The Frisco’s Kansas City Subdivision wandered in and out the flood plains of the Marais Des Cygnes River and of the Little Osage River. This route required numerous bridges over these two rivers as well as crossings of abandoned meanders, sloughs, and tributaries. The Frisco bridged many these drainages with ballast-deck pile trestles, most of which were driven in the late 20’s through the mid 30’s. During the early 70’s, the Frisco, an innovator in many ways, opted to embark on a program, which would replace these aging structures with precast concrete beam and steel structures. Two bridge gangs and two bridge cranes worked the program, which renewed nearly 20 bridges. The process of renewing the bridges without building a shoo-fly or without closing the mainline for extended periods can be seen in the following images. The first bridge is at C-58.6, which was being rebuilt into a 14 span, pre-stressed concrete beam structure. Once the concrete piers and the abutment have been poured, the work to remove the ballast deck commenced. The CWR was cut and punched to allow its removal and and re-installation as the work progress. Once the gang had the dispatcher's authority the rail was unbolted and pulled back. Once the rail had been removed, the piles were cut, the the deck was chained, and the bridge crane lifted it, and dumped it into the ravine. The last image in this row shows the opened panel and the new concrete pier. The images also show that the deck was rebuilt in stages, and one can see the new bridge spans mixed with the old ballast deck. After the span was open, the bridge crane walked a prestressed concrete beam forward and set it into place. Once both beams were in place, new bridge ties were put into place, the rails temporarily re-spiked directly to the ties, and the still unfinished bridge was ready for traffic to flow. Bridge C49.3 was also being renewed. This bridge had 8, 27' steel-beam spans. Like bridge C-58.6, once the deck was removed, the steel beams were walked into place and set into place This image shows bridge C72.5, which has been completed. Several timber bents still need to be removed. Dad usually rode his territory every Friday, when he would make a KC-Ft Scott turn. Here is a shot from the rear of a northbound freight as it crosses one of the recently rebuilt bridges. This is the same inspection trip ; the train has just crossed the Maris Des Cygnes River...C66.7 I believe that this is the north end of Henson. Both bridge cranes are in the clear for the weekend.