Map of interurban and other railroad lines in the northern Willamette Valley region, dated 1910. The map shows existing electric interurban lines -- mostly radiating out from Portland -- run by Oregon Electric, United Railroad and Oregon Water Power. Proposed electric interurban lines are indicated as well, with the names: United Railroad, Mount Hood Railroad, and Oregon Electric. Several non-electric railroad lines are shown on the map: Oregon Railroad & Navigation Company, Spokane Portland & Seattle, Salem & Falls City Railroad, Southern Pacific, and Northern Pacific.