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1 <br /> � determine if fish are survi��ng and to ascertain the temporal and spatial pattern of habitat <br /> use by salmonids. Based on this data, a conclusion regarding the production of coho salmon <br /> � smolts and the survivai of cutthroat trout can be m�de. Also, spawner surveys will be <br /> conducted each fall to determine if adult coho salmon are returninE to the creek. The <br /> spawner surveys will begin three years after the first plant of coho salmon occurs. <br /> 1 Electrofishing results, rather than spawner surveys,will be used to detcrmine whether adult <br /> sea-run cutthroat trout are establishing themselves in the streams. <br /> ' CONTINCENCS' PLAN <br /> As stated in the performance standards section, if cutthroat trout are found to be <br /> � unsuitable for the 1Vetland Pond, then Boeing will work with �VD1V to identify and <br /> introduce an alternate fish species. <br /> � For Powder Mill Gulch Creek, stocking of coho salmon and cOtthroat trout will be <br /> conducted if a self-sustaining run of these species cannot be establithed. ]f the performance <br /> standard is not met (production of coho salmon smolts and cutthroat tro��t), Roeing will <br /> � under:ake appropriate studies to identify the cause of thc failurc and wi�l implement <br /> corrective actions as necessary. <br /> h11TiGATION PLAN SUMb1ARY <br /> 1 The existing wedand and stream channels on site cun•en;ly provida �in�i!ed values and <br /> 1 funetions due to the historie and ongoing adverse impacts. C)racli�:g �.nd filling activities in <br /> the late 1960s altered original grades, soils, wetland, and drainage patterns. <br /> The remaining wetlanJs are typically small and with some erceRtion the vegetation <br /> � diversiry and subsequent habitat is very limited. <br /> The stream channels on site have been excavatcd through fill or in some areas they <br /> � follow historic drainage patterns. None oF the streams providc fsh habitat and a majority <br /> are seasonal flows only. <br /> � The proposed wetland mitigation wittiin w�etland #11 will enlarge the eristingwetland <br /> and provide vegetation communiry diversity which will provide wildliCe habitat diversiry. The <br /> wetland will be a large contiguous system with a diversity of habitat types including several <br /> � communities not currently present on the Parcel. <br /> The enhancement within Japanese Gulch will liasten the development of a shrub and <br /> 1 dense cattail system which would not have developed within the s;�stem nar.�r�!!y. Tl�e range <br /> of shrub species as food sources and saturated zones for cattails would not have easily <br /> established in the area because of lack of seed source. <br /> � The restoration and enhancement of s�lmonid habitat within Powder Mill Creek will <br /> provide 7,900 feet of rearing and spawning habitat not currently available. r�y removing <br /> � existing blockages, placing weirs wiihin the box culvert, and impraving habita• ups�rc�m, a <br /> successful salmonid 6shery can be resturcd to Po.vder Mill Creek. <br /> � <br /> � - �9 - <br />