How to Lay a Crushed Line Driveway | Home Guides | SF GateThe grayish-white color of crushed line allows it to enhance any . layer with a metal roller pulled behind the heavy equipment to pack the stones in place.crushed line ocrushed line pack,What Is the Purpose of Crushed Line? | eHowBackfilling with crushed line reinforces the wall and provides a barrier that retains soil while still allowing moisture to escape. To backfill, pack crushed.
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