Basin Creek Dam #2

Basin Creek Dam #2 is an earth dam located in Silver Bow County, Montana, built in 1907. It carries a Significant hazard potential classification and has a poor condition assessment.

About Basin Creek Dam #2

The primary purpose of Basin Creek Dam #2 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Butte-silver Bow (local government). It impounds the Basin Creek near Butte.

The dam stands 49 feet tall and stretches 320 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 290 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1907, 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 07/01/2019.

At 49 feet, this dam is taller than 92% of dams nationwide.

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Significant HazardPoor ConditionEmergency Action Plan: Yes

Location

StateMontana
CountySilver Bow
Nearest CityButte
River/StreamBasin Creek
Coordinates45.83930, -112.52610

Physical Characteristics

Dam TypeEarth
NID Height49 ft
Dam Height49 ft
Dam Length320 ft
Year Completed1907 (119 years old)

Storage & Hydraulics

NID Storage290 acre-ft
Max Storage290 acre-ft
Normal Storage196 acre-ft
Surface Area14 acres
Drainage Area4 sq mi
Max Discharge370 cfs

Ownership & Safety

PurposeWater Supply
OwnerBUTTE-SILVER BOW
Owner TypeLocal Government
Hazard ClassificationSignificant
Condition AssessmentPoor
Last Inspection07/01/2019
Emergency Action PlanYes

Identifiers

NID IDMT00868
Federal IDMT00868
More InfoState Dam Safety Program

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