#4 Stone (Crushed Granite Ballast) walkway used as the main fill

used as the main fill in dry creek beds

Pro courts use oyster flour or specialty surfaces

600 lbs per cubic yard

Tickets and material certifications available on request

Storm drain systems and dry-well construction

#4 Stone (Crushed Granite Ballast) walkway used as the main fill#4 Stone (Crushed Granite Ballast) Large Clean Stone for Heavy Drainage & Deep Backfill #4 Stone is the bigger cousin spec stone 1" top size, clean of fines, angular crushed granite. The size drainage engineers reach for when #57 isn't big enough: deep foundation backfill, large culvert bedding, rail grade ballast, and the transition layer between rip rap and finer drainage stone. Meets AASHTO M43 No. 4 ASTM D448 No. 4. If the spec says "4 stone,"