A link to the old site for now: https://sites.google.com/site/hcrhbackuppremigration/resources/maps/Map-Links
Multnomah County 1889
Atlas: Multnomah County 1889
State: Oregon
http://www.historicmapworks.com/Map/US/1638453/Multnomah+County+1889/Multnomah+County+1889/Oregon/
USGS. 1948. CRH - Portland to Dodson (approx)
Detail: WA_Vancouver_244439_1948_250000_geo.pdf
USGS. 1950. CRH - Portland to Dodson (approx)
Detail: WA_Vancouver_244441_1950_250000_geo.pdf
USGS. 1979. CRH - Fairview to Warrendale
Detail: WA_Vancouver_244454_1979_100000_geo.pdf
Tentative Plan, State Highway System, 1916
Second Biennial Report of the Oregon State Highway Commission Covering the Period December 1st, 1914 to November 30th, 1916
http://digital.lib.pdx.edu/oscdl/files/odot/pdx005t0001.pdf
AUTOMOBILE ROAD MAP, SHOWING THE MAIN TRAVELED ROADS OF OREGON WITH MILEAGES
Prepared by the Oregon State Highway Department
Third Biennial Report of the Oregon State Highway Commission Covering the Period December 1st, 1916 to November 30th, 1918
http://www.gutenberg.org/files/35344/35344-h/35344-h.htm#MapI
Oregon Highway Commission's Proposed Highways (1918)
Third Biennial Report of the Oregon State Highway Commission Covering the Period December 1st, 1916 to November 30th, 1918
http://www.gutenberg.org/files/35344/35344-h/images/illo069large.jpg
Oregon State Highway Commission - 4th Biennial Report of the Oregon State Highway Commission Covering the Period December 1st, 1918 to November 30th, 1920
http://digital.lib.pdx.edu/oscdl/files/odot/pdx005t0003.pdf
1920 Automobile Road Map
Oregon State Highway Commission - 4th Biennial Report of the Oregon State Highway Commission Covering the Period December 1st, 1918 to November 30th, 1920
http://digital.lib.pdx.edu/oscdl/files/odot/pdx005t0003.pdf
Part of Mt. Hood Quadrangle, Showing Columbia River Highway, Mt. Hood and Source of Portland's Water Supply
Photographic Reproduction of Plaster Cast.
Samuel C. Lancaster. The Columbia: America's Great Highway. Atglen, PA: Schiffer Publishing, Ltd. 1915. Reprinted 2004.