TagACC(1524)

An email chain discussing the application of ‘fill criteria’ under the 401 permit conditions for the Port of Seattle’s Third Runway project. Ed Abbasi provides guidance on how different fill materials (topsoil, backfill, fill borrow, gravel) should be handled, including certification and QA/QC requirements. The original emails from Elizabeth Leavitt and Beth Clark initiated the

Article by Scott A. Tobiason and Linda R. J. Logan published in ‘Industrial Wastewater’ magazine (WEF publication), November 2001, about whole effluent toxicity (WET) testing and source tracing at Seattle-Tacoma International Airport (STIA), operated by Port Of Seattle. Documents that galvanized metal roofing on cargo buildings contributed to elevated zinc concentrations in stormwater discharges from

Final Natural Resource Mitigation Plan (NRMP) prepared by Parametrix, Inc. for the Port Of Seattle, covering Master Plan Update Improvements at Seattle-Tacoma International Airport (Sea-Tac Airport). Document number 556-2912-001 (03), dated November 2001. Administrative Record document AR 029275–AR 029277.

A detailed map figure (Figure 1.3-1) from the Sea-Tac International Airport Master Plan Update showing improvement projects including the Third Runway, runway safety areas, Miller Creek relocation, MSE retaining walls, detention facilities, and various infrastructure modifications. The map highlights design modifications used to avoid or minimize wetland impacts throughout the construction area. It was submitted

This document summarizes the proposed Master Plan Update improvement projects at Seattle-Tacoma International Airport, detailing elements that will impact wetlands, floodplains, streams, and drainage channels. Projects include adding a third parallel runway, establishing runway safety areas, developing the South Aviation Support Area, and relocating roads and utilities. The document includes a comprehensive table of all

An email chain forwarding draft meeting notes from a low flow analysis meeting held October 30, 2001. Raymond Hellwig forwards the notes to Thomas Fitzsimmons, noting that revisions to the low flow analysis based on correction of previous modeling errors are reasonable but will require clear documentation and rationale. Cheryl Blaser of Floyd Snider McCarthy,

US Army Corps of Engineers Regulatory Guidance Letter No. 01-1, dated 31 October 2001, providing guidance for the establishment and maintenance of compensatory mitigation projects under Section 404(a) of the Clean Water Act and Section 10 of the Rivers and Harbors Act of 1899. Covers debit/credit assessment methodology, role of preservation, inclusion of upland areas,

Draft meeting notes from a Low Flow Analysis meeting held October 30, 2001, related to the 401 Permit Post-Issuance Clarification for Sea-Tac International Airport’s Third Runway. The notes describe modeling errors discovered by Port of Seattle consultants in the low streamflow analysis, including a conversion factor error in embankment fill input to HSPF that resulted

Final meeting notes from an October 30, 2001 meeting convened by the Port of Seattle to discuss errors identified in the low streamflow modeling for the Sea-Tac Airport Third Runway 401 Permit. The meeting covered six specific modeling errors and associated revisions, including a 1/24th conversion factor error in embankment fill input to HSPF, incorrect

Technical notes from Hydrocomp, Inc. (authored by Norm Crawford) describing the linkages between HSPF and Hydrus/Slice models for stormwater and groundwater modeling at Sea-Tac Airport’s new runway and taxiway areas. The document outlines how pervious and impervious land surfaces are modeled, how water moves through fill material and Vashon till, and provides eight recommended steps