Watts #1 is an earth dam located in Custer County, Montana, built in 1912. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 900 ft long, taller than 62% 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 Watts #1
The primary purpose of Watts #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Henry a Watts,_jr (private). It impounds the Tr-muster Creek near Kinsey.
The dam stands 28 feet tall and stretches 900 feet across, has a maximum storage capacity of 251 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1912, the structure is over a century 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 | Kinsey |
| River/Stream | Tr-muster Creek |
| Coordinates | 46.58600, -105.68360 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 900 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 251 acre-ft |
| Max Storage | 251 acre-ft |
| Normal Storage | 117 acre-ft |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,000 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Henry a Watts,_jr |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01606 |
| Federal ID | MT01606 |
| More Info | State Dam Safety Program |