French #1

French #1 is an earth dam located in Custer County, Montana, built in 1950. It carries a Low hazard potential classification.

Hazard potentialLowFailure would cause limited damage
ConditionNot assessed
Emergency action planNot reported
Last inspectionNot reported
Height25 ft
Built195076 years ago

Dam profile

NID height · 25 ft
25 FT TWO-STORY HOUSEMEDIAN U.S. DAM · 24 FT

25 ft tall and 127 ft long, taller than 50% of U.S. dams with a recorded height. 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 French #1

The primary purpose of French #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 Astrid French (private). It impounds the Sage Creek near Kinsey.

The dam stands 25 feet tall and stretches 127 feet across, and has a maximum storage capacity of 66 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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Location

StateMontana
CountyCuster
Nearest CityKinsey
River/StreamSage Creek
Coordinates46.44660, -106.05110

Physical Characteristics

Dam TypeEarth
NID Height25 ft
Dam Height25 ft
Dam Length127 ft
Year Completed1950 (76 years old)

Storage & Hydraulics

NID Storage66 acre-ft
Max Storage66 acre-ft
Normal Storage27 acre-ft

Ownership & Safety

PurposeFire Protection, Stock, Or Small Fish Pond
OwnerAstrid French
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentNot assessed
Emergency Action PlanNot Required

Identifiers

NID IDMT01623
Federal IDMT01623
More InfoState Dam Safety Program