PERMFILE42596 - Laserfiche WebLink

Home Browse Search

• Section 816.152 Continued. (d) Road embankments. Embankment sections shall be constructed in accordance with the following provisions: (1) All vegetative material and topsoil shall be removed from the em- bankment foundation during construction to increase stability, and no vegetative material or topsoil shall be placed beneath or in any Class I Road embankment. (2) Where an embankment is to be placed on side slopes exceeding 1v:5h (20 percent), the existing ground shall be plowed, stepped, or, if in bedrock, keyed in a manner which increases the stability of the fill. The keyway shall be a minimum of 10 feet in width and shall extend a minimum of 2 feet below the toe of the fill. (3) Material containing by volume less than 25 percent of rock larger than 6 inches in greatest dimension shall be spread in successive uni- form layers not exceeding 12 inches in thickness before compaction. (4) Where the material for an embankment consists of large-size rock, broken atone, or fragmented material that makes placing it in 12-inch layers impossible under paragraph (d)(3) of this Section, the embankment shall be constructed in uniform layers not exceeding in thickness the approximate average size of the rock used, but the layers shall not exceed 36 inches in thickness. Rock shall not be dumped in final posi- tion, but shall be distributed by blading or dozing in a manner that will ensure proper placement in the embankment, so that voids, pockets and bridging will be reduced to a minimum. The final layer of the embankment shall meet the requirements of paragraph (d)(3) of this Section. (5) Each layer of embankment shall be completed, leveled, and compacted before the succeeding layer is placed. Loads of material shall be leveled as placed and kept smooth. The successive layers shall be compacted evenly by routing the hauling and leveling equipment over the 816-183