B M P for Construction of Sand-based, Natural Grass ...
Base materials can include pit-run gravel with a maximum of 2 to 3 percent total silt and clay. Typical specifications for pit-run gravel are listed in Table 1 (page 3). Other materials may include pea gravel or coarse sand, with particles ranging from No. 8 to No. 3/8 screen. Never put fine sand or soil over coarse gravel or allow any similar ...