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EXHIBIT 1: RECOMMENDED RIVER STAGE HEIGHT FOR NWS FLOOD RISK CATEGORIES <br />Fvictina Prnn-1 <br />Category <br />GH o <br />GH <br />Q <br />Notes regarding proposed <br />We will monitor and work to observe flooding at GH 48.7 - 48.9 to verify this action stage. Our hydraulic <br />modeling indicates that at 1,230 cfs, the channel capacity has met capacity and minor yard minor yard <br />Action <br />50 <br />48.9 <br />1,230 <br />inundation in the Elk Meadows Subdivision. USBR stage and discharge records from over the winter <br />suggests this flow is associated with a stage height of 48.9'. Recent correspondence with Elk Meadows <br />property owners indicates yard flooding at about GH 49.0' <br />Property within the Elk Meadows Subdivision is expected to see backyard flooding up to 0.5 ft and the <br />Minor <br />51.3 <br />49.9 <br />1,483 <br />Pine Glen Subdivision begins to see minor yard inundation and channel capacity being met. <br />Elk Meadows Subdivision roads past the bridge become inundated and lots along Elk Meadows road <br />Moderate <br />N/A <br />50.7 <br />2,530 <br />become inundated. Pine Glen Subdivision to see additional yard inundation. Sun Island Subdivision <br />begins to see minor yard inundation and channel capacity being met. <br />Major <br />N/A <br />53.75 <br />5,572 <br />1 Extensive inundation of structures and roads. <br />GH Gauge Height (feet) <br />Q Discharge (cubic feet per second) <br />Page 3 of 4 <br />PUBLIC WORKS BOARD OF COUNTY COMMISSIONERS WORK SESSION STAFF REPORT <br />