EXH 270: STIA Master Plan Update — Table A-3, Projects Requiring Stormwater Management

This document is Table A-3 from the Sea-Tac Airport Master Plan Update, outlining construction projects that require stormwater management. It details activities such as runway safety improvements, taxiway construction, terminal expansions, and embankment work, noting for each whether permanent stormwater detention was provided, the construction timeline, and the type of drainage facility used. Projects are categorized as either new or retrofit stormwater installations, with comments describing impervious surface impacts and drainage routing to temporary or permanent detention facilities.

Notes

Table A-3 from the Sea-Tac Airport (STIA) Master Plan Update Comprehensive Stormwater Management Plan (document 556-2912-001, July 2001), listing airport construction projects requiring stormwater management. Covers Runway and Taxiway projects (Runway 34R Safety Fill, Auburn Wetlands Mitigation, Miller Creek Relocation, Vacca Farm Floodplain Restoration, 154th/156th Street Relocation, Safety Areas 16R/16L, Miller Creek Sewer Relocation, borrow sites/embankment fill phases 1–4), FAA/NAVAIDS projects (Airborne Cargo relocation, New ATCT, Relocate ASR, ASDE/NAVAIDS, Interconnecting Taxiways 16R-34L), and Terminal/Landside improvements. Each entry includes construction start/end dates, permanent stormwater detention provided, year MPU in service, facility designation (SDS, SASA, MCDF, SDN, SDW, SDS3), new or retrofit classification, and comments on impervious surface conditions, TESC pond drainage, and regional detention. Exhibit AR019500–AR019502.

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