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Search results with tag "9 riprap"
United States Army Corps of Engineers Engineering Manual ...
www.engr.colostate.edu• Guidelines applicable for: – Open channels not immediately ... 9 Riprap Characteristics • Stone shape – Predominately angular ... angular rock unit weight = 167 pcf 1.7 < D 85/D 15 > 2.7 Bed slope from 2 – 20 % uniform flow with NO tailwater 0.555 2/3 30 1/3 1.95*Sq D g = 48