SECTION 20110 BALLAST AND WALKWAY AGGREGATE
2011-9-30 · A. Ballast/walkway aggregate production and handling facilities shall conform to the AREMA Manual, Chapter 1, Section 2.5, Production and Handling. ... A. Prior to placing ballast on track subgrade, perform a final check of the condition of the track subgrade as to line, grade, cross section, and compaction.