OCR Text |
Show ATTENTION TO SIDE DITCHES Provision Should Be Made to Remove All Surface Water Rapidly Guard Against Erosion. Special attention should be paid to providing side ditches which will remove re-move all surface water rapidly. Side ditches on long, steep grades should be protected against serious erosion hy riprap, transverse timbers or nther beams. Culverts and bridges should be of ample size and be built as permanent per-manent structures. Drain tile should be laid to carry off underground water. wa-ter. Side ditches which are kept clean and have suilioient slope to lead the water away are usually preferable to Hie drainage, but the latter Is necessary neces-sary In some places. |