Drga Dam is an earth dam located in Chouteau County, Montana, built in 1938. It carries a Significant hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 400 ft long, taller than 68% 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 Drga Dam
The primary purpose of Drga Dam 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 Jim Drga (private). It impounds the Sage Coulee near Iliad.
The dam stands 30 feet tall and stretches 400 feet across, creates a reservoir covering 12 acres, and has a maximum storage capacity of 148 acre-feet. Completed in 1938, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 06/09/1995. That was over 31 years ago.
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Location
| State | Montana |
| County | Chouteau |
| Nearest City | Iliad |
| River/Stream | Sage Coulee |
| Coordinates | 47.83760, -109.80050 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 400 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 148 acre-ft |
| Max Storage | 148 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 12 acres |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Jim Drga |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 06/09/1995 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03365 |
| Federal ID | MT03365 |
| More Info | State Dam Safety Program |