(A) All soil subgrade shall be prepared in accordance with ODOT Spec. 203.13. Soils with a maximum dry weight of less than 100 pounds per cubic foot are considered unsuitable for use where subgrade compaction for a depth of 12 inches is required, and when encountered in the upper 12 inches of the subgrade shall be replaced with suitable soil or granular material.
(B) Subgrade under new pavement and paved shoulders shall be compacted to a depth of 12 inches below the surface of the subgrade and to a width of 18 inches beyond the edge of the surface of the pavement, paved median, paved shoulder, or to the back of the adjacent curb and gutters.
(C) Subgrade under pavement widening, driveways, mailbox turnouts, and stabilized shoulders, shall be compacted to a depth of six inches below the surface of the subgrade and to the width of the pavement or base, or to the back of adjacent curb and gutter.
(Ord. 20-89, passed 6-28-89)