BNSF 9233 is making its way through "the sag" on Main 1 a few miles north of Palmer Lake. Over 100 years ago, tracks of competing railroads (Rio Grande and Santa Fe) crossed here. Specifically, Santa Fe crossed over Rio Grande. You can still clearly see the embankment from the old bridge. In World War 1, the US government took over the railroads and ordered Rio Grande and Santa Fe to connect their respective tracks and run the Joint Line as directional, with southbounds on Main 1 and northbounds on Main 2. A tradition that is largely still the case, although Main 1 now is CTC between Littleton and Palmer Lake. Main 2 still operates using Track Warrants and ABS.
