Hyades is an earth dam located in Toole County, Montana, built in 1956. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 40 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 Hyades
The primary purpose of Hyades is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Green Coulee Ranch (private). It impounds the Diffused Surface Water near Galata.
The dam stands 12 feet tall and stretches 40 feet across, and has a maximum storage capacity of 158 acre-feet. Completed in 1956, the structure is well into its service life at over 50 years 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 | Toole |
| Nearest City | Galata |
| River/Stream | Diffused Surface Water |
| Coordinates | 48.86830, -111.51720 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 40 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 158 acre-ft |
| Max Storage | 158 acre-ft |
| Normal Storage | 20 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Green Coulee Ranch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03626 |
| Federal ID | MT03626 |
| More Info | State Dam Safety Program |