Crazy Mountain Ranch
Crazy Mountain Ranch is an earth dam located in Park County, Montana, built in 1968. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Crazy Mountain Ranch
The primary purpose of Crazy Mountain Ranch is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Ch Cmr Partners Llc (private). It impounds the Hammond Creek near Clyde Park.
The dam stands 36 feet tall and stretches 700 feet across, and has a maximum storage capacity of 270 acre-feet. Completed in 1968, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 05/30/2023.
At 36 feet, this dam is taller than 83% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Montana dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Montana |
| County | Park |
| Nearest City | Clyde Park |
| River/Stream | Hammond Creek |
| Coordinates | 45.91715, -110.44350 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 700 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 270 acre-ft |
| Max Storage | 270 acre-ft |
| Normal Storage | 270 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | CH CMR PARTNERS LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/30/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MT03724 |
| Federal ID | MT03724 |
| More Info | State Dam Safety Program |