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Photo, Print, Drawing Conley Street Bridge, Spanning the Clark Fork River at the western end of Conley Avenue, Deer Lodge, Powell County, MT

[ Data Pages from Survey HAER MT-161  ]

More Resources

[ Photo Captions from Survey HAER MT-161  ]

About this Item

Title

  • Conley Street Bridge, Spanning the Clark Fork River at the western end of Conley Avenue, Deer Lodge, Powell County, MT

Names

  • Historic American Engineering Record, creator
  • Montana State Penitentiary
  • Northern Pacific Railway
  • Milwaukee Road Railroad
  • Conley, Frank
  • Montana Department of Transportation, sponsor
  • Axline, Jon, historian
  • Hager, Kristi, photographer
  • McPartland, Mary, transmitter

Created / Published

  • Documentation compiled after 1968

Headings

  • -  vehicular bridges
  • -  concrete girder bridges
  • -  T-beams
  • -  transportation
  • -  concrete abutments
  • -  concrete piers
  • -  deck trusses
  • -  prisoners
  • -  spalling
  • -  Montana--Powell County--Deer Lodge

Latitude / Longitude

  • 46.3906,-112.736843

Notes

  • -  Significance: The Conley Street Bridge is significant for its association with the Montana State Penitentiary and the use of convict labor for public works projects outside the prison's walls, a practice common in the state from 1907 until 1925. State penitentiary convicts built at least four reinforced concrete bridges in southwestern Montana beginning in 1907, culminating in the Conley Street Bridge in 1912. The bridge provided access to the Northern Pacific Railway and Milwaukee Road Railroad yards directly west across the Clark Fork River from the prison. The penitentiary contracted with the railroads for the delivery of its supplies. The bridge is an excellent and intact early example of a reinforced concrete T-beam bridge. The bridge exhibits the standard concrete girders flush with the sidewalls common to T-beam bridges built in Montana before 1913. The design was standard to convict-built bridges in southwestern Montana between 1910 and 1913. All of the bridge's original structural components and appearance are intact. It is the first known continuous span reinforced concrete T-beam bridge built in Montana and the last built by convict labor.
  • -  Survey number: HAER MT-161
  • -  Building/structure dates: 1912 Initial Construction
  • -  Building/structure dates: after 2018 Demolished
  • -  National Register of Historic Places NRIS Number: 11000227

Medium

  • Photo(s): 10
  • Data Page(s): 15
  • Photo Caption Page(s): 1

Call Number/Physical Location

  • HAER MT-161

Source Collection

  • Historic American Engineering Record (Library of Congress)

Repository

Control Number

  • mt0638

Rights Advisory

Online Format

  • image
  • pdf

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  • Rights Advisory: No known restrictions on images made by the U.S. Government; images copied from other sources may be restricted. https://www.loc.gov/rr/print/res/114_habs.html
  • Reproduction Number: ---
  • Call Number: HAER MT-161
  • Access Advisory: ---

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Cite This Item

Citations are generated automatically from bibliographic data as a convenience, and may not be complete or accurate.

Chicago citation style:

Historic American Engineering Record, Creator, Montana State Penitentiary, Northern Pacific Railway, Milwaukee Road Railroad, Frank Conley, Sponsor Montana Department Of Transportation, and Jon Axline, Hager, Kristi, photographer. Conley Street Bridge, Spanning the Clark Fork River at the western end of Conley Avenue, Deer Lodge, Powell County, MT. Montana Powell County Deer Lodge, 1968. translateds by Mcpartland, Marymitter Documentation Compiled After. Photograph. https://www.loc.gov/item/mt0638/.

APA citation style:

Historic American Engineering Record, C., Montana State Penitentiary, Northern Pacific Railway, Milwaukee Road Railroad, Conley, F., Montana Department Of Transportation, S. & Axline, J., Hager, K., photographer. (1968) Conley Street Bridge, Spanning the Clark Fork River at the western end of Conley Avenue, Deer Lodge, Powell County, MT. Montana Powell County Deer Lodge, 1968. McPartland, M., trans Documentation Compiled After. [Photograph] Retrieved from the Library of Congress, https://www.loc.gov/item/mt0638/.

MLA citation style:

Historic American Engineering Record, Creator, et al., photographer by Hager, Kristi. Conley Street Bridge, Spanning the Clark Fork River at the western end of Conley Avenue, Deer Lodge, Powell County, MT. trans by Mcpartland, Marymitter Documentation Compiled After. Photograph. Retrieved from the Library of Congress, <www.loc.gov/item/mt0638/>.