Appendix C.5 Fish, Wildlife, and Plants
Appendix C.5 Fish, Wildlife, and Plants Fisheries Technical Memorandum Wildlife Technical Memorandum Vegetation Technical Memorandum Memorandum of No Effects Determination for Federally Listed Threatened and Endangered Species C.5-1 HILLSBORO AIRPORT PARALLEL RUNWAY 12L/30R ENVIRONMENTAL ASSESSMENT APPENDIX C.5 Fish Technical Memorandum Administrative Draft Hillsboro Airport Parallel Runway 12L/30R Fisheries Technical Memorandum Prepared for Port of Portland July 2009 Prepared by In association with Summary This technical memorandum describes existing conditions, environmental consequences, and mitigation measures to avoid and minimize impacts of the Hillsboro Airport Parallel Runway Project 12L/30R on fish and fish habitat. Existing Conditions The Hillsboro Airport (HIO) and other lands in the vicinity owned by the Port of Portland encompass 965 acres. Of this area, 1.59 acres have been designated as stream habitat. This habitat consists of Glencoe Swale, an intermittent tributary of McKay Creek that crosses the north end of HIO. McKay Creek is a tributary to Dairy Creek, which in turn is a tributary to the Tualatin River, which joins the Willamette River at approximately river mile 28.5. At the southeast corner of HIO, a stormwater ditch conveys stormwater to Dawson Creek, which flows to Rock Creek, a tributary of the Tualatin River. McKay and Dairy Creeks provide habitat for several fish species including torrent sculpin (Cottus rhotheus), reticulate sculpin (Cottus perplexus), prickly sculpin (Cottus asper), redside shiner (Richardsonius balteatus), speckled dace (Rinichthys osculus), largescale sucker (Catostomus macrocheilus), rainbow trout (Oncorhynchus mykiss), cutthroat trout (Oncorhynchus clarki), Pacific lamprey (Entosphenus tridentate), Western brook lamprey (Lampetra richardsoni), and crayfish (Leader, 2001).
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