66 Pastures is an earth dam located in Goshen County, Wyoming, built in 1910. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 16 ft16 ft tall and 6,500 ft long. 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 66 Pastures
The primary purpose of 66 Pastures is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Amber Alpha II, LLC (private). It impounds the Horse Creek Offstream near Morrill, Neb.
The dam stands 16 feet tall and stretches 6,500 feet across, creates a reservoir covering 82 acres, and has a maximum storage capacity of 1,141 acre-feet. Completed in 1910, 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 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 04/19/2022.
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Location
| State | Wyoming |
| County | Goshen |
| Nearest City | Morrill, Neb |
| River/Stream | Horse Creek Offstream |
| Coordinates | 41.66600, -104.12780 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 6,500 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 1,141 acre-ft |
| Max Storage | 1,141 acre-ft |
| Normal Storage | 335 acre-ft |
| Surface Area | 82 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Amber Alpha II, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/19/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00141 |
| Federal ID | WY00141 |
| More Info | State Dam Safety Program |