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Fig. 1 : Suggested steps in creating ditch corridor <br /> (note: all slope gradients are shown as true) <br /> -------------------------------------------------------------------------------------------------------, <br /> Step 1 - identification of boundaries <br /> ID highway/pit edge ' <br /> \ ID point about 75'to 100'south of ditch corridor <br /> highway cut Existing surface <br /> ID ditch location` <br /> Future final surface <br /> ------------------------------------------------------------------------------------------------------ <br /> --------------------------- - - -------------------------------------------------------------- <br /> Step 2 - Excavate corridor <br /> j ID highway/pit edge I <br /> hi g Y h Existing surface <br /> - - - - - - - <br /> Future final surface <br /> ------------------------------------------------------------------------------------------------- <br /> ------------------------------------------------------------------------------------------------------ <br /> Step 3 - Topsoil and seed slope as corridor is created <br /> ID highway/pit edge <br /> highway cut Existing surface <br /> topsoil and ` - - _ <br /> vegetation Future final surface <br /> ------------------------------------------------------------------------------------------------------' <br /> - - - ---------------------------------------------------------------------- <br /> Step 4 - Install ditch when corridor <br /> ID highway/pit edge <br /> completely excavated <br /> ditch <br /> 1 highway cut Existing surface <br /> topsoil and - - . . _ - _ _ <br /> vegetation Future final surface - <br /> ----------------------------------------------------------------------------------------- <br /> ------------------------------------------------------------------------------------------------------ <br /> Step 5 - Continue with mining remaining sand <br /> ID highway/pit edge <br /> ditch <br /> highway cut Existing surface <br /> Remaining sand removed <br /> topsoil and <br /> vegetation Final surface <br />