9434 7TH AVE SE 2016-01-01 MF Import

Washington HYDRAULICPROJECTAPPROVAL NorlhPuge�Sound Depanment ol 76018 Mill Creek Boulevertl ... FISH antl RCW 77.55.700 - Appeal pursuant to Chapler 34 OS RCW Mill Creek, WA 9 80124 2 96 WILDLIFE (425)775-13:1 Issue Date: December O8, 2005 Projecl Expiration Date: October 15, 2006 Conlrol Number: FPA/Public Notice #: 103283-t NIA 19. Willow trees shall be planted among the rocks of the outfall energy dissipater and flow spreader at a density of at least 3 feet on center, and maintenance shall be adequate to ensurE normal growth and survival of at least 80% after 3 years. 20. The dissipater shail be large enough so that ihe conveyance o( stormwater will continue to be adequate even when the willows are full size and density. CONDUIT PROVISIONS 21. Conduit alignment shall be as nearly perpendicular to the stream as possible. 22. The conduit shall be installed at su�cient depth so that subsequent disturbance of the streambed is avoided. 23. When using trench excavation, the trenches shall be excavated in the dry or shatl be isolated from the Flowing stream. Disturbance of the streambed shall be limited to the amount necessary to complete the project. 24. The trench shall be backfilled with existing streambed material or clean, rounded, stream "fish mix" gravel. The streambed shall be returned to preproject condition. 25. Excess spoils shall be disposed of so it will not re-enter the slream. 26. The conduit approach trench shall be isoiated from the stream until laying of the conduit across the stream occurs. GENER.AL PROVISIONS 27. All bare earth areas shall te protected from erosion and appropriately revegetated prior to final inspection or completion of the project. 28. Equipment used for this projecc shall be free of external petroleum-based products while working around the stream. Equipment shall be checked daily for leaks and any necessary repairs shall be completed prior to commencing work activities along the stream. 29. Equipment cr�ssings o( the stream are not authorized by this HPA. 30. If at any time, as a resull o( project activities, fish are observed in distress, a fish kill occurs, or water quality problems develop (including equipment leaks or spilis), immediate notification shall be made to the Washington Department of Ecology at 1-800-258-5990, and to the Area Habitat Biologist lisled below. Page 3 of 6