Point of Rocks is an earth dam located in Carbon County, Wyoming, built in 1908. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 8 ft8 ft tall and 210 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 Point of Rocks
The primary purpose of Point of Rocks 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 (private). It impounds the Cottonwood Creek near Alcova.
The dam stands 8 feet tall and stretches 210 feet across, creates a reservoir covering 35 acres, and has a maximum storage capacity of 227 acre-feet. Completed in 1908, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/03/2024.
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Location
| State | Wyoming |
| County | Carbon |
| Nearest City | Alcova |
| River/Stream | Cottonwood Creek |
| Coordinates | 42.22110, -106.39820 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 210 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 227 acre-ft |
| Max Storage | 227 acre-ft |
| Normal Storage | 138 acre-ft |
| Surface Area | 35 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Usdi - BLM |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/03/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00383 |
| Federal ID | WY00383 |
| More Info | State Dam Safety Program |