Ed (gmpullman), thanks for the railsandtrails.com link. While the track chart info. is written in a language I don’t know (“rr engineeranese”), I think I can figure out much of what is relevant for modeling.
Twenty yrs. ago rail-trail sites didn’t have such nice RR info. so it didn’t occur to me to check back with them.
I knew that sounded familiar. http://www.railsandtrails.com/NMRA/Research/index.html
I went to that clinic.
They are not very detailed. They show the lines, junctions and yard locations but not actual track arangements. Also I have found some mistakes.
For instance on the California map (just south of Marysville) they show a connection running east from the Western Pacific (an unnamed location) to Dantoni Junction on the Southern Pacific. Dantoni Jct is south of the Yuba River which is not shown. This connection does not exist and never has. A short branch (not shown) used to run from Dantoni Jct to Dantoni which is east of Dantoni Jct.
On the north side of the river there was a spur running east from the WP to a sand plant (dredging the Yuba River). I believe they mistook this spur for a connection between the railroads. The east end of the spur was about 100ft short of the SP and at least 30 feet below the SP track.
Ok, cool!