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KITTITAS COUNTY <br />DEPARTMENT OF PUBLIC WORKS <br />PUBLIC WORKS — BOARD OF COUNTY COMMISSIONERS <br />STUDY SESSION STAFF REPORT <br />STUDY SESSION DATE. June 24, 2017 <br />TOPIC: Naneum Creek— Wilson Creek Split Structure <br />ACTION REQUESTED: Provide Staff Direction <br />LEAD STAFF: <br />Mark R. Cook <br />RECOA04E TDATION: <br />Staff has previously recommended no action. <br />BREIFING SUMMARY; <br />Spring runoff has produced wide spread damage in Naneum Creek watershed <br />t The diversion structure splitting creek flows is with <br />stop logs <br />% Splitting flows 50150 is difficult with the elevated streambed of Wilson Creek <br />Water Right <br />holders are <br />BACKGROUND: <br />In early December 2016, staff briefed the Board of County Commissioners (BOCC) on <br />issues surrounding the flow control structure on Naneum Creek (EXHIBIT 1). At that <br />time, the City of Ellensburg expressed interest in having the streambed in the vicinity of <br />the structure dredged anticipating potential increased flooding in spring of 2017. <br />Significant flooding has occurred in the Naneum watershed throughout this past spring. <br />One tributary of Nanuem Creek is now completely plugged with round rock and debris <br />making water delivery impossible. The flow control structure is now being <br />attemp to establish fifty percent (50°/6) flow delivery <br />to Wilson Creek. During the past week, numerous water right holders have been <br />gathering at the split discussing individual actions aimed at establishing flow delivery to <br />both stream systems. <br />Page 1 of 4 <br />PUBLIC WORKS BOARD OF COUNTY COMMISSIONERS WORK SESSION STAFF REPORT <br />