
A planning map from the Sea-Tac Communities Plan (document section 6.6.2) depicting the S.R. 509 corridor, showing the existing S.R. 509 route, proposed S.R. 509 extension, and south airport access roads in the SeaTac/Burien area of King County, Washington. The map is sponsored by the Port of Seattle and King County, revised April 22, 1975, and identifies key roads including Des Moines Way, Military Road, Highway 99, and Interstate 5.Open full document
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A planning map from the Sea-Tac Communities Plan (document section 6.6.2) depicting the S.R. 509 corridor, showing the existing S.R. 509 route, proposed S.R. 509 extension, and south airport access roads in the SeaTac/Burien area of King County, Washington. The map is sponsored by the Port of Seattle and King County, revised April 22, 1975, and identifies key roads including Des Moines Way, Military Road, Highway 99, and Interstate 5.