TagPort Of Seattle(2410)

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

Parametrix, Inc. prepared this Des Moines Way Nursery Mitigation Plan (AR 052455) for Port Of Seattle, Seattle-Tacoma International Airport, November 2001, project number 556-2912-001(03). The plan covers wetland restoration and enhancement at the Des Moines Way Nursery mitigation site, including grading design, expected hydrology, wildlife considerations, planting plan, vegetation monitoring, performance standards, maintenance and contingency

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,

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

This 2001 email chain discusses how fill materials used in the construction of Seattle-Tacoma Airport's Third Runway Embankment should meet environmental criteria under a 401 water quality permit. State regulators and Port of Seattle staff debated which materials — including topsoil, utility backfill, base course, and general embankment fill — required testing, supplier certification, or quality assurance plans to demonstrate compliance. Officials agreed that highly processed materials like topsoil could be covered by supplier certification, while bulk embankment fill would require a statistical sampling and QA/QC program.

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.

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.

Report prepared by Parametrix, Inc. for Port Of Seattle regarding the Miller Creek Riparian Corridor and Instream Enhancement Project and Wetland A17 Restoration, part of the Seattle-Tacoma International Airport Master Plan Update Improvements. Document AR 052286 covers wetland mitigation design, Army Corps of Engineers requirements, buffer averaging, hydrology, soils, vegetation, grading, landscape plan, performance standards,

Final meeting notes from October 30, 2001 Low Flow Analysis meeting regarding Port Of Seattle’s revisions to the Low Streamflow Analysis and Summer Low Flow Impact Offset Facility Proposal per 401 Permit conditions for Sea-Tac Airport Third Runway. Attendees included Ann Kenny (Dept. of Ecology), Kelly Whiting and David Masters (King County), Lisa Scott (Corps

Memorandum dated October 30, 2001 from Michael Kenrick of Hart Crowser, Inc. to Jim Thomson of HNTB (project number 4978-06), CC Elizabeth Leavitt of Port Of Seattle, regarding wetland hydrology impacts of the Third Runway Embankment Fill at Sea-Tac Airport. Covers depression wetlands, slope wetlands, and riparian wetlands; references FEIS for the Master Plan Update