SECTION 20110 BALLAST AND WALKWAY AGGREGATE
2011-9-30 · B. Ballast/walkway aggregate shall be crushed stone broken by the crusher and have at least 2 broken surfaces: angular, rough-surfaced, clean and free of sand, loam, clay, flat, elongated, soft or disintegrated pieces, and other deleterious substances. 1. The Ballast/walkway aggregate shall conform to the property