OCR Text |
Show ( 1909 1,909 ) Army Survey it shows 33 radically different ( 'Con- Con ) ditions . ( R . 161 . ) In 1909 the channel was split in two by an island ; there were two channels , one , on each side . On October 1 , 1928 ( , ) ) the flow was confined in a single channel . ( R . 161 , Plate 7 . ) The next bar is the Two ( Mile Kile ) bar and riffle , 1 % miles below Greenriver . ( Plate 6 . ) Comparison with Army 1909 Survey is shown on Plate 9 , ( condi condi- condi ) ¬ tions are very nearly the same . ( R . 162 . ) The next bar is Butterfly bar and riffle , 1 % to 2 miles below Greenriver . ( Plate 10 . ) Comparison with Army 1909 Survey is shown on Plate 11 . ( Re- Re ) duction in size of island ; west channel has widened ( materially niaterially ) ; east channel has widened materially . ( R . 165 . ) The next bar is the Auger , 41 2 mi . below ( Green- Green ) river . ( Plate 12 , Compl . Exh . 76 . ) This Bar is formed by debris brought into Little Grand Wash . Fall of about 31 : ft . at the riffle . Maintained its outline of 1909 . ( R . 163-164 . ) The next bar is the Farrer bar and riffle 5 miles , below Greenriver . ( Plate 15 . ) It is a ( so-called socalled ) crossing bar , and it has maintained its same ( rela Tela- Tela ) ¬ tive position . A crossing bar is a bar which builds itself up in a river , generally in straight stretches of the river , between bends ; it is formed by deposit of silt and sediment , extends ( from froni ) one bank to the other diagonally ; it may be 1,000 to 3,000 ft . long , as compared ( with Ndth ) a river of 400 or 500 ft . in width . ( R . 164 . ) ( 33307-31-VOL 3330731VOL ) 1- : 1 |