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This engineering report (facility plan) outlines improvements to the King County conveyance system serving the South Magnolia basin that are necessary to control CSOs in compliance with RCW 90.48.480 and WAC 173-245-020 (22).

This report is submitted in compliance with the first of three compliance schedule dates noted in Section S18 of the West Point Treatment Plant National Pollutant Discharge Elimination System permit (refer to page 53 of permit).

Final engineering report (facility plan), September 2011

Draft engineering report (facility plan), December 2010