EXH1217049528

_ .... A Comparison of Pacific Groundwater and Hart Crowser Fill Modeling Approaches ii_.. B Estimates of Miller Creek Streamflow Effects as Predicted with Slice Model C Estimates of Historic Water Withdrawal in Miller Creek Buyout Area D HSPF Model Input and Results for Low Streamflow Conditions Port of Seanle i Seattle-Tacoma Airport Master Plan Update _' Low Streamflow Analys_ __" ,_42e 1601 _rREAMFLOW ANALYSIS.DOC AR 049530 LIST of TABLES Page Table ]: Recorded Average Flows August and September ............................................................ 1 Table2:HSPF Model StrcamflowinAugustandSeptemberfor1994LandUse Conditions......2 Table3:Seven-DayLow Flows(cfs)PerHSPF Model of1994Land UseConditions.................3 Table4:HSPF ModelStreamflowinAugustandSeptemberFor2006Land Use Conditions......3 Tablc5:Seven-DayLow Flows(cfs)PerHSPF Modelof2006LandUse Conditions.................3 Table6:EstimatesofMillerCreekStrcamflowEffectsfromFillInfiltrationDischarge_.............8 Table7:EstimatesofWalkerCreekStrcamflowEffectsfromFillInfiltrationDischargem...........9 Table8:Non-HydrologicChangesInSummer Streamflow(PGG Report)...................................9 Table9:MillerCreekReservedStormwaterReleaseRateDetermination...................................19 Tablel0:Des MoinesCreekReservedStormwaterReleaseRateDeterminationt......................19 Table11:Summary ofMillerCreekStreamflowEffects_............................................................26 Table12:Summary ofWalkerCreekStrearnflowEffectst..........................................................27 StrcamflowEffects...................................................28Table 13: Summary of Des Moines Creek LIST of FIGURES Page Figure 1: Annual Plow Duration Curves for A One-Foot-Wide Half Section of Runway and Adjoining Filter Strip ............................................................................................................ 12 Figure 2: Annual Flow Duration Curves for A One-Foot-Wide Section of Taxiway and Adjoining Filter Strip ............................................................................................................ 13 Figure 3: Annual Flow Duration Curves for A One-Foot-Wide Section of Connecting Taxiway and Adjoining Filter Strip ..................................................................................................... 14 Figure 4: Predicted Infiltration, PET and Total Recharge on Runway Filter Strip ...................... 16 Figure 5: Predicted Infiltration, PET and Total Recharge on Taxiway Filter Strip ...................... 17 Figure 6: Predicted Infiltration, PET and Total Recharge On Connecting Taxiway Filter Strip. 18 Figure 7: 7-Day Low Flow Occurrences in Miller Creek, 1949-1995 .......................................... 21 Figure 8: 7-Day Low Flow Occurrences in Des Moines Creek, 1949-1995 ................................ 23 Po_ ofSeattle i i Seattle-Tacoma Jirport…

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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 [...]