Rip Rap is a generalized term used for larger material used for river runs and erosion control. Most material colors are available in Rip Rap sizes ranging from 2" to 4" all the way up to 8" to 16". ... Rip Rap also refers the larger sizes of Natural River Rock. Sq. Ft. of coverage. Sized Rock (20% – 30% fines) 80. 1 1/2″ – 3 ...
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