Twilight of an Era

Twilight of an Era (HM2B92)

Location: Bonner-West Riverside, MT 59808 Missoula County
Country: United States of America

N 46° 52.497', W 113° 53.123'

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Inscription
The true of the century decade began one of transition and progress and is considered the first decade of materialism and consumerism.

A Tribute to Milltown Dam

The growth of Montana's lumber industry was dependent on the development to electrical energy. For turn-of-the-century entrepreneur W.A. Clark, wealth derived from mining in Butte made possible his expansion into other business enterprises in Montana.
Clark recognized the emergent energy needs of Missoula and the surrounding area. In 1904 he purchased 20 acres of land at the confluence of the Clark Fork and Blackfoot Rivers as a site for his proposed dam. Clark also acquired sufficient water rights on the two rivers to operate the power plant. Construction of the Milltown Dam began in September 1905 and was completed in 1907. Clark relocated his Western Lumber Company from Lothrop to Milltown in 1911 further establishing the local community as a lumber town, now a focal point for electrical energy production.
The Milltown Dam influenced the culture and landscape of this pocket of Western Montana. The industry made possible by the dam created a solid livelihood and sense of ownership for this once pioneer community, a proud historic journey that encompasses almost one hundred years.

Original features



of the dam
include a 220 foot timber crib, rock-filled spillway about 40 feet tall. Ten inch square timbers set on the river bed and secured to pilings were filled with rock that provided the foundation for the spillway. Essentially a gravity dam: the structure resists the reservoir's force by the shear gravity of the rock-filled cribs. The 126 foot long by 65 foot wide powerhouse is a brick and reinforced concrete structure housing five General Electric alternating current generators and two G.E. direct current exciters all powered by Leffel twin horizontal turbines. The dam's peak generation of 3,400 Kilowatts provided service to local industry and transportation, the towns of Bonner and Milltown, as well as a Missoula and rural circuit.

Dam History at a glance


1854 — Captain John Mullan carves out the Mullan Trail through Milltown
1883 — Northern Pacific Railroad arrives in Milltown
1886 — Hammond-Bonner Mill opens
1903 — McCormick sells the townsite land to the Western Lumber Company (W.A. Clark)
1904 — W.A. Clark purchases the existing power system at Bonner Mill and begins plans to build a dam and generating plant on the Clark Fork River
1905-1907 — Milltown Dam is constructed
1908 — The plant first generates electricity and survives



flood conditions of major proportions
1916 — Clark sells the dam to Missoula Light and Water Company
1924— The dam is sold to the Missoula Public Service Company
1929 — The dam and its utility interest are sold to Montana Power Company
2002 — Northwestern Energy purchases Montana Power Company including the Milltown Dam
The Dam is scheduled for removal.
Details
HM NumberHM2B92
Tags
Marker ConditionNo reports yet
Date Added Sunday, September 9th, 2018 at 11:01am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)12T E 280131 N 5195310
Decimal Degrees46.87495000, -113.88538333
Degrees and Decimal MinutesN 46° 52.497', W 113° 53.123'
Degrees, Minutes and Seconds46° 52' 29.82" N, 113° 53' 7.3799999999999" W
Driving DirectionsGoogle Maps
Area Code(s)406
Which side of the road?Marker is on the right when traveling West
Closest Postal AddressAt or near , Bonner-West Riverside MT 59808, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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