Interstate Power Company Building

The Interstate Power Company Building, also known as the Masonic Hall and the Dubuque Electric Company, is a historic building located in Dubuque, Iowa, United States. While a single facility, this is actually two buildings: an 1894 three-story Queen Anne, and a 1956 three-story (later four-story) Modern Movement free-standing addition.[2] The Dubuque Electric Company moved into the older building in 1924, and the following year it was reorganized as Interstate Power Company. This became the headquarters of a regional electrical utility that, at one time, served parts of eight states and a Canadian province. The Great Depression and antitrust court rulings altered the company's fortunes. The 1956 addition was designed to hold the companies large computers in an air-conditioned environment, in addition to office space. Other additions to the building were made in 1962, 1981 and 1989. The facility remained Interstate's corporate headquarters until Alliant Energy bought and absorbed the company in 1996.[2] Alliant continued to use the building for a period of time afterward. It was included as a contributing property in the Upper Main Street Historic District in 2005,[3] and it was individually listed on the National Register of Historic Places in 2008.[1]

Interstate Power Company Building
Location1000 Main and 131 W. 10th St., Dubuque, Iowa
Coordinates42°30′09.7″N 90°40′04.3″W
Arealess than one acre
Built1894, 1956
ArchitectThomas Carkeek
Durrant - Bergquist
Architectural styleQueen Anne
Modern Movement
Part ofUpper Main Street Historic District (ID86002102)
MPSDubuque, Iowa MPS
NRHP reference No.08000328[1]
Added to NRHPJune 26, 2008

References
  1. "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
  2. James E. Jacobsen. "Interstate Power Company Building". National Park Service. Retrieved 2017-01-09. with photos
  3. James E. Jacobsen. "Upper Main Street Historic District". National Park Service. Retrieved 2017-01-04. with photos


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