Photo: Kolin Smith
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Drive a stake at each end of the trench. Measuring from the driveway's surface, mark the desired height of the blocks above the asphalt on both stakes. Tie a mason's line to one stake at the marked line, pull it taut, and secure it at the mark on the other stake. For long or unevenly pitched driveways, place additional stakes at the midpoint and as needed along the trench's length, and tie the line to each one at the proper height. Repeat all steps for the other side of the driveway.



























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