Fly Swatter #1 is an earth dam located in Carter County, Montana, built in 1920. It carries a Significant hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 300 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 Fly Swatter #1
The primary purpose of Fly Swatter #1 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 John O. Teigen,_jr. (private). It impounds the Tr-little Missouri River near Capitol.
The dam stands 15 feet tall and stretches 300 feet across, creates a reservoir covering 0 acres, and has a maximum storage capacity of 230 acre-feet. Completed in 1920, the structure is over a century old.
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.
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Location
| State | Montana |
| County | Carter |
| Nearest City | Capitol |
| River/Stream | Tr-little Missouri River |
| Coordinates | 45.39130, -104.09060 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 300 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 230 acre-ft |
| Max Storage | 230 acre-ft |
| Normal Storage | 91 acre-ft |
| Surface Area | 0 acres |
| Max Discharge | 3,000 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | John O. Teigen,_jr. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03054 |
| Federal ID | MT03054 |
| More Info | State Dam Safety Program |