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.[:).,l'i ~"y~'n '-r' . , "'~ - "+;, ,:~~~;~.s:~;:~~~ 1 """"~\"'''"''''~ '__.'h~~ A1~":-~;~~'~:~~::_-'-'~--- -<", ~ ~ ~ '",,!l"___ ~-r I I /;-'cW" ;;';-tL~~>f; !if."~1J~_. )" - ::I ~ ""..,..-- - Figure 85. The right- to left.bank view of the Upper Cableway showing the Cable Gage on the left bank (appears as a vertical white stripe below the left- bank A-frame) High.water marks from the June 1921 flood are still visible 3 years after the flood (compare with same high.water marks photographed in September 1921 in fig, SIAl, High.water marks from the June 192t flood appear to be just above the elevation of the top of the Cable Gage, This elevation equals a stage of approximately 34.5 feet on the Cable Gage, which equals an elevation of 3.133.9 feet above the NGVD1929, Also shown in the foreground is a Price current meter and 75.lb weight suspended from the cable car. Tail of weight bent slightly upward after sounding rocky bonom. (Photo taken by W.EDickinson, US Geological Survey, May 1924). January 1929 March 1929 Lower Cableway completed at wider section between the Upper Cableway and the Lees Ferry Gage for making more accurate discharge measurements during periods of higher water (fig. I C). The section chosen was about twice as wide as the section at the Upper Cableway. Work on this project commenced with the pouring of the concrete anchorages in December 1927 and construction of the A-frames in January 1928. Cable was finally erected in January 1929 when the river was low enough to allow easier stringing of the long cable across the channel. Oliginally, it was hoped that the river would completely freeze over, making the cable stringing easier. In January 1929, the jDb was cDmpleted when the river at the chDsen cross-sectiDn was restricted tD Dnly a narrDW channel along the right bank, with the remainder Df the channel occupied by a wide sand bar. Upper Cableway was replaced and left A-frame Df the Upper Cableway was raised 3 ft and set Dn tWD CDncrete piers. The dugway road area between the gage hDuse and the cliff was lilled with rocks tD prevent drift from IDdging in the Dpening and endangering the stilling well and gage hDuse during peliDds Df high water. This was possible because the road tD the Did ferry crossing was nD IDnger used after the cDnstructiDn Df the NavajD Bridge across the CDloradD River, 4.3 miles downstream. March 1929 ..'>of 78 Computation and Analysis of the Instantaneous-Discharge Record for the Colorado River at Lees Ferry, Arizona-May 8. 1921. through September 30. 2000