Flathead County Stormwater Retention Pond

Flathead County Stormwater Retention Pond is an earth dam located in Flathead County, Montana, built in 1999. It carries a Significant hazard potential classification.

About Flathead County Stormwater Retention Pond

The primary purpose of Flathead County Stormwater Retention Pond is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Flathead County Solid Waste Dept. (local government). It impounds the Tr-stillwater River near Kalispell.

The dam has a maximum storage capacity of 69 acre-feet. Completed in 1999, the structure is 27 years 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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Significant Hazard ConditionEmergency Action Plan: Not Required

Location

StateMontana
CountyFlathead
Nearest CityKalispell
River/StreamTr-stillwater River
Coordinates48.30703, -114.34251

Physical Characteristics

Dam TypeEarth
Year Completed1999 (27 years old)

Storage & Hydraulics

NID Storage69 acre-ft
Max Storage69 acre-ft
Spillway TypeUncontrolled

Ownership & Safety

PurposeFlood Risk Reduction
OwnerFLATHEAD COUNTY SOLID WASTE DEPT.
Owner TypeLocal Government
Hazard ClassificationSignificant
Emergency Action PlanNot Required

Identifiers

NID IDMT03844
Federal IDMT03844
More InfoState Dam Safety Program

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