Jones #1 is an earth dam located in Custer County, Montana, built in 1949. It carries a Low hazard potential classification.
Dam profile
NID height · 22 ft22 ft tall and 430 ft long. 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 Jones #1
The primary purpose of Jones #1 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 Larson Land and Livestock (private). It impounds the Tr-ash Creek near Terry.
The dam stands 22 feet tall and stretches 430 feet across, creates a reservoir covering 5 acres, and has a maximum storage capacity of 57 acre-feet. Completed in 1949, 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. The most recent inspection on record was 04/17/2007. That was over 19 years ago.
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Location
| State | Montana |
| County | Custer |
| Nearest City | Terry |
| River/Stream | Tr-ash Creek |
| Coordinates | 46.40660, -105.53390 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 430 ft |
| Year Completed | 1949 (77 years old) |
Storage & Hydraulics
| NID Storage | 57 acre-ft |
| Max Storage | 57 acre-ft |
| Normal Storage | 34 acre-ft |
| Surface Area | 5 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Larson Land and Livestock |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 04/17/2007 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01641 |
| Federal ID | MT01641 |
| More Info | State Dam Safety Program |