TagPollution Control Hearings Board(1507)

203 Fourth Avenue E. Suit__J_G S OFFICE Olympia, Washington 98501 (360) 943-2693 May 13, 2002 Ms. Robyn Bryant, Administrative Assistant Environmental Hearings Office 42246th Avenue SE Bldg 2 Rowe Six Lacey, WA 98504-0903 Re: ACC/CASE vs. Ecology/Port PCHB No. 01-160 Dear Ms. Bryant: Enclosed is the original Transcript of Proceedings in the

2. LAND USE CHANGES IN THE MILLER AND DES MOINES CRh_K WATERS_S ...................................................................................................................2o1 2.1 METHODS AND AVAILABLE DATA ................................................................2-I 3. WEIZ,a,NDS ........................................................................................................................3-I 3.1 LOCATIONS OF WETLANDS ..............................................................................3-I 3.1.1 WetlandInvam_rim....................................................................................3-I 3.1.2 SoilSurv_'yMaps .........................................................................................3-I 3.1.3 _ P_ Rmourr,_ ............................................................................... 3-5 3.1.4 Aerial Photographs....................................................................................... 3-6 3.2 WETLAND IMPACTS .......................................................................................... 3-14 3.3 REGULATIONS PROTECTINGWETLANDS .................................................. 3-16 4. STREAMS ...........................................................................................................................4-I 4.1 IvflI.I.k'R_ BASIN ........................................................................................4-I 4.1.IHistoricalConditionsandChangesSince1936...........................................4-I 4.1_. Cummt Conditionsm MilluCreek.............................................................4-I 4.1_3 CurrentConditionoffishHabitatinMillerCreek......................................4-5 4.2 _ CREEK F.STUARY .................................................................................4-9 4.2.1 Historical Conditions in Milla- Creek Estuary ............................................ 4-9 42.2 Current Conditions in Miller Creek E_ .............................................. 4-10 4.2.3 Curr_t Conditions in Walk_'Crvek ......................................................... 4-10 4.3 DES MOINF_.SCREEK .......................................................................................... 4-11 4.3.1 Historical Conditions in Des Moines Creek .............................................. 4-11 4.3.2 Current Conditions in Des Mom¢_ Creek.................................................. 4-12 4.4 DES MOINES CREEK ESTUARY ...................................................................... 4-16 4.4.1 Historical Conditions in D_s Momes Creek Esumry................................. 4-16 4.4.2 Curr_t Conditions in D_ Moinvs Creek Estuary .................................... 4-17 4.5 STREAM IMPACTS .............................................................................................4-18 4.5.1 C_t RegulatoryProtectionforStreamsandAquaticHabitats............4-I9 5. WILDLIFE HABITATS .......................................................................................................5-I 5.1 WT[.r_LIFEHABITAT TYPES ...............................................................................5-! 5.1.1 UplandSucc_,sional....................................................................................5-I 5.1.2 Agricultm'alHabitats....................................................................................5-I 5.1.3 UrbanHabitats..............................................................................................5-2 5.1.4 WetlandandAquaticHabitat.......................................................................5-2 5.2 HISTORICAL CONDITIONS AND CHANGES IN HABITAT TYPES AND AREA SINCE 1936........................................................................................ 5-3 Supplemental Information- C_.mmd_iveImpac_ ii August 8. 200l Mattle- Tacoma lnternatumal A #q_ort ._56-2912-001 Master Plan Upd_e K:iworlang12912tJ$2P1201tOJmput2001 P.EPORl_'tCAtmadmiv¢_ F._tg_ ¢_oc AR 050794 TABL_ OF CONTENTS (CONTINUED) Pa2e 5.3 WILDLIFE USE ................................................. --.................................................... ___ 5.3.1 Amphibians and Reptil_ .............................................................................. 5.3.2 Small Mammals ............................................................................................ ¢5_5 5.3.3 ............................................................................................ 5.3.4 Birds ............................................................................................................... 5.3.5 Avifauna of Wetlands ................................................................................. 5-13 6. SUMMARY .......................................................................................................................... 6-1 7. REFERENCES ...................................................................................................................... 7-1 APPENDICES A KING COUNTY SOIL SURVEY - 1952…

