TagDes Moines Creek(169)

This King County map, dated March 9, 2004, identifies parcels within the Miller and Walker Basins that are likely to redevelop based on land and improvement values. It highlights features such as lakes, ponds, rivers, streams, and wetlands alongside redevelopment-candidate parcels marked in red. The map was produced by King County staff using data from multiple sources and is intended to support land use planning in these two drainage basins.

Map (AR 028386, PARA 0013189) showing potential mitigation sites evaluated in the Miller Creek and Des Moines Creek watersheds near Sea-Tac Airport. Displays numbered mitigation sites greater than 10 acres, airport runways (present and proposed 3rd runway), borrow/warehouse/parking/SABA areas, watershed boundaries, Puget Sound shoreline, Burien, Normandy Park, SeaTac, Angle Lake, Bow Lake, Burien Lake, Lake

Aerial map exhibit AR037231 showing site designation zones SDS-1, SDS-3, SDS-4, and SDE-4 in the Sea-Tac Airport vicinity, with DMC markers and parcel 1027 visible. Map includes hatched overlay areas indicating site boundaries and land use zones near Des Moines Creek and surrounding neighborhoods. Filed as exhibit in administrative record.

This document is a fact sheet accompanying an NPDES (National Pollutant Discharge Elimination System) permit issued to the Port of Seattle for Seattle-Tacoma International Airport, governing how the airport manages and discharges treated industrial wastewater and stormwater. It covers discharge locations into Puget Sound, Des Moines Creek, Miller Creek, and the City of SeaTac storm sewer system, and establishes effluent limitations and monitoring requirements. The permit addresses water quality standards, pollution prevention plans, and compliance schedules to protect surrounding waterways from airport-related contaminants.

Draft map (AR 035005, Exhibit 1015) showing restrictive covenant boundaries, sewer line easements, IWS line, Des Moines Creek, and surveyed OHWM on the south end of Seattle-Tacoma International Airport. Identifies the Tyee Valley Golf Course Mitigation Area and Des Moines Creek Mitigation Area, with a note that mitigation was required by the Washington State Department

AR 035003. Attachment F table comparing wetland mitigation projects — Vacca Farm, Miller Creek Buffer, Tyee Golf Course, and Auburn Wetland — against Society of Wetland Scientists (SWS) criteria including reinstatement of driving ecological processes, restoration integrated into the landscape, restores a persistent resilient system, results in historic wetland conditions, and performance standards based on

Exhibit AR034998-AR035000, Attachment E: Summary table of compensatory mitigation (on-site and off-site) for watershed, wetland, and stream impacts at Seattle-Tacoma International Airport related to third runway embankment and South 154th Street relocation. Details on-site permanent impacts including filling approximately 980 linear feet of Miller Creek channel, filling 8,500 cy of Miller Creek floodplain, and filling

Attachment D table summarizing wetland mitigation credit for Seattle-Tacoma International Airport Master Plan Update improvements. Documents in-basin mitigation (102.27 acres, 29.80 credit) and out-of-basin mitigation (65.38 acres, 42.91 credit) for a total of 167.65 mitigation acres and 72.71 total credit. In-basin mitigation includes wetland restoration at Vacca Farm (credit ratio 1:1), wetland enhancement at Vacca

Attachment C summarizing proposed mitigation actions to avoid and minimize wetland impacts for a runway project at Sea-Tac Airport area. Document details mitigation requirements and actions for Miller Creek, Des Moines Creek, Category II and III wetlands (Wetlands 3, 4, 5, 8, 9, 18, 37, 44, 52, A1, and Borrow Area wetlands B1, B4–B10, B15a,

Three bar charts showing 7-day low flow occurrences modeled using 1994 HSPF (Hydrological Simulation Program Fortran) for the period 1949-1995. Charts cover Miller Creek, Des Moines Creek, and Walker Creek, displaying occurrence counts (0-4) by date ranging from summer through winter months (June through December). AR034949-AR034951. Related to stormwater hydrology and low flow analysis for