No. 15 Original, Brief for the United States, 1929

Brief for the U.S., 1929, p. 103

Colorado 103 ( Elver River ) ( Through Tkrouglb ) Cataract Ca iiyon ( -No No ) evidence ( lias blas ) been introduced to show that there is decided ( shift sliift- sliift ) ing of river bed in this stretch . Kolb , ( wko who ) has been through this stretch ( twice tvice ) , testified to always looking each rapid over before running it the ( sec- sec ) ond time , since there is often a rearrangement of the boulders and rocks in the rapids . No one ( per- per ) son had made a sufficient number of trips or ( obser obser- obser ) ¬ ( vations vatious ) in Cataract Canyon to be in a position to testify conclusively that changes of great ( magni magni- magni ) tude occur in the cataract section . Glen Canyon Section ( -The The ) most exact ( informa informa- informa ) tion relative to the shifting character of the bed of Colorado River ( in iii ) the Glen Canyon section , except at those sections where gravel bars or bedrock ( oc- oc ) cur is contained on Plate ( II-A IIA ) and Plate ( III-A IIIA ) of , Exhibit 82A . These cross sections are based on actual observations of ( depth deptli ) made by engineers of the U . S . Geological Survey in connection with their determination of daily discharge . They show conclusively that scour and fill amounting to as much as 17 feet has occurred in the river bed and that the average scour and fill across the entire cross section has amounted to 12 feet . Plate ( III-A IIIA ) especially shows the rapidity with ( which ivhich ) the river has scoured as ( shown slio-wil sliowil ) by a change of 5 feet in two days . Col . ( Dent Deut ) , Loper , Rust , Stanton , and others have also described the sand waves on the Colorado