Purple Water is an earth dam located in Liberty County, Montana, built in 1916. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 210 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 Purple Water
The primary purpose of Purple Water 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 Violet Broadhurst (private). It impounds the Alkali Springs Coulee near Loma.
The dam stands 20 feet tall and stretches 210 feet across, has a maximum storage capacity of 94 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1916, 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 | Liberty |
| Nearest City | Loma |
| River/Stream | Alkali Springs Coulee |
| Coordinates | 48.20730, -111.15280 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 210 ft |
| Year Completed | 1916 (110 years old) |
Storage & Hydraulics
| NID Storage | 94 acre-ft |
| Max Storage | 94 acre-ft |
| Normal Storage | 38 acre-ft |
| Drainage Area | 3 sq mi |
| Max Discharge | 90 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Violet Broadhurst |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03594 |
| Federal ID | MT03594 |
| More Info | State Dam Safety Program |