Long Horn #1 Dam

Long Horn #1 Dam is a gravity dam located in Valley County, Montana. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.

About Long Horn #1 Dam

Long Horn #1 Dam is a dam in Valley, Montana. The dam is owned by Doi Blm (federal). It impounds the Intermittent.

The dam stands 26 feet tall and stretches 681 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 99 acre-feet, and collects water from a drainage area of 0 square miles.

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. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 09/01/2017.

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Low HazardUnsatisfactory ConditionEmergency Action Plan: Not Required

Location

StateMontana
CountyValley
River/StreamIntermittent
Coordinates47.98679, -107.21047

Physical Characteristics

Dam TypeGravity
NID Height26 ft
Dam Length681 ft

Storage & Hydraulics

NID Storage99 acre-ft
Max Storage99 acre-ft
Normal Storage34 acre-ft
Surface Area14 acres
Drainage Area0 sq mi
Spillway TypeUncontrolled

Ownership & Safety

OwnerDOI BLM
Owner TypeFederal
Hazard ClassificationLow
Condition AssessmentUnsatisfactory
Last Inspection09/01/2017
Emergency Action PlanNot Required

Identifiers

NID IDMT03019
Federal IDMT03019
More InfoState Dam Safety Program

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