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N <br />Design Ca taurs- <br />AM <br />;Aru <br />I <br />hngncernel <br />ups°"'"—ArOoMiMcOMp to j <br />i <br />Dry Creeks •.d Wave.wSys [drtkq <br />SO IS O 50OG 150 704-- <br />} <br />..e rtw.z, r«�.s.w.ar .� <br />Z 4 Ia IO 30 40 so WE <br />Figure Al. An example of contours for a restoration derived from an intensive <br />topographical survey using a total station. <br />During contouring and dirt work, onsite topsoil should be salvaged, <br />temporally stockpiled, and then redistributed evenly as a top dressing. <br />Topsoil may not be available in sufficient quantities to cover the site, thus <br />soil may need to be augmented with organic material (weed free mulch), <br />humates, mycorrhizal inoculation, and fertilizer. The importation of <br />topsoil is normally cost prohibitive and chances the introduction of weeds. <br />If contouring roads or areas that are compacted by construction and <br />vehicular use, the soils should be ripped to a minimum depth of 18 inches <br />(24 or more is preferred) before contouring. Ripping enhances water <br />infiltration, aeration, and the general success of the restoration process. <br />Caution should be exercised when working and moving soil during wet <br />conditions. Soils easily become compacted when worked while wet. This <br />is especially true of soils with high clay fractions. Compacted soils may <br />1 prevent germination and exasperate erosion. — — <br />L� 521 Page <br />Iieli I10V� ILLC,10%[I NL,1IN1A011.W)1.R\NC"II <br />�'Y -RI 11 1WdN I NVIRUNN11 N I AL ANI) - UIJA I KS - Vti MV.GM.A I BASIN1.N4 I'1 -.COM <br />