The Spencer, IA, to Mason City, IA, local rolls over the detector east of Cylinder, MP 184. This is the B40's crew heading back to Mason City with 23 cars out of AGP at Emmetsburg, IA, and a loaded ethanol train out of Hartley, IA. This B40 crew went to work at 17:30 at Emmetsburg for the 75 miles trip to Mason City.