For reference, here is an overlay of information from the 1918 ICC map with modern features (©2011 DSP&P Historical Society):
The grade is easy to find and walkable from Soda Lakes Rd west to where it picks up Spring Street. From there, there are houses built on it on the south side of Bear Creek, and a parking lot on the north. Bear Creek has been re-routed a bit in that area, and I couldn't find any traces of the bridge abutments.