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8. Minor trenching to allow the installation of necessary underground pipes or cables may be <br />allowed if no alternative, including boring, is feasible, and: <br />a. Impacts to fish and wildlife habitat are avoided to the maximum extent possible; <br />b. The utility installation shall not increase or decrease the natural rate, extent, or <br />opportunity of channel migration; <br />c. Appropriate best management practices are employed to prevent water quality <br />impacts or other environmental degradation; and <br />d. Mitigation is implemented, as appropriate, pursuant to KCC 17B.05.020 Environmental <br />protections and critical areas. <br />9. Dredging for the purpose of obtaining fill material is prohibited, except when permitted <br />under KCC 17B.06.120 Mining; or when needed for a project associated with the Model <br />Toxics Control Act (MTCA) or the Comprehensive Environmental Response, Compensation <br />and Liability Act (CERCLA) habitat restoration, or any other significant restoration effort <br />approved by a shoreline conditional use permit, where placement of fill is waterward of the <br />OHWM. <br />10. Dredging and excavation shall be confined to the minimum area necessary to accomplish <br />the intended purpose or use. <br />11. Hydraulic dredging or other techniques that minimize the dispersal and broadcast of <br />bottom materials shall be preferred over agitation forms of dredging. <br />12. Curtains and other appropriate mechanisms shall be used to minimize widespread <br />dispersal of sediments and other dredge materials. <br />13. Entries across shore and wetland edges to accomplish dredging or excavation shall be <br />confined to the minimum area necessary to gain entry and shall be confined to locations <br />with the least potential for site disturbance and damage. <br />14. Dredging and excavation shall be scheduled at times having the least impact to fish <br />spawning, nesting patterns, and other identified natural processes. <br />15. Dredge spoils are also considered fill, and shall not be deposited within the shoreline <br />except where such deposit is in accordance with approved procedures intended to <br />preserve or enhance wildlife habitat, natural drainage, or other naturally occurring <br />conditions. <br />16. Disposal of dredge material within a river’s channel migration zone shall require a <br />conditional use permit. <br />17. Dredge material disposal on land away from the shoreline is permitted under the following <br />conditions: <br />a. Shoreline ecological functions and processes will be preserved, including protection of <br />surface and groundwater; <br />b. Erosion, sedimentation, floodwaters or runoff will not increase adverse impacts to <br />shoreline ecological functions and processes or property; and <br />c. Sites will be adequately screened from view of local residents or passersby on public <br />right-of-waysrights-of-way. <br />(Ord. 2016-006, 2016) <br /> <br />17B.06.080 Filling, grading, and excavation. <br />A. Policies. Pursuant to RCW 36.70A.480, the filling, grading, and excavation policies of the 2016 <br />2021 Kittitas County Shoreline Master Program shall be considered as policies of the Kittitas <br />County Comprehensive Plan.