Southside 1 ½" Round Rock is harvested from a deposit created by the combined ancestral flow of the San Benito River and the Tres Pinos Creek. It is processed through a Coarse Material Washer (scrubber) in order to remove clay and silt. The material is then conveyed to a final wash screen where undersize aggregates are removed. The final product is stockpiled, air dried, and ready for shipment.

Application: Southside 1 ½" Round Rock has a wide variety of uses. It is well suited for septic leach fields, backfill for retaining walls, and drainage blankets. In special Portland cement concrete mixes it can be used as a coarse aggregate ingredient. Southside 1 ½" drain rock is also utilized in landscaping applications as a decorative aggregate and as an ingredient of the Graniterock Stream Spawning Cobble blend. The aggregate color is typically light tan/gray, with spots of red, pink and purple.

	Inches		MM/UM		Southside Grading		ASTM C-33, Area Ballast Specification, ASTMD-448
	2"		50 mm		100		100
	1 ½"		37.5 mm		95		90–100
	1"		25 mm		40		20–55
	¾"		19 mm		11		0–15
	3⁄8"		9.5 mm		3.7		0–5

	Loose Weight Per Cubic Foot		90.10 lbs
	Rodded Weight Per Cubic Foot		100.4 lbs
	Bulk Specific Gravity		2.66
	Absorption		1.0
	Weight Per Cubic Yard		2,711 lbs
	Cubic Yards Per Ton		1.35 cubic yards

For additional information, please contact Don Barrett at 831.768.2309 or dbarrett@graniterock.com.