5808 Lake Washington Blvd. N.E., Suite 200 Kirkland, Washington 98033-7350 July 2001 556-2912-001 (28) AR 050780 Assessment of the Existing and Future Hydrologic Divide of Miller, Walker. and Des Moines Creeks after Construction of Master Plan Update Projects at Seattle-Tacoma International Airport Master Plan Update (MPU) construction at Seattle-Tacoma International Airport (STIA) will require earth movement, new pavement, and construction of new drainage systems. These changes potentially modify the location and area of land that drains to Des Moines, Miller, and Walker Creeks. The Governor's Certification requires that "the Port of Seattle will design and construct the third runway such that the project will not cause changes in the location of the hydrologic divide between Miller and Des Moines Creeks in a manner that alters the average instream flow of either creek." The following text, figures, and tables demonstrate the Port's compliance with this requirement of the Certification. Note that Walker Creek. a tributary of Miller Creek, has been separated and assessed individually for compliance with the Certification. Figures Ala and Alb show the delineation of drainage basins in 1994 (the "existing condition") and 2006 (the "future condition") after MPU completion. The area depicted on these figures shows what has been called the "STIA" area in the Comprehensive Stormwater Management Plan (SMP). The STIA area represents all of the drainage basins that include MPU projects. There are no MPU project areas outside of the STIA area; however, not all of the basins shown in the STIA area have MPU projects,…

Work Area 2 Stone Column Test Areas Third Runway Embankment Phase 4 SeaTac, Washington -T CROWSB¢ Prepared for HNTB July 24, 2001 4978-44 AR 050691 Er_ WW_'. Da r_c ro wse,_ co _" JDowsm Dehvermg smarter solutions Anchorage Installation and Verification Results Work Area 2 Stone Column Test Areas Third Runway Embankment Phase 4 Bo,,on SeaTac, Washington Chicago Prepared for HNTB Denver July 24, 2001 4978.44 Fairbanks Prepared by Hart Crowser,Inc. Jersey City Juneau BarryS.Chen, Ph.D., P.E. JohnP.Laplante SeniorAssociate Senior Staff Port_ao_ GeotechnicalEngineer Geotechnical Engineer 1910 Fairvlew Avenue East Seattle Seattle, Washington 98102-3699 Fax 206,328.5581 Tel 206.324.9530 AR 050692 " :_ CONTENTS Page INTRODUCTION 1 SUMMARY 1 PURPOSE AND SCOPE OF THIS REPORT 2 OVERVIEW OF TEST PROGRAM 2 Background on Stone Column Work 2 Hart Crowser Performed Construction QA during Column Installation 3 DISCUSSION OF INDIVIDUAL TEST AREAS 4 Test Area 1 4 Test Area 2 6 Test Area 3 8 Test Area 4 9 USE OF THIS REPORT 11 TABLE Summaryof ExplorationsinTestAreas FIGURES VicinityMap TestAreaLocationMap Column Layoutfor TestAreas1 and2 and Explorations Column and ExplorationLayoutfor Cut Area3 Column and ExplorationLayoutfor Cut Area4 APPENDIX A TEST AREA 1 APPENDIX B TEST AREA 2 Hart Crowser Page i 4978-44 July 24, 2001 AR 050693 CONTENTS (Continued) PaRe APPENDIX C TEST AREA 3 APPENDIX D TEST AREA 4 APPENDIX E LABORATORY TESTING PROGRAM Soil Classification E-1 Water Content Determinations E-1 Gram Size Analysis (GS) E-1 FIGURES E-1andE-2 ParticleSizeDistributionTestReports APPENDIX F PREVIOUS LABORATORY ANALYSES IN WORK AREA 2 FIGURES F-1throughF-4 ParticleSize DistributionTestReports Hart…

CorDorate Ch_ce • 9t t FifthAvenue.Sure 100 • KirkJand WA 98033 • I:_none425 82%770] • Fax425 827-5424 West Sound Office • 179 Maclrone Lane Norm • BambnclgeIslancI.WA 98110 • Pr_one206 780-9370 • Fax 206 780-9438 1254 AR 050641 DRAFT TECHNICALMEMORANDUM JUNE 19, 2001 ANALYSIS OF PREFERENTIAL GROUND WATER FLOW PATHS RELATIVE TO PROPOSED THIRD RUNWAY SEATTLE-TACOMA INTERNATIONAL AIRPORT 1.0 INTRODUCTION The Port of Seattle (Port) presents this technical memorandum in response to a request from the Washington Department of Ecology (Ecology). Ecology has asked the Port to respond to a concern expressed by members of the public and certain State legislators opposed to construction of the proposed Third Runway at Seattle-Tacoma International Airport (STIA). The issue presented is whether known contaminated ground water conditions located below the principal aviation operations and maintenance area (AOMA) of STIA will migrate to the third runway construction area due to the presence of subsurface utilities and/or perched zones acting as pathways of contaminant migration, and/or the natural westward flow of ground water in the upper-most regional aquifer (Qva). The purpose of this technical memorandum is to report the findings of the Port's evaluation of potential contaminant migration from the AOMA to the thirdrunway area. The scope of this technical memorandum is to review and evaluate available data to enable a technical conclusion in response to the issues raised about proposed construction of the third runway. The issue is the potential for ground water flow and contaminant migration from the AOMA to the construction area.…

