EXH2003029210

These meeting notes have been prepared by Kate Snider, Floyd Snider McCarthy, Inc. ATTENDEES Ann Kenny, Dept. of Ecology KellyWhiting, King County David Masters, King County Lisa Scott, Corps of Engineers Keith Smith, Port of Seattle Robin Kordick, Port of Seattle Paul Fendt, Parametrix Joe Brascher, Aquaterra Pony Ellingson, Pacific Groundwater Group Felix Kristanovich, Foster Wheeler Kate Snider, Floyd Snider McCarthy MEETING SCOPE AND AGENDA Work is underway by the Port of Seattle to revise the Low Streamfiow Analysis and Summer Low Flow Impact Offset Facility Proposal per 401 Permit conditions. In the process of preparing the revised document, Port of Seattle consultants identified errors in the low streamflow modeling that require correction in the revised document, and that will affect the conclusions of the low streamflow analysis. This meeting was ca_,ed by the Port to allow the Port consulting team to explain the modeling errors and revisions that will be made to correct the errors. DESCRIPTION OF ERRORS AND ASSOCIATED REVISIONS 1. Conversion factor error inembankment fill inputto HSPF: When output from the embankment modeling was input to HSPF, an error of 1/24th magnitude was made. Conversion of daily output to hourly _utput was occurringtwice - once by the modeler (Joe Brascher, Aquaterra) and once automatically within the HSPF program. This errer affects all areas where embankment discharge is input to low streamflow analysis. The error has been corrected in revised modeling which showsthe contribution of flow from the embankment fill to low stream flow is now 24 times…

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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 [...]