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<br />c, <br /> <br /> <br /> <br />o <br /> <br />o 10 20 30 40 50 <br />STAGE AT THE LOWER (RIGHT-BANK) GAGE AT <br />THE GRAND CANYON GAGING STATION, IN FEET <br /> <br />Figure 9-Continued. High.water marks from the 1921 flood and estimated peak discharges of the 1921 and 1884 floods atthe <br />Grand Canyon gaging station, (C) Fall 1922 view of the cliff in part 8, '2' and '3' indicate the positions of the two reference points in part <br />8 The likely high.water mark from the June 1921 flood is still visible 1 year afterthe photograpli in part 8was taken, Also visible is the <br />likely high.water mark from the June 1922 flood that had a peak discharge of 116.000 cubic feet per second at Lees Ferry, Note that the <br />high.water mark from the 67,000 cubic feet per second August 1921 flood has been erased by the larger, more recent June 1922 flood, <br />Photograph taken by F,C, Ebert of the U,S, Geological Survey during the construction of the Grand Canyon gaging station, (lJ) Stage. <br />discharge rating CUN8 at the lower gage at the Grand Canyon gaging station defined by 3.703 pre-dam discharge measurements made <br />between November 12, 1922. and March 6, 1963, The "largest known flood" refers to the flood associated with the highest high-water <br />mark found by the National Park Service on September 24, 1919, during the construction of the Kaibab (Black) Bridge (bridge shown in <br />parts A-C). Description of the bridge construction was published in the Engineering News Record. of February 10, 1921. <br /> <br />f'\? r:> .\ 0" <br /> <br />Colorado River Floods at Lees Ferry 23 <br />