Almost similtainiously with the closing of the Alpine Tunnel in 1910, severe washouts in the Trout Creek canyon caused the closure of the Como-Buena Vista section of the C&S. This left the Buena Vista-Hancock segment an isolated segment. An engine was stationed at Buena Vista to sevice this section on a tri-weekly basis. Then, of course, cars were interchanged with the D&RG at the 3-rail at Buena Vista. By 1915, operations were terminated at Romley and the tuntable from the old C&S roundhouse at Gunnison was installed at this location. This entire operation lasted until October, 1924 and the rails taken up 2 years later.
Another short lived D&RG interchange with another narrow gauge railway company was at Espanola NM. An agreement with the AT&SF made this as far south as allowed when constructing the Santa Fe (chili) branch. Local Santa Fe interests financed and built the Texas, Santa Fe, & Northern Railroad Company with the intentions of extending the line into Utah, Colorado, Texas, and even the Repuplic of Mexico. As with most grandious schemes, the only managed to build the 30 or so miles between Espanola and Santa Fe. The railroad later became known as the Santa Fe Southern. Under many legal & financial shenanigans, the line came under control of the D&RG and was finally wholly absorbed into the system in 1908.