30.63B.170 Standards for reclamation of quarry or mining sites.
Upon completion or abandonment of a quarry or mining operation, the owner or operator of sites not regulated by the Washington State Department of Natural Resources pursuant to chapter 78.44 RCW shall obtain a land disturbing activity permit for reclamation, which shall include an approved full stormwater site plan pursuant to chapter 30.63A SCC and comply with the following reclamation standards:
(1) Grading or backfilling shall be done with clean earth material (i.e., non-noxious, non-flammable, non-combustible and non-putrescible solids);
(2) Graded or backfilled areas, except for roads, shall be sodded or surfaced with soil of a quality at least equal to the topsoil of the immediately surrounding land areas, and to a depth equal to that of the topsoil of immediately surrounding land areas, provided that all sod and soil shall be at least eight inches in depth consistent with soil quality and depth BMPs in volume V of the Drainage Manual;
(3) Final grading shall result in finished grades which would allow development of the land uses permitted within the underlying zone classification;
(4) Bare topsoil shall be stabilized by planted trees, shrubs, legumes, and grasses native to the region and compatible with the surrounding area;
(5) Graded or backfilled areas shall be reclaimed in a manner that will not allow water to collect, nor permit stagnant water to remain, and will not adversely affect the groundwater aquifer or maximum seasonal high groundwater table; and
(6) Non-harmful tailings, which consist of earth material and soil piles, shall be graded to near-level contour, matching the surrounding natural topography. The leveled and graded area shall be sodded or surfaced and planted as required by subsections (2) and (4) of this section. (Added by Amended Ord. 10-023, June 9, 2010, Eff date Sept. 30, 2010; Amended by Amended Ord. 17-070, Nov. 1, 2017, Eff date Dec. 1, 2017).