EXH2014029275

5808 Lake Washington Blvd. N.E., Suite 200 Kirkland,Washington 98033-7350 November 2001 556-2912-001 (03) AR 029277 TABLE OF COI_ENTS Page EXECUTIVE SUMMARY ............................................................................................................... XII 1. INTRODUCTION ................................................................................................................ 1-1 1.1 PURPOSE AND NEED FOR THE PROJECT ....................................................... 1-2 1.2 PROJECT LOCATION ............................................................................................ 1-3 1.3 PROJECT DESCRIPTION ...................................................................................... 1-3 1.3.1 Runways and Taxiways ............................................................................. 1-10 1.3.2 Runway Safety Area Extensions / South 154mStreet Relocation ............. 1-10 1.3.3 The South Aviation Support Area. ............................................................. 1-12 1.3.4 On-Site Borrow Source Areas.................................................................... 1-12 1.3.5 Other Support Facilities ............................................................................. I- 14 1.4 RESPONSIBLE PARTIES .................................................................................... 1-14 1.5 DOCTIMENT ORGANIZATION ......................................................................... 1-14 2. EXISTING CONDITIONS IN THE PROJECT AREA ...................................................... 2-1 2.1 WETLANDS ............................................................................................................ 2-1 2.1.1 Wetland Delineation Methodology .............................................................. 2-1 2.1.2 Wetland Descriptions ................................................................................... 2-7 2.2 STREAMS ................................................................................................................ 2-7 2.2.1 Miller Creek Basin ....................................................................................... 2-7 2.2.2 Des Moines Creek Basin ............................................................................ 2-15 2.2.3 GiUiam Creek ............................................................................................. 2-16 3. NATURAL RESOURCE IMPACTS SUMMARY ............................................................. 3-1 3.1 WETLANDS ............................................................................................................ 3-1 3.1.1 Permanent Impacts ....................................................................................... 3-1 3.1.2 Temporary Construction Impacts ................................................................ 3-6 3.1.3 Fragmentation and Indirect Impacts ............................................................ 3-6 3.1.4 Watershed Impacts ..................................................................................... 3-11 3.2 STREAMS .............................................................................................................. 3-11 3.3 FLOODPLAINS ..................................................................................................... 3-11 3.4 DRAINAGE CHANNELS ..................................................................................... 3-14 3.5 WATER QUANTITY AND WATER QUALITY ................................................ 3-14 4. SUMMARY OF MITIGATION, MONITORING, MAINTENANCE, AND CONTINGENCIES ............................................................................................................... 4-1 4.1 MITIGATION STRATEGY .................................................................................... 4-1 4.1.I On-Site Mitigation ...................................................................................... 4-15 4.1.2 Off-Site Mitigation ..................................................................................... 4-19 4.2 ECOLOGICAL FUNCTIONS PROVIDED BY THE MITIGATION ................ 4-20 4.2.1 Vacua Farm Restoration and Miller Creek Relocation .............................. 4-20 4.2.2 Miller Creek Buffer Wetland Enhaac_nent .............................................. 4-23 4.2.3 Des Moines…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]