Home > Montana > Great Falls vicinity > Morony Hydroelectric Facility, Morony-to-Rainbow 100 kV Transmission Line, West bank of the Missouri River, Great Falls, Cascade County, MT
Item Title
Morony Hydroelectric Facility, Morony-to-Rainbow 100 kV Transmission Line, West bank of the Missouri River, Great Falls, Cascade County, MT
LocationWest bank of the Missouri River,
Great Falls vicinity, MT
Find maps of Great Falls, MT
Created/Published
Documentation compiled after 1968.
Notes
Survey number HAER MT-135-A
Building/structure dates:
1929 initial construction
Significance: The transmission line played an integral role in the growth of Montana's electrical and mining industries in the first half of the twentieth century. Its construction enabled the transmission of hydroelectricity generated at the Morony Hydroelectric Facility into The Montana Power Company's vast power network. Montana Power's electrical supply, in turn, fueled the unprecedented growth of Montana's zinc industry and aided the company to maintain its prominent status as the state's largest electric utility. The Morony-to-Rainbow Line additionally is a well-preserved example of high-voltage transmission technologies of the early twentieth century.
Subjects
Power IndustryMiningElectric Utilities
Collection
Historic American Engineering Record (Library of Congress)
Contents
Photograph caption(s):
First structure on Morony-to-Rainbow 100kV Transmission Line below Morony Dam and Power House. Three-pole H-frame structure with historic porcelain suspension insulators, jumper supports insulators, overhead ground wires, and pole stubs. View to east-northeast
Detail of insulator array at first line structure showing historic porcelain suspension insulators in strings of eight, porcelain jumper support insulators in strings of six, arch rings and ball weights
Morony-to-Rainbow H-frame structure just east of Ryan Dam Road about two and one-fourths miles southwest of Morony Dam and Powerhouse. View to east-northeast
Detail of Morony-to-Rainbow H-frame structure just east of Ryan Dam Road showing three historic porcelain suspension insulators in strings of six. View to east
Overview of Morony-to-Rainbow Line (background) in context with Ryan-to-Rainbow 100kV Transmission Lines 1 and 2 (center and foreground) about three miles southwest of Morony Dam and Powerhouse. View to north
Overview of Morony-to-Rainbow Line (far left) in context with Ryan-to-Rainbow Lines 1 and 2 (center) about six miles southwest of Morony Dam and Powerhouse. View to east-northeast
Morony-to-Rainbow H-frame structure about five and one-fourth miles southwest of Morony Dam and Powerhouse. View to northeast
Detail H-frame structure about five and one-fourth miles southwest of Morony Dam and Powerhouse showing one modern non-ceramic insulator and two historic porcelain suspension insulators
Overview of Morony-to-Rainbow Line (far left) in context with Ryan-to-Rainbow Line 1 and 2 (left center) and Cochrane-to-Rainbow Line (near river) about six and one-half miles southwest of Morony Dam and Powerhouse. View to northeast
Overview view of Morony-tp-Rainbow Line (right) about one-fourth mile northeast of Rainbow Dam. Ryan-to-Rainbow Lines 1 and 2 at center, Cochrane-to-Rainbow Line at left and Rainbow Dam in background right of center. View to southwest
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