Watters #1 is an earth dam located in Powder River County, Montana, built in 1966. It carries a Significant hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 215 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 Watters #1
The primary purpose of Watters #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Watters Farm Inc (private). It impounds the Gring Creek near Powderville.
The dam stands 29 feet tall and stretches 215 feet across, has a maximum storage capacity of 129 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1966, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Montana |
| County | Powder River |
| Nearest City | Powderville |
| River/Stream | Gring Creek |
| Coordinates | 45.55380, -105.34110 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 215 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 129 acre-ft |
| Max Storage | 129 acre-ft |
| Normal Storage | 83 acre-ft |
| Drainage Area | 2 sq mi |
| Max Discharge | 500 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Watters Farm Inc |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01814 |
| Federal ID | MT01814 |
| More Info | State Dam Safety Program |