Pr-110 Retention Dam

Pr-110 Retention Dam is a gravity dam located in Phillips County, Montana, built in 1936. It carries a Low hazard potential classification.

About Pr-110 Retention Dam

The primary purpose of Pr-110 Retention Dam 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 Doi Blm (federal). It impounds the Cottonwood Ck./milk River near Hinsdale.

The dam stands 21 feet tall and stretches 608 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 114 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1936, 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. The most recent inspection on record was 08/17/2016.

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Low HazardNot Rated ConditionEmergency Action Plan: Not Required

Location

StateMontana
CountyPhillips
Nearest CityHinsdale
River/StreamCottonwood Ck./milk River
Coordinates48.69881, -108.03756

Physical Characteristics

Dam TypeGravity
NID Height21 ft
Dam Length608 ft
Year Completed1936 (90 years old)

Storage & Hydraulics

NID Storage114 acre-ft
Max Storage114 acre-ft
Surface Area16 acres
Drainage Area0 sq mi

Ownership & Safety

PurposeFire Protection, Stock, Or Small Fish Pond
OwnerDOI BLM
Owner TypeFederal
Hazard ClassificationLow
Condition AssessmentNot Rated
Last Inspection08/17/2016
Emergency Action PlanNot Required

Identifiers

NID IDMT00775
Federal IDMT00775
More InfoState Dam Safety Program

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