"Practically all railroad and crane tracks in the yard are in pavements and most of them are on filled ground. They necessarily carry heavy concentrated loads, and as a result of these conditions are expensive to maintain. The general character of construction is shown in figure J-18. Practically the entire track system in the yard was thoroughly overhauled. Transportation equipment consists of cars of the various types, locomotives, and cranes. Special provisions were made for overhauling all of this equipment with relief labor."[1,p.86]

1. Public Works of the Navy, US Government Printing Office, Washington DC, Bulletin 38, May 1937.