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KITTITAS COUNTY SOLID WASTE ON-CALL <br />CLE ELUM TRANSFER STATION FRONT ENTRANCE DESIGN <br />FILL AND BACKFILL PW\JA\KITTCO02\ENTRANCE <br />31 23 23 - 6 JUNE 2023 <br />©COPYRIGHT 2023 JACOBS <br />G. Settlement: Correct and repair any subsequent damage to structures, <br />pavements, curbs, slabs, piping, and other facilities, caused by settlement of <br />fill or backfill material. <br />3.02 BACKFILL UNDER AND AROUND STRUCTURES <br />A. Under Facilities: Within influence area beneath structures, slabs, pavements, <br />curbs, piping, conduits, duct banks, and other facilities, backfill with base <br />course, unless otherwise shown. Place base course in lifts of 6-inch maximum <br />thickness and compact each lift to minimum of 95 percent relative compaction <br />as determined in accordance with ASTM D698. <br />3.03 FILL <br />A. Outside Influence Areas beneath Structures, Pavements, Curbs, Slabs, Piping, <br />and Other Facilities: <br />1. Unless otherwise shown, place earthfill as follows: <br />a. Allow for 6-inch thickness of topsoil where required. <br />b. Maximum 8-inch thick lifts. <br />c. Place and compact fill across full width of embankment. <br />d. Compact to minimum 90 percent relative compaction in <br />accordance with ASTM D698. <br />e. Dress completed embankment with allowance for topsoil, crest <br />surfacing, and slope protection, where applicable. <br />3.04 REPLACING OVEREXCAVATED AND SUBEXCAVATED MATERIAL <br />A. Replace excavation carried below grade lines shown or established by <br />Engineer as follows: <br />1. Beneath Fill or Backfill: Same material as specified for overlying fill or <br />backfill. <br />2. Permanent Cut Slopes (Where Overlying Area is Not to Receive Fill or <br />Backfill): <br />a. Flat to Moderate Steep Slopes (3H:1V, Horizontal Run; Vertical <br />Run): Earthfill. <br />b. Steep Slopes (Steeper than 3H:1V): <br />1) Correct overexcavated or subexcavated zones by <br />transitioning between overcut areas and designed slope <br />adjoining areas, provided such cutting does not adversely <br />impact existing facilities, adjacent facility areas, or <br />completed Work. <br />2) Backfilling in these areas of steep slopes is restricted unless, <br />in Engineer’s opinion, backfill will remain stable, and