Mcmaster No. 4
Mcmaster No. 4 is an earth dam located in Niobrara County, Wyoming, built in 1966. It carries a Low hazard potential classification and has a fair condition assessment.
About Mcmaster No. 4
The primary purpose of Mcmaster No. 4 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Van Tassel Ranch Corp. - Norma Bruegger (private). It impounds the Niobrara River near Agate, Neb.
The dam stands 14 feet tall and stretches 470 feet across, creates a reservoir covering 23 acres, and has a maximum storage capacity of 248 acre-feet. Completed in 1966, 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 07/30/2020.
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Location
| State | Wyoming |
| County | Niobrara |
| Nearest City | Agate, Neb |
| River/Stream | Niobrara River |
| Coordinates | 42.67440, -104.15130 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 470 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 248 acre-ft |
| Max Storage | 248 acre-ft |
| Normal Storage | 103 acre-ft |
| Surface Area | 23 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | VAN TASSEL RANCH CORP. - NORMA BRUEGGER |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/30/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00196 |
| Federal ID | WY00196 |
| More Info | State Dam Safety Program |