The Des Moines - Quincy train was led by BNSF 515 and 8052. Except for two tank cars near the rear of the train, there were only covered hoppers in the consist. On the scanner at home later in the afternoon, I heard them stall on the way into Knoxville, having overheated a traction motor on 515. They ended up doubling the train into town, using a single-ended siding to put some of the train away temporarily.
The switch broke down in to several sections, each of which was lifted by an endloader and moved to the grade. Then the derrick would raise and position the section. Once in place, the piece would be bolted on the west end and then the derrick would move forward as the next section was fetched by the loader. At times, the endloader was used to help position the section before it went after the next section of the switch.
By 2:30, it was time for the last section, the switch points. This piece turned out to be almost all the loader could handle. I stayed while the points were carefully maneuvered into position and the crew began attaching them to the previous section. With only the transition rails to be done, I took a break and went back to the ranch for a while.
Around 4:30 I heard Foreman Frank on the radio arranging to bring the DMOWQM through the site. The maintenance crew would put all of their equipment on the mainline and line the switches for the siding so the local could come by the work site. I drove into town and arrived just in time to see the train entering the west end of the Hawkeye siding. Work on the transition rail and on the switch throw hardware continued as the local came down the siding. At 5:00 the train came by the new switch, led by BNSF 146 and 8628. When I left to go home again, the track gang had begun drilling to connect the south transition rail.
Postscript: As of Wednesday evening, the mainline is back in service, but the Cascade siding remains disconnected from the switches. I'm guessing that the siding itself was not a BNSF project, but contracted out, and that someone now needs to return to attach the siding to the switches.