2.1 Overview of the Borrow Areas and the Master Plan EIS Process 6 2.2 Site Soils and Geology 8 2.3 Site Hydrology 8 2.4 Wetlands 10 2.5 Other Anticipated Watershed and Habitat Issues 11 3.0 SUMMARY OF BORROW DEVELOPMENT OPERATIONS 12 : 3.1 Description of Site Preparation Activities 12 3.2 Description of Mining Practices and Operating Plan 14 4.0 CONCEPTUAL RECLAMATION PLAN 20 4.1 Description of General Parameters and Features 21 4.2 Reclamation Concepts 22 4.3 Description of Reclamation Plan 25 5.0 REVEGETATION PLANNING, WEED CONTROL, AND WILDLIFE 26 6.0 RECLAMATION AND REVEGETATION MONITORING PLAN 26 6.1 Reclamation and Slope Stability Monitoring Program 26 6.2 Revegetation and Stormwater Control Monitoring Program 27 REFERENCES 28 DRAWINGS Title Sheet,DrawingIndex,SiteAccessandLocationMap, andBorrowAreaand HaulRouteLayout Abbreviations/Legend/Notes Portof SeattleLandOwnership SouthAirfieldandBorrowArea ZoningMap Hart Crowser -oPa_'eiJ-4978-62 AR 050024 CONTENTS (Continued) DRAWINGS (Continued) Site Exploration Planand Perched Water-Bearing Zone Elevation Contour Map Shallow Regional Aquifer ElevationContour Map, Borrow Area 3 Hydrogeologic CrossSections Perched Water-Bearing Zone and Shallow Aquifer Hydrogeologic CrossSections Perched Water-Bearing Zone and Wetland Drainage Swale Wetlands Map Showing Pre-Mining ElevationContours Conceptual Haul Route Alternatives from Borrow Areas to Airfield Conceptual Detail - Haul Route CrossingDes Moines Creek Pre-Mining ElevationContour Map Year 1: Conceptual Mid-Year Mining Plan Year 1: Conceptual Mining Plan Near End of Year Year 2: Conceptual Mining Plan Near End of Year Year 1: Conceptual End of Year Segmental Reclamation Plan Year 2: Conceptual Endof Year Final Reclamation Plan ATTACHMENT 1 DNR COMMENT LETTER ON FINAL EIS ATTACHMENT 2 DNR COMMENT LETTER ON FINAL SEIS Hart…

TO:. Mr. Jim Thomson, P.E.,HNTB Corporation Boston FROM: Michael Bailey,P.E.,Hart Crowser, Inc_ RE: Post-EarthquakeReconnaissance and Photo Documentation STIA Third Runway Project Ch,cago J-4978-06 Denver "_ This memo and accompanying figures and photographs document observations by Hart Crowser on two occasionsfollowing the February 28, 2001, Nisqually earthquake. Two Hart Crowser engineers (myself and Doug Lindquist)accomplished an initial Fairb&nks reconnaissanceon March I, lessthan 24 hours after the earthquake. The initial reconnaissanceincluded the toe of existing embankment fill constructed in 2000 and 2001, and areas along the toe of the proposed embankment and at the location of the proposed West and North MSE walls. A Hart Crowser geologist,Derek Ormerod, accomplished a second reconnaissance on March 2, which covered the same areas and specifically added JerseyCity portions of the fill constructed in 1998 and 1999. Mr. Ormerod obtained photographic documentation of the observed conditions usingboth digital and film images. Hart Crowser's observationswere specifically intended to identify any areas of instability, Juneau including potential for: sloughingor bulges of the embankment, heave of the native ground surfaceadjacent to the fill, tension cracks, and liquefaction or evidence of lateral spreading. No evidence of any ground movement, liquefaction, or deformation of any kind related to the earthquake was observed. Our observations indicate the embankment performed well Long Beach in the earthquake, includingthose limited areas where previous surficial sloughs or erosion features had occurred at the time of construction. With respect to liquefaction, our reconnaissancespecifically included those areas of the proposed future embankment where prior geotechnical investigationsand analyseshad Portland…

