Griffin is an earth dam located in Custer County, Montana, built in 1972. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 250 ft long, taller than 65% of U.S. dams with a recorded height. 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 Griffin
The primary purpose of Griffin is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Griffin Ranch C (private). It impounds the Freddie Creek near Terry.
The dam stands 29 feet tall and stretches 250 feet across, has a maximum storage capacity of 103 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1972, the structure is well into its service life at over 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.
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Location
| State | Montana |
| County | Custer |
| Nearest City | Terry |
| River/Stream | Freddie Creek |
| Coordinates | 46.51380, -105.33940 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 250 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 103 acre-ft |
| Max Storage | 103 acre-ft |
| Normal Storage | 66 acre-ft |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,000 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Griffin Ranch C |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01428 |
| Federal ID | MT01428 |
| More Info | State Dam Safety Program |