Leithton to Barrington/Spaulding

Since the merger with the Canadian National, the northwest quadrant connector at Leithton has assumed great importance in the flow of CN trains to and from the north, using the EJ&E to avoid the congestion of Chicago.

From the flat crossing, with northwest and southwest quadrant connectors, with the Canadian National (former Wisonsin Central, original Soo Line) at Leithton (MP 60.3), start of a 4,350 ft. north-side siding, with crossover at MP 59.8, extending to MP 59.3, the line heads just south of due west, single track, Track Warrant Control, unsignaled (dark territory), maximum speed 45 mph, with 20 mph restrictions through turnouts, past Diamond Lake (MP 59.0), turning south-southwest, past Gilmer (MP 57.4), the 4,350 ft. east side siding at Lake Zurich (MP 54.3 to MP 53.5), Lake Zurich (MP 53.22), where there was once a crossing with the erstwhile Palatine, Lake Zurich & Wauconda Railroad, and the flat crossing, with west and south quadrant connectors, with the C&NW Northwest Line at Barrington (MP 49.6), and just west of due south, past the 9,000 ft. siding, from MP 44.0, past Sutton (MP 43.83), to MP 41.5, to the flat crossing, with southwest and southeast quadrant connectors, with the Milwaukee West line at Tower B17/Spaulding (MP 37.5), where Automatic Block Signals and a 7,000 ft. west-side siding start, with the end of the siding at MP 36.1.