TagThird Runway(1067)

A November 6, 2001 handwritten fax note discusses problems with noise modeling errors and how results will be integrated into legal policies. It notes that AK advised POS to produce a more complete and accurate document, and argues it is not reasonable to hold up port mitigation based on a mistake, stating that if there is no impact, there is no impact. The note also references consultant agreement on impact calculations and requirements related to 401 regulations submitted as group per FAA standards.

Memorandum filed by Citizens Against Sea-Tac Expansion (CASE) supporting its motion to intervene in PCHB No. 01-160, Airport Communities Coalition v. Washington State Department of Ecology and Port Of Seattle. CASE seeks intervenor status under Civil Rule 24 and WAC 371-08-420(1) in the appeal of Amended Clean Water Act 401 Certification No. 1996-4-02325 (Amended-1) issued

ACC’s Separate Statement of Legal Issues filed by Airport Communities Coalition (ACC) in PCHB Case No. 01-160 before the Pollution Control Hearings Board for the State of Washington, against the State of Washington Department of Ecology and Port Of Seattle. Filed November 2, 2001 via fax, received November 5, 2001. Lists 28 legal issues challenging

Hart Crowser, Inc. geotechnical summary report prepared for the Port of Seattle for presentation to the U.S. Army Corps of Engineers (Seattle District), dated November 2, 2001, project number 4978-06. Covers design of the Third Runway embankment and three mechanically stabilized earth (MSE) retaining walls (50–135 feet height) at Seattle-Tacoma International Airport (STIA). Addresses 17,000,000

Hart Crowser geotechnical summary report (project 4978-06) prepared for the Port of Seattle for presentation to the U.S. Army Corps of Engineers, November 2, 2001. Covers Third Runway embankment construction at Seattle-Tacoma International Airport: 17,000,000 cubic yards compacted earth fill, maximum fill thickness 165 feet, 2H:1V side slopes, three Mechanically Stabilized Earth (MSE) retaining walls

This November 2001 document from Parametrix, Inc. contains responses to U.S. Army Corps of Engineers questions regarding the Sea-Tac International Airport (STIA) Master Plan Update's natural resource mitigation project. It addresses technical questions about wetland mapping, watershed basin sizes, low-flow analysis, and cumulative wetland impacts across the Miller Creek, Walker Creek, and Des Moines Creek basins, showing projected wetland acreage reductions of approximately 3-4% with the project. The document also covers mitigation measures including wetland restoration sites and performance standards for invasive species control.

Port of Seattle Natural Resource Mitigation Plan figure (AR017604, Exhibit 46, dated 12-20-01) showing Master Plan Update Improvement Projects at Seattle-Tacoma International Airport (STIA). Map depicts Third Runway construction area, Runway Safety Areas (RSAs), MSE retaining walls used to avoid and minimize wetland impacts, relocated section of Miller Creek, Miller Creek Detention Facility, Lora Lake,

Natural Resource Mitigation Plan for Seattle-Tacoma International Airport (STIA) Master Plan Update, November 2001, document reference 556-2912-001 (03). Table 1.3-1 lists all proposed Master Plan Update improvement projects including: third parallel runway 16X/34X (8,500 ft), Runway Safety Areas (RSAs) for 16R/34L and 16L/34R, South 154th Street relocation, South Aviation Support Area (SASA) for cargo/maintenance, embankment

A study at Seattle-Tacoma International Airport found that galvanized metal roofing on cargo buildings was the primary source of elevated zinc levels in the airport's stormwater runoff, which drains into salmon-bearing streams including Miller Creek and Des Moines Creek. Researchers used whole effluent toxicity (WET) testing and source-tracing methods to identify the problem, focusing on one outfall (SDN1) that consistently showed higher zinc concentrations and toxic effects on aquatic organisms. The findings prompted the Port of Seattle to investigate remediation options as part of its stormwater pollution prevention program under its NPDES permit.

Memorandum dated November 1, 2001 from Elizabeth Leavitt (Port Of Seattle) to Muffy Walker (U.S. Army Corps of Engineers) regarding Army Corps Section 404 review of on-site borrow areas for Sea-Tac Airport Third Runway embankment fill. Covers Borrow Areas 1, 3, and 4 located in Des Moines and SeaTac; combined 6.1 million cubic yards of