804— Riprap and Slope Protection

800-11 Section 804 — Riprap and Slope Protection

804.1 Description 1 Construct a protective layer of broken stone, polyvinyl chloride (PVC) coated wire enclosed rock gabions, or concrete slope protection. 804.2 Materials 804.2.1 Stone for Riprap 1 Provide hard quarry stone or fieldstone that does not disintegrate on exposure to water or weathering. Ensure that the stone has a sodium sulfate content less than or equal to 15% as tested according to AASHTO T 104 . Use stone that is suitable for the purpose intended and obtained from a source on Qualified Product s List 2 . 2 Provide riprap conforming to the gradation classes in the following table. Riprap Class Rock Size (Feet) Rock Size(1) (lb) Percent of Riprap Smaller Than A 0.75 37 100 0.50 11 50 0.20 0.7 15 B 1.33 200 100 1.0 75 85 0.75 37 50 0.42 5 10 C 1.80 500 100 1.30 200 50 0.40 5 10 D 2.25 1000 100 1.80 500 50 0.95 75 10 E 2.85 2000 100 2.25 1000 50 1.80 500 5 F 3.60 4000 100 2.85 2000 50 2.25 1000 5