The latest Model Railroad Planning has a great plan, Alma District. There're bridge numbers like "Bridge 15-B"
My son asked me and I guessed mile posts and a letter in this mile, B for the second one.
What is correct?
Wolfgang
Pueblo & Salt Lake RR
Come to us http://www.westportterminal.de my videos my blog
Depends on the railroad. It could mean it is the 2nd bridge after MP 15, or it is bridge 15 on the 'B' line.
Jim
Modeling BNSF and Milwaukee Road in SW Wisconsin
That is a common practice to number the bridges with the milepost. In a similar vein, typically intermediate signals are also numbered with a number close to the milepost.
Dave H. Painted side goes up. My website : wnbranch.com
SP track charts identified bridges by mileage "marker" and description, including culverts. Tunnels, on the other hand, were numbered. For instance on the Overland Route (Oakland to Ogden), at mile 36.90 there is 36" conc. pipe, and on eastward (no. 2) track is tunnel no. 17 (1417' conc., 189' gunite, 42' timber post - C.R.) between mile 117.29 and 117.61.
Hello Wolfgang,
The Santa Fe usually followed a practice such as Dave Husman describes, numbering bridges by the next lowest milepost. Thus the next bridge east of Burlingame, Kansas, milepost 76.89 on the main line to Topeka, was bridge 76.6. It was about six tenths of a mile west of milepost 76.
However, the author of the Model Railroad Planning article, Jared Harper, knows more about the Alma District than just about anyone. If he says the bridges on that branch were designated with mile numbers and letters, that's good enough for me. The difference may have arisen from the fact that the Alma District was originally built by another company as the Manhattan, Alma & Burlingame Ry., and taken over by the Santa Fe around 1900.
So long,
Andy
Andy Sperandeo MODEL RAILROADER Magazine
Thank you for the information.
Here in Germany you find along the line every 200 meters signs like this at km 162.2
or this at km 158.4
At bridges you can see marks like "km 12,245" which means from point zero of this line 12 km and 245 meters.
i remember riding the mopac between st louis and lincoln neb in the sixties when they had the mileage markers painted on the lineside telegraph poles. i don't recall if they also used mile posts but i was not looking for them so i wouldn't have noticed. as for bridge numbers, look along the interstate highway as you drive along. every structure is numbered for road repair crews to reference them.
grizlump