 Normal drainage patterns have also been altered further downstream in the Sellwood, Eastmoreland, Westmoreland, and Woodstock neighborhoods, where runoff flows into the Portland sewer system instead of into the creek.Six local political jurisdictions overlap with the Johnson Creek watershed.In 2000, 38 percent of the watershed was in Portland's city limits, 24 percent in unincorporated Clackamas County, 23 percent in Gresham, 11 percent in unincorporated Multnomah County, 4 percent in Milwaukie, and 0.1 percent in Happy Valley.