C&O maintained a set of charts showing all side tracks and yard tracks on the system, station-by-station, which consisted of a small schematic diagram and a table with the track number, length in feet, if C&O or private ownership, the type of track it was by use, and remarks. The record seems to have originated in 1937 and apparently was updated periodically as needed. We do not know how these charts were used, but there is no evidence that these sheets were ever published and made available outside the Chief Engineer's Office, and seem to have been an in-office reference tool only.
The sheets were arranged by state. We have rearranged them by subdivision and publish them in that format as more appropriate for reference use today by historians, hobbyists, and modelers.