 (80 years old) |
Storage & Hydraulics
| NID Storage | 98 acre-ft |
| Max Storage | 98 acre-ft |
| Normal Storage | 55 acre-ft |
| Surface Area | 7 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | USDI - BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/23/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01147 |
| Federal ID | WY01147 |
| More Info | State Dam Safety Program |