Hi Paul,
I was doing some research a while back on the Milwaukee Road in Tacoma and found this site that has scale drawings of many Milwaukee Road Stations, including the one on the Tacoma Tide Flats.I don't think your station is one of them on the list, but for anyone wanting to build a station, I think the Mil Road used similar plans in lots of locations. Here is the link and a few pictures of the tacoma station.
http://www.train-orders.com/MILW/MILW.html
I also found a site that has the complete set of Milwaukee Road magazines, I found one that had an article on the Tacoma Tide Flat station in the May 1954 edition. Anyone doing research on their local station may find something similar for your station.
http://milwaukeeroadarchives.c...ukeeRoadMagazine.htm