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Show October 18 to 23 , 1928 : Miles 78 3.5 ( , ; ) 4 , ( 4.9'Y 49Y ) 7.81101 11.814 14 , 16.51 19.51 21 , 21.51 22 , 282 29.52 31.82 ( 33.8y 338y ) ( 36.5y 365y ) 39 , 40y 43 , 46.51 48.52 49.52 50 , 50.62 53.97 ( 54.2y 542y ) ( 54.4y 544y ) ( 55.5y 555y ) 56 ( , ) ) 571 59 , 61 , ( 62.8y 628y ) 64.4 , and 64.8 above the mouth of the Green River . Testimony by Col . Dent ( Vol . 7 , pages 1234 to 1238 ) indicates that when he made his examination beginning August 25 , 1929 , depths were such that boats drawing about 2Y2 feet grounded at the ( fol- fol ) ( lowing IoNving ) locations when the flow was about 6,000 ( second-feet secondfeet ) ( according to page 37 , exhibit 88 , on the average there are 228 days in the year when the flow is less than 6,000 ( second-feet secondfeet ) ) : Miles 643 4 , 64 , 63 ( , ) ) 57 % , 57 % ( , y ) 57 , 56y3 , 55y2 , 541 2,53 % ( , ) ) 53y ( 49V2 49Y2 ) ( , ) ) 462 43Y21 4314 Ly2 , 41140 % ( , y ) 402 352 34132 % 28y2 , 27y 25 , 24Y22 23 , 22 1 4,211 3 , 21,193 4,191 2y 192 17V2 , 16V2 , ( 153 L53 ) ir 143 47 141 22 ( 13 L3 ) % ( , 7 ) 122 111 27 10 % ( , 2 ) 9 % , 8 % , 8 , 71 2y 47 13 4 ( , 2 ) , 1-1 3 above the mouth of the Green River . Shaw ( Vol . 20 , page 3658 ) notes frequent groundings with boat drawing between 6 inches ( and and- and ) 8 inches of water ( , . ) Testimony by Virgil Baldwin ( Vol . 6 , ( pages pages- pages ) 11637 11742 1182 ) and numerous others , as ( listed listec-L listecL ) below , indicates that the depths are so shallow that boats drawing less then 21 2 feet ( frequently frequently- frequently ) ground . The detailed study of physical characteristics as contained in Exhibit 75 shows that the most ( com- com ) mon depths at the bends and between the bars is between 3 and 5 feet , while the ( depths clepths ) across ( the tha ) |