Pine Cone No. 1
Pine Cone No. 1 is an earth dam located in Carbon County, Wyoming, built in 1976. It carries a Low hazard potential classification and has a poor condition assessment.
About Pine Cone No. 1
The primary purpose of Pine Cone No. 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Les & Shelly Dunmire (private). It impounds the Pine Creek near Rock River.
The dam stands 30 feet tall and stretches 900 feet across, creates a reservoir covering 31 acres, and has a maximum storage capacity of 585 acre-feet. Completed in 1976, the structure is 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 08/22/2023.
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Location
| State | Wyoming |
| County | Carbon |
| Nearest City | Rock River |
| River/Stream | Pine Creek |
| Coordinates | 41.66667, -106.15833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 900 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 585 acre-ft |
| Max Storage | 585 acre-ft |
| Normal Storage | 430 acre-ft |
| Surface Area | 31 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LES & SHELLY DUNMIRE |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/22/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00417 |
| Federal ID | WY00417 |
| More Info | State Dam Safety Program |