INITIAL HEAVY EARTH MOVING

Based upon the designs and surveys, the heavy earth moving crew (or "spread") then follows, placing additional fill material upon the road where the sub-grade must be improved, or where cuts or fills must be made to improve vertical alignment. This spread consists of four DW-20's, fourteen yard earthmovers, two bulldozers, one motor-grader. It will move and place a total of 1, 350, 000 cubic yards of earth to complete the road. The material to be hauled must be carefully selected to assure that it will have adequate strength and stability after compaction. A bulldozer is assigned to locate suitable material in "borrow pits" and keeps well ahead of the earthmovers.

Corrugated steel culverts are placed at the location of all water courses, the number and size of culverts being based upon the amount of water which Is expected to flow.

As each layer or "lift" of earth is placed on the road, water is applied and mixed into the material by the grader blades, following which it is shaped and then rolled for firm compaction with heavy, rubber tired rollers.