Mcmahon #2
Mcmahon #2 is an earth dam located in Grand County, Colorado, built in 1913. It carries a Significant hazard potential classification and has a fair condition assessment.
About Mcmahon #2
The primary purpose of Mcmahon #2 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Mcmahon Reservoir Co. (pinto Valley Ranch) (private). It impounds the Red Dirt Creek near Kremmling.
The dam stands 48 feet tall and stretches 987 feet across, creates a reservoir covering 196 acres, has a maximum storage capacity of 4,570 acre-feet, and collects water from a drainage area of 14 square miles. Completed in 1913, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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. An emergency action plan is in place for this dam. The most recent inspection on record was 06/14/2022.
At 48 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Colorado |
| County | Grand |
| Nearest City | Kremmling |
| River/Stream | Red Dirt Creek |
| Coordinates | 40.17833, -106.57223 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 48 ft |
| Dam Height | 48 ft |
| Dam Length | 987 ft |
| Year Completed | 1913 (113 years old) |
Storage & Hydraulics
| NID Storage | 4,570 acre-ft |
| Max Storage | 4,570 acre-ft |
| Normal Storage | 3,460 acre-ft |
| Surface Area | 196 acres |
| Drainage Area | 14 sq mi |
| Max Discharge | 1,817 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | MCMAHON RESERVOIR CO. (PINTO VALLEY RANCH) |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 06/14/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00703 |
| Federal ID | CO00703 |
| More Info | State Dam Safety Program |