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Rock Riff le Design Drawing Preparation <br /> Landuser._ . Will Good Date: 4/29/2022 <br /> Stream: i Indefinerl nnn to_ditch abve By: Rob Meats <br /> _ Ip16 Macon County, Illinois <br /> Location: <br /> Sec.: - Twp.-___4_ Range-____3 <br /> W 6 E <br /> Wren the tollowing bankfulifflata trom the I&Eform: en the guidelines below should owe or. <br /> No net increase in flood stage or backwater. <br /> Q= 355 cfs Maximum riffle height= 0.0 ft <br /> V= 7.06 ft/sec Structural integrity: <br /> width= 10.0 ft Minimum riprap size= 24 inches <br /> Benchmark EL: 105.10 ft REFERENCE TABLE <br /> Description: 4- Selected rock <br /> approx.Station . topo red rock Class (Djoo) D50 gradation: <br /> at end of saw cut. 4 1.3 ft 7.4 in 4 <br /> 5 1.7 ft 9.8 in <br /> Key Depth: 5 ft 6 2.0 ft 12.1 in NOTE.Gradation 5 <br /> Riffle Slope: 10 1 7 1 2.5 ft I 14.6 in lis the same as former <br /> RR-5. <br /> For definitions of dimensions, refer to IL-ENG-165A and IL-ENG-1658 <br /> Riffle No. STA Control EL Estimated Rock(Tons) <br /> (ft) h, hZ h3 h4 W, Calculated USE <br /> 1 2+78 112.0 3.0 3.5 6.0 1.3 10.0 106 116 <br /> 2 4+73 109.5 3.3 3.8 6.0 1.3 10.0 121 132 <br /> 3 5+90 106.0 2.1 2.6 6.0 1 1.3 7.0 58 65 <br /> 4 7+95 104.6 2.6 31 6.0 1.3 7.0 73 81 <br /> 5 10+00 102.0 2.0 2.5 6.0 1.3 7.0 56 62 <br /> Total Stone: 456 Tars <br /> Notes: <br /> 456 tons @$60/ton in place=$27,360 <br />