Soap Creek

Soap Creek is an earth dam located in Lewis and Clark County, Montana, built in 1950. It carries a Low hazard potential classification.

About Soap Creek

The primary purpose of Soap Creek is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Soap Creek Cattle (private). It impounds the Tr-flat Creek near Cascade.

The dam stands 25 feet tall and stretches 500 feet across, and has a maximum storage capacity of 222 acre-feet. Completed in 1950, the structure is well-established, with more than 75 years of service.

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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Low Hazard ConditionEmergency Action Plan: Not Required

Location

StateMontana
CountyLewis and Clark
Nearest CityCascade
River/StreamTr-flat Creek
Coordinates47.34920, -112.33980

Physical Characteristics

Dam TypeEarth
NID Height25 ft
Dam Height25 ft
Dam Length500 ft
Year Completed1950 (76 years old)

Storage & Hydraulics

NID Storage222 acre-ft
Max Storage222 acre-ft
Normal Storage132 acre-ft

Ownership & Safety

PurposeIrrigation
OwnerSOAP CREEK CATTLE
Owner TypePrivate
Hazard ClassificationLow
Emergency Action PlanNot Required

Identifiers

NID IDMT00870
Federal IDMT00870
More InfoState Dam Safety Program

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