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GENERAL DESCRIPTION <br />• <br />• <br />r~ <br />L <br />This section describes the methodology and calculations used to design the <br />drainage and sediment control structures beyond those which have been <br />previously constructed (as of January 1991): and which are discussed <br />previously in this exhibit. The proposed structures are as follows: <br />- Sedimentation Ponds - H, I, J. K, L <br />- Diversion Ditches - B-3, C-2, E-1, G-2. Revised F1, <br />I1, I2, I3A, I36, I4, I5A, I5B, I6 <br />J1 <br />L1, L2, L3A, L36 <br />Haul road Diversion Ditches 1, 2, 3, 4 & 5 <br />Clean Water Diversion <br />Permanent Diversion No. 1 (PD-1) <br />Permanent Diversion No. 2 (PD-2) <br />Permanent Diversion No. 3 (PD-3) <br />Permanent Diversion No. 4 (PD-4) <br />Permanent Diversion No. 5 (PD-5) <br />- Culverts - 10, 11, 12, lA, 3A, 9A, 9B, PC-3 <br />- Drop Structure 1 <br />H1A, H16, H1C, H1D <br />All hydrology and sedimentology calculations were performed using the SEDCAD+ <br />computer model developed by Civil Software Design. <br />The SEDCAD+ computer printouts for Ponds H through K are contained at the end <br />of this section, SEDCAD+ Computer Printouts, and show all hydrology and <br />sedimentology inputs and calculated results on a subwatershed basis for the <br />10-year, 24-hour event. Printouts for the 25-year, 24-hour event are not <br />contained, as all inputs, except the precipitation amount, are identical. <br />Typical SEDCAD+ printouts are also contained for ditches and culverts showing <br />hydrology inputs and results. These typical printouts are meant to be <br />examples and are actual printouts for the Pond H ditches and Culvert 10 only. <br />H:18571V OL.51D6S.PLN <br />07/26/95 9:19em WP51/cmc <br />4°pROVED APR 2 5 1995 <br />23-52 Revised - 01/30/95 <br />'t f~, i3 <br />