Whitefish Sewage Lagoon is an earth dam located in Flathead County, Montana, built in 1962. It carries a Low hazard potential classification.
Dam profile
NID height · 9 ft9 ft tall and 3,200 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 Whitefish Sewage Lagoon
Whitefish Sewage Lagoon is a dam in Flathead, Montana. The dam is owned by City of Whitefish (local government). It impounds the Whitefish River near Kalispell.
The dam stands 9 feet tall and stretches 3,200 feet across, and has a maximum storage capacity of 106 acre-feet. Completed in 1962, 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 | Flathead |
| Nearest City | Kalispell |
| River/Stream | Whitefish River |
| Coordinates | 48.39178, -114.32563 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 3,200 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 106 acre-ft |
| Max Storage | 106 acre-ft |
| Normal Storage | 90 acre-ft |
Ownership & Safety
| Purpose | Other |
| Owner | City of Whitefish |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01423 |
| Federal ID | MT01423 |
| More Info | State Dam Safety Program |