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<br /> <br />A. <br /> <br />B, <br /> <br /> <br />. <br /> <br />",". <br />" <br /> <br />Figure 9. High-water marks from the 1921 flood and estimated <br />peak discharges of the 1921 and 1884 floods at the Grand <br />Canyon gaging station, (AI November 16, 1921, upstream view of <br />the future reach of the Grand Canyon gaging station. Visible on <br />the leb bank (right side of photograph) is the likely high.water <br />mark from the 1921 flood, This high.water mark is at the same <br />elevation as the highest high-water mark in parts Band C. "" <br />indicates the position of a reference point on the cliff common to <br />this view and to the view in part 8. The lower high-water mark <br />was probably produced during a flood that had a peak discharge <br />of 67,000 cubic feet per second at the lees Ferry Gage on August <br />25, 1921, Photograph taken by R,C, Rice of the U,S, Geological <br />Survey, Source of this and the photographs in parts Band C <br />Gaging station reconnaissance and construction reports, <br />Colorado River near Grand Canyon, Arizona, file stored at the <br />Federal Records Center in Denver, Colorado, in Accession No. 57- <br />64A.0423, Box 1 of 24, location No, 6247B,(1i1 November 16. <br />1921, view of the difl on the leb (southl bank of the Colorado <br />River across from the future site of the lower (right-bank) gage at <br />the Grand Canyon gaging station. "'" indicates the position of the <br />reference point in part A. Visible are the likely high-water marks <br />from the June 1921 flood and the lower.magnitude August t921 <br />flood. "2" and "3" indicate the positions of two reference points <br />common to this view and to the view in part C Measurements <br />made with hand levels in Oecember 2000 INJ. Hornewer. U,S, <br />Geological Survey, written commun, 20001 and July 2001 <br />confllm that the likely June 1921 high~water mark in this <br />photograph and in part C was the high.water mark at a stage of <br />33 feet measured by G,G, Sykes in t 924, Photograph taken by <br />R,C. Rice of the U,S, Geological Survey, <br /> <br />22 Computation and Analysis of the Instantaneous-Discharge Record for the Colorado River at Lees Ferry. Arizona-Mav 8,1921. through September 30.2000 <br />