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<br />e <br /> <br />~ <br /> <br />.. <br /> <br />:EM 1110-2-1913 <br />31 Mar 78 <br /> <br />to the levee but could also be important for any slope whose top is <br />near the right-of-way limits. Borrow area slopes must also be flat <br />enough to allow mowing, if required. Also, where lands ide pits are to <br />be placed back into cultivation, changes in grade must be gentle enough <br />to allow farm equipment to operate safely. The slopes of the upstream <br />and downstream ends of riverside pits should be flat enough to avoid <br />erosion when subjected to flow at high water stages. <br /> <br />b. Depths. Depths to which borrow areas are excavated will depend <br />upon factors such as (1) groundwater elevation, (2) changes at depth to <br />undesirable material, (3) preservation of adequate thickness of river- <br />side blanket, and (4) environmental considerations. <br /> <br />c. Foreshore. The foreshore is that area between the riverside <br />edge of the borrow area and the riverbank as shown in figure 4-1. If a <br /> <br /> BORROW <br /> ARl:A <br />e (L7 <br />RIVER TRAVl:RSE <br /> w <br /> w <br /> -' <br /> VARIl:5 VARIES <br /> BORROW <br /> AREA <br /> <br />. <br /> <br />. <br /> <br />e <br /> <br /> <br /> <br />Figure 4-1. Plan of typical levee and borrow areas <br />with traverse and foreshore <br /> <br />foreshore is specified (i.e., the borrow excavation is not be cut into <br />the riverbank), it should have a substantial width, say 200 ft or more, <br />to help prevent migration of the river channel into the borrow area. <br /> <br />4-3 <br />