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Fort Morgan Farms, LLC <br /> Delta Reservoir—Response to Technical Revision No. 1 (TR-01) <br /> August 18,2021 <br /> limb of the SPR 1-PAC hydrograph. Maximum of approximately 4,800 cfs of water enters the <br /> east cell through more than 2,550 feet of opening on the SPR side with a maximum water depth <br /> of about 2.7 feet. Attachment A displays the timestep when the east pond has reached <br /> capacity. <br /> During the unshifted scenario (Design 7), the CLPR peaks several hours before the <br /> SPR. Right overbank flows from the CLPR immediately begin to fill in the West detention pond <br /> at 12pm on April 25t". The west cell reaches full capacity and begins spilling into the east cell <br /> at 7pm on April 271"through the designed spillway connecting the two cells. By May 1 It <br /> at Sam, <br /> the east cell has reached full capacity, nearly a full day before the peak of the SPR passes the <br /> site. Attachment B displays the timestep when the east pond has reached capacity. <br /> From these analyses, it is clear the same design objective is achieved when the <br /> hydraulic simulation is performed using the 4-PAC CLPR hydrograph as was achieved when <br /> using the 1-PAC CLPR discharges. The key aspect to be evaluated during these simulations <br /> was whether or not the east cell was full when peak discharge from the 1-PAC SPR event <br /> passes the site. It was found during both the shifted and unshifted analyses that the eastern <br /> cell reached full capacity at least several hours before the SPR peak passed the site. <br /> Attachments A and B display the flooding extent at the timestep when the east pond reaches <br /> capacity. <br /> Appendices <br /> Appendix A—Shifted 4-PAC scenario results figure <br /> Appendix B— Unshifted 4-PAC scenario results figure <br /> cc: <br /> FMF—Tech Response Memo-20210818.docx <br /> Galloway&Company,Inc. Page 2 of 4 <br />