Pfaft #1

Pfaft #1 is an earth dam located in Prairie County, Montana, built in 1942. It carries a Low hazard potential classification.

Hazard potentialLowFailure would cause limited damage
ConditionNot assessed
Emergency action planNot reported
Last inspectionNot reported
Height14 ft
Built194284 years ago

Dam profile

NID height · 14 ft
14 FT TWO-STORY HOUSEMEDIAN U.S. DAM · 24 FT

14 ft tall and 200 ft long. 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 Pfaft #1

The primary purpose of Pfaft #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 Burlington Northern Rr (private). It impounds the Tr-hay Creek.

The dam stands 14 feet tall and stretches 200 feet across, has a maximum storage capacity of 92 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1942, 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
CountyPrairie
Nearest CityNone
River/StreamTr-hay Creek
Coordinates46.88700, -105.96120

Physical Characteristics

Dam TypeEarth
NID Height14 ft
Dam Height14 ft
Dam Length200 ft
Year Completed1942 (84 years old)

Storage & Hydraulics

NID Storage92 acre-ft
Max Storage92 acre-ft
Normal Storage17 acre-ft
Drainage Area1 sq mi
Max Discharge1,000 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeFire Protection, Stock, Or Small Fish Pond
OwnerBurlington Northern Rr
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentNot assessed
Emergency Action PlanNot Required

Identifiers

NID IDMT02386
Federal IDMT02386
More InfoState Dam Safety Program