Horgan Reservoir
Horgan Reservoir is an earth dam located in Valley County, Montana, built in 1952. It carries a Low hazard potential classification.
About Horgan Reservoir
The primary purpose of Horgan Reservoir 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 Otto Zerre (private). It impounds the Tr-oswego Creek near Oswego.
The dam stands 20 feet tall and stretches 200 feet across, and has a maximum storage capacity of 258 acre-feet. Completed in 1952, 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 | Valley |
| Nearest City | Oswego |
| River/Stream | Tr-oswego Creek |
| Coordinates | 48.21170, -106.00220 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 200 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 258 acre-ft |
| Max Storage | 258 acre-ft |
| Normal Storage | 132 acre-ft |
| Max Discharge | 36 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | OTTO ZERRE |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02014 |
| Federal ID | MT02014 |
| More Info | State Dam Safety Program |