TagDes Moines Creek(169)

Floyd & Snider Inc. meeting notes summary (draft for review) covering 401 Permit negotiations between the Port Of Seattle and Washington State Department of Ecology (Ecology) regarding the Sea-Tac Airport Stormwater Master Plan Update and third runway construction, October 2 through November 29, 2000. Document ECY00009383/AR029061 covers technical issues including detention sizing, basin acreage discrepancies,

Final draft meeting notes prepared by Kate Snider of Floyd & Snider Inc. from the Sea-Tac Airport Third Runway 401 Permit Negotiations meeting held December 8, 2000. Attendees included representatives from Washington State Department of Ecology (Ray Hellwig, Kevin Fitzpatrick, Ann Kenny, Dave Garland), Port Of Seattle (Elizabeth Leavitt, Michael Cheyne, Keith Smith), King County

Floyd & Snider Inc. meeting notes summary covering Sea-Tac Airport Third Runway 401 Permit negotiations between Port Of Seattle and Washington State Department of Ecology (Ecology), October 2 through December 8, 2000. Documents master list of 401 Permit technical issues including Stormwater Master Plan detention sizing, basin acreage discrepancies, HSPF and KCRTS hydrological models, IWS

Floyd & Snider Inc. meeting notes summary covering 401 Permit negotiations between Port Of Seattle and Washington State Department of Ecology (Ecology) regarding the Sea-Tac Airport Third Runway and Stormwater Master Plan Update, October 2 through December 8, 2000. Document covers wetland issues only and includes a master list of 401 technical issues with resolution

Supplement Biological Assessment prepared by Parametrix, Inc. (December 2000) for the Federal Aviation Administration and Port Of Seattle for reinitiation and initiation of ESA Section 7 consultation on STIA Master Plan Update Improvements. AR 049788. Document covers hydrologic impacts and mitigation for Miller Creek, Walker Creek, and Des Moines Creek watersheds, including stormwater detention facility

This technical document describes hydrological modeling conducted for the Seattle-Tacoma International Airport (Sea-Tac) Master Plan Update, focusing on stormwater runoff analysis for Des Moines Creek, Miller Creek, and Walker Creek subbasins. It details the calibration of computer models using rainfall and evaporation data spanning October 1948 through September 1996, along with parameters for airport embankment fill materials. The analysis was used to evaluate future stormwater detention facility requirements associated with airport expansion projects, including the Third Runway.

Final draft meeting notes from November 29, 2000 (9:30am–2:00pm) prepared by Kate Snider of Floyd & Snider Inc. for Sea-Tac Airport Third Runway 401 permit negotiations between Port Of Seattle (Elizabeth Leavitt, Michael Cheyne, Keith Smith) and Washington State Department of Ecology (Kevin Fitzpatrick, Ann Kenny, Dave Garland), with King County (David Masters, Kelly Whiting)

Port Of Seattle report (AR 043696, Volume 1) examining effects of runway deicing chemicals on dissolved oxygen in receiving waters at Seattle-Tacoma International Airport for the 1999-2000 winter season. Documents ground deicing chemical applications including potassium acetate (PA, Cryotech E36 LRD), sodium acetate (SA), and calcium magnesium acetate (CMA) on airfield, ramp, and landside roadways.

Final draft meeting notes prepared by Kate Snider of Floyd & Snider Inc. for the Sea-Tac Airport Third Runway 401 Permit Negotiations meeting held October 31, 2000, 8:00–11:00 AM. Attendees included representatives from Washington State Department of Ecology (Ray Hellwig, Kevin Fitzpatrick, Ann Kenny), Port Of Seattle (Michael Cheyne, Elizabeth Leavitt, Keith Smith), King County

Agenda for Port Of Seattle Third Runway Flow Augmentation/Water Rights meeting dated October 31, 2000, with handwritten notes. Attendees included Port Of Seattle, Department of Ecology, Attorney General’s Office, and Seattle Public Utilities (SPU). Topics covered potential sources of stream flow augmentation water for Des Moines Creek: SPU Highline Well Field, Highline Water District Well