| OCR Text |
Show 41 Plate 2 of Appendix 0 of Compi . Exh . 76 is ( hy- hy ) drograph of the flood at Greenriver during ( Sep- Sep ) tember and October , 1928 , , and for comparison the hydrograpli of daily flow September and October , 1925 , which was an exceptionally high period of ( run-off runoff ) . . Also September and October , 1924 which , , ( 'was was ) an extremely low ( run-off runoff ) . . ( R . 190-191 . . ) On September 27 the inean flow was 2,830 sec . ( -ft ft ) . On the 28th the mean flow was 4,000 sec . ( -ft ft ) . That night the flood reached 6,000 sec . ( -ft ft ) . . October 4 , the flood reached 16,400 ( sec see ) ( -ft ft ) . Oct . . 15 the flood reached a peak of 16,000 sec . ( -ft ft ) , and on Oct . 31 there was a peak flood of 7,980 sec . ( -ft ft ) . . ( R . 191 ) He experienced flood of Oct . 14 and 15 . ( R . 1901- 191 . . ) Was in the canyon below mouth of San Rafael , , surveying bar at mile 80.5 , and survey not completed , , and next morning large portion of bar was submerged : : Dots on Plate No . 31 , Compl . . Exh . 76 , , show where bar was afternoon of flood . ( R . 191 . ) Silt is measured by taking samples of water , either by volume method or by per cent by weight method , the latter method is now the practice in the survey . . ( R . . 192-193 . ) Report ( ( Compl . Exh . . 75 ) of calculations of amount silt carried annually in Green River are based on ( scientific scieutific ) investigation . ( R . . 193 . . ) As shown on page 78 of his report , Bulletin No . . 67 , Dept . of Agriculture , entitled ( "Silt Silt ) in the ( Colo- Colo ) rado River , " , indicates between 10,000,000 and . 30,000,000 yards of sediment are carried ( an- an ) |
