Grinnell
Grinnell is an earth dam located in Carbon County, Wyoming, built in 1919. It carries a Low hazard potential classification and has a fair condition assessment.
About Grinnell
The primary purpose of Grinnell is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Q Creek Land & Livestock Company Llc (private). It impounds the Grinnell Creek near Alcova.
The dam stands 8 feet tall and stretches 930 feet across, creates a reservoir covering 41 acres, and has a maximum storage capacity of 310 acre-feet. Completed in 1919, 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 05/28/2020.
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Location
| State | Wyoming |
| County | Carbon |
| Nearest City | Alcova |
| River/Stream | Grinnell Creek |
| Coordinates | 42.22690, -106.42960 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 930 ft |
| Year Completed | 1919 (107 years old) |
Storage & Hydraulics
| NID Storage | 310 acre-ft |
| Max Storage | 310 acre-ft |
| Normal Storage | 196 acre-ft |
| Surface Area | 41 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Q CREEK LAND & LIVESTOCK COMPANY LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/28/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00319 |
| Federal ID | WY00319 |
| More Info | State Dam Safety Program |