3003 W CASINO RD BOEING AIRPORT RD ACCESS 2016-01-01 MF Import

� � that portion of the channel to warrant providing access depending on how the infiltration system is designed. � 10) Control Eroslon in arcas ncar Scaway F31vd � Unauthorized use of off-road vehicles and motorrycles is causing erosion on both side of Seaway Blvd adjacent to the Creek. Boeing proposes to hydroseed the areas to encourage reestablishment of vegetation. 7lie area on Boeing lands will be fenced to � exclude vehicles. Boeing will cooperate with other owners in fencing their properties, but will not bear the costs of fencing ocher ownership. r � 'Ihe outlined actions result in providing access for anadromous Csh into up to about , � 7,9001ineal feet of stream habitat suitable for who salmon and cutthroat trout. The exact ; length of channel available above Seaway Boulevard may vary depending on tlow in the channel (see action 9 above).Approximately 1200 fcet of the 7900 foot reach presently hosts � fish. Considering the 6700 foot :ec�ion tnat presently does not contain fish, the pro�+osed actions provide nearly twice the length of the potential habitat that will be lost due to the proposed action. Further, the width and flows in Powder 1�till Gulch Creek average much � greater than in the impacted channels, therefore even greater mitigation is being provided than indicated by the comparison of stream length. � PERFORI�IANCE STANDARDS In the Wetland Pond, fish must be present. The intent is to have a population of cutthroat trout that is maintained by artiCcial means (stocking). if trout can not survive on � a yeur•round basis,other species will be considcr for the pond after consultation with WDW. For Powder Mill Gulch Creek, the stream must provide hahitat for fishes. A selt- � sustaining run of anadromous �sh is desired, howe��o:, this is too high of a performance standard when mitigating for potentiai habitat that �s not row occupied, and considering the uncertainry of establishing runs that may be subjected to intensive �sheries that are beyond � the control of the project proponent. Therefore, the performance standard is that the stream must be capable of producing coho smolts and cutthroat trout in a substantial portion of iu length. This performance standard allows arti�cial stocking to maintain the � populatior, if required. MONITORINC PROGRA�t 1 The Wetland Pond will be sampled by an appropriate technique to ascercain whether cutthroat trout aze surviving. Annual surveys will be conducted during the early fall for five � years. At the end of this period a decision will be made regarding the suitabiliry of the habitat. The fve year period is intended to allow evaluation over several summers to factor in climatic variability into the decision. If failure is indicated prior to the end of the five tyeaz period contingency actions may be implemented. In Powder Mill Gulch Cr-ek, electrofishing will be conducted in reaches spaced 1 throughout the stream during late summer and late winter. The intent of the efforts is to ' - 23