Marsh Lake is an earth dam located in Madison County, Montana, built in 1956. It carries a Low hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall and 314 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 Marsh Lake
The primary purpose of Marsh Lake is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Larry G Young (private). It impounds the Cataract Creek near Pony.
The dam stands 8 feet tall and stretches 314 feet across, and has a maximum storage capacity of 68 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 | Madison |
| Nearest City | Pony |
| River/Stream | Cataract Creek |
| Coordinates | 45.62737, -111.99251 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 314 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 68 acre-ft |
| Max Storage | 68 acre-ft |
| Normal Storage | 17 acre-ft |
| Max Discharge | 54 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Larry G Young |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01272 |
| Federal ID | MT01272 |
| More Info | State Dam Safety Program |