I retired from the MNA RR in SW Missouri which has several tunnels, all wet. All on grade and all wet with water flowing one end to the other. The wettest being the tunnel called Cricket under Omaha, Arkansas. When there is rain the water literally shoots out of the sandstone walls and washes the train (and crew!). Deflector shields actually are used to deflect some of the water downwards. The other major problem tunnel is Reed Springs (RR siding name or Reed's Spring, town name) where the apex is 1/2 mile west of the west end. Poor drainage from a nearby highway sends waterfalls down the entrance cliffs and through the tunnel for most of the rainy season. And yes, the water gives the section fits in rainy season but traffic is not shut down until the rail is under water. I also should say there are 4" thick slabs of sandstone that spauld out of the ceilings occasionally and are laying on the track. JP
Edited 1 time(s). Last edit at 04/18/2017 01:17PM by jim pallow.