Rafferty #3 is an earth dam located in Custer County, Montana, built in 1939. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 435 ft long, taller than 50% 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 Rafferty #3
The primary purpose of Rafferty #3 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 June F Rafferty (private). It impounds the Tr-spring Creek near Mizpah.
The dam stands 25 feet tall and stretches 435 feet across, and has a maximum storage capacity of 101 acre-feet. Completed in 1939, the structure is well-established, with more than 75 years of service.
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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Montana |
| County | Custer |
| Nearest City | Mizpah |
| River/Stream | Tr-spring Creek |
| Coordinates | 45.88390, -105.33560 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 435 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 101 acre-ft |
| Max Storage | 101 acre-ft |
| Normal Storage | 52 acre-ft |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | June F Rafferty |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01704 |
| Federal ID | MT01704 |
| More Info | State Dam Safety Program |