5808 Lake Washington Blvd. NE, Suite 200 Kirkland, Washington 98033-7350 December 2000 556-2912-001(48) AR 049789 TABLE OF CONTENTS Page 1. HYDROLOGIC IMPACTS AND MITIGATION .................................................................. 1 1.1 INTRODUCTION ........................................................................................................ 1 1.2 MODIFIC .ATIONS AND REFINEMENTS TO PROPOSED ACTION ................... 2 1.3 HYDROLOGIC IMPACTS AND MITIGATION ...................................................... 3 1.3.1 Flow Impacts .................................................................................................... 3 2. PATHWAYS AND INDICATORS ....................................................................................... 19 3. REFERENCES ........................................................................................................................ 22 LIST OF FIGURES Figure Miller, Walker, and Des Moines Creek Watersheds ................................................................ 5 Proposed Stormwater Detention Facilities for Master Plan Projects ....................................... 9 Flow Duration Curve for Miller Creek at SR509 ................................................................... 13 Flow Duration Curve for Walker Creek at South 12thStreet ................................................. 14 Flow Duration Curve for Des Moines Creek at South 200 thStreet ........................................ 15 LIST OF TABLES Table Summary of Miller, Walker, and Des Moines Creek drainage areas at STIA and change in impervious area between 1994 baseline and 2006 future conditions (acres) .......... 6 Summary of required detention facility volumes ................................................................... 10 Summary of flood peak flow frequency results for Miller/Walker Creek subbasins (all values are cubic feet per second) ............................................................................................ 16 Summary of flood peak flow frequency results for Des Moines Creek subbasins (all values are cubic feet per second) ............................................................................................ 17 Estimated Low Stream Flow Changes .................................................................................... 18 Effects of Master Plan Update improvements for STIA on relevant indicators in Miller Creek ............................................................................................................................ 19 Effects of Master Plan Update improvements for STIA on relevant indicators in Des Moines Creek ................................................................................................................... 19 Environmental baseline conditions in Des Moines Creek, near STIA ................................... 20…

1.3.2 Runway Safety Area Extermom / South 1.gt_ Street Relocanon ............. 1-10 1.3.3 The South Aviation SupportArea (SASA) ............................................... 1-12 1.3.4 On-Sit, Borrow Source Areas.................................................................... 1°12 1.3.5 Other SupportFacilities ............................................................................. 1-14 1.4 RESPONSIBLE PARTIES .................................................................................... 1-14 1.5 DOCUMENT 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 Momes Creek Basin ............................................................................ 2°! 5 2.2.3 Gilliam Creek ............................................................................................. 2-16 3. NATURAL RESOURCE IMPACTS SUMMARY ............................................................. 3-1 3.1 WETLANDS .................................................................................. •......................... 3-1 3.2 STRY=ANLS..............................................................................................................3-10 3.3 FLOODPLAINS ..................................................................................................... 3-10 3.4 DRAINAGE CHANNELS ..................................................................................... 3-10 3.5 WATER QUANTITY AND WATER QUALITY ................................................ 3-13 4. MITIGATION, MONITORING, MAINTENANCE, AND CONTINCENCY OVERVIEW ........................................................................................... 4-.I 4.1 MITIGATION .......................................................................................................... 4-1 4. l.l On-Sit* In-Basra Mitigation ....................................................................... 4-.-I l 4.1.2 Off-Site Mitigation ..................................................................................... 4-.15 4.1.3 Replacement of Functiormby the Mitigation Plan. .................................... 4--16 4.2 MONITORING PLAN AND CONTINGENCY MEASURES ............................ 4-.I6 4.2.1 Monitoring Approach ................................................................................. 4-.I6 4.2.2 Adaptive Management Approach .............................................................. 4-22 5. IN-BASIN MITIGATION PROJECTS ............................................................................... 5-! 5.1 VACCA FARM MITIGATION .............................................................................. 5-2 Nantral Resource Mitigation Plan i December 2000 Seattle-Tacoma lmematmr_l Azrpon 556-2912-001 (03) Master Plan Update ¢:_rA...,_u_t_a,_tmlm,_mo_m,oa,_g,_ AR 048593 TABLE OF CONTENTS (eoeliaued) Pa2....,_e 5.1.1 Miller CreekRelocation andChannel Restoration Plan.............................. 5-3 5.1.2 Vacca FarmFloodplain and Wetland Restoration Plan ............................. 5-26 _.435.1.3 Lara Lake Shoreline Enhancement............................................................. 5.1.4 Implementation of the Vacca Farm Mitigation Projects ............................ 5.48 5.2 MILLER CREEK RIPARIAN AND INSTREAM ENHANCEMJD_ PROJECTS ....................................................... 5-5S 5.2.1…