Bonneau Dike

Bonneau Dike is an earth dam located in Chouteau County, Montana, built in 2005. It carries a Undetermined hazard potential classification and has a satisfactory condition assessment.

About Bonneau Dike

The primary purpose of Bonneau Dike is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Bia (federal). It impounds the Box Elder Creek near Havre.

The dam stands 15 feet tall and stretches 893 feet across, creates a reservoir covering 136 acres, has a maximum storage capacity of 2,571 acre-feet, and collects water from a drainage area of 49 square miles. Completed in 2005, the structure is relatively new.

Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 07/16/2019.

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Undetermined HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateMontana
CountyChouteau
Nearest CityHavre
River/StreamBox Elder Creek
Coordinates48.30060, -109.86190

Physical Characteristics

Dam TypeEarth
NID Height15 ft
Dam Height15 ft
Dam Length893 ft
Year Completed2005 (21 years old)

Storage & Hydraulics

NID Storage2,571 acre-ft
Max Storage2,571 acre-ft
Surface Area136 acres
Drainage Area49 sq mi
Spillway TypeNone

Ownership & Safety

PurposeIrrigation
OwnerBIA
Owner TypeFederal
Hazard ClassificationUndetermined
Condition AssessmentSatisfactory
Last Inspection07/16/2019
Emergency Action PlanYes

Identifiers

NID IDMT01054
Federal IDMT01054S001
More InfoState Dam Safety Program

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