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Show 952 used ( "rapid" rapid ) and ( ( "swift swift ) water . " ( R . . 3740 . . ) ( Ac- Ac ) cording to his definition , as he uses the word I ( "rapid" rapid ) everything that he applies the name rapid to is a rapid . ( R . . 3741-3742 . ) Some people use the word ( "riffle" riffle ) for a small rapid . He uses the word i ( "rapid" rapid ) to cover such things as that . He intends it to cover everything that is worse than real swift water . ( R . 3742-3743 . ) The first rapid , then , according to his definition , is at Mile 124 . The next one , Mile 122.5 , ( approxi- approxi ) mately . The next one about Mile 121.9 . The next one about Mile 121.6 . The next one about Mile 118.2 , The next one just below the mouth of Gypsum Creek , at Mile 113.7 , approximately . The next one at Mile 98.5 . The next at Mile 95.2 ; ; next , Mile 94.7 ; the next , Mile 93 ; the next , 92.7 . Also at the following miles : 89.1 , 88.7 , 84.6 , , 83.3 , 82.7 ) 82.4 ) 80 ) 78.43 78 ) 77.51 76.91 74.61 71 , ) 70.4 ) 21.5 ) 21.4 ) 21 ) 20 , 19.9 ) 18.61 16.81 15.81 14.9 , ; 11.4 ; 10.9 , and 10.6 . That is all . ( R . 3744 . ) No rapids are enumerated between Grand Gulch and Piute Creek , a distance of fifty miles ; ; and , according to Mr . Hoyt , the drop of the river in that stretch is five and ( one-half onehalf ) feet to ( the t4e ) mile , , and the difference in elevation between the two creeks is two hundred and ( sixty-six sixtysix ) feet . . ( R . 3744-3745 . ) Swift water would be the rest of the San Juan between the rapids . ( R . . 3745 . ) The maps used by him and referred to were ( pub- pub ) lished by the United States Geological Survey , , and |