| OCR Text |
Show at ( extreme -Ntreiiie Ntreiiie ) ( low-water lowwater ) period 61 when the flow is 1,500 ( second-feet secondfeet semid-feet semidfeet ) or less , to 8 miles ( an all ) hour at flood stage . ( The 'The The ) approximate number of days in each year when velocities occur between these two extremes are shown ( on oil ) Plate 7 , Exhibit ( 82-A 82A ) and indicate that for ( lialf half ) the time the velocity exceeds 2.85 miles an ( hour 'hour hour ) and for half the time less . As ( heretofore heTetofore ) pointed out these velocities would obtain approxi ( ¬ - ) mately between the ( mouth month ) of the San ( Kafael Rafael ) and the mouth of the river . At the various riffles or rapids above the mouth of the San Rafael the velocities were estimated by Hoyt ( Exhibit 75 ) to be about 6 or 7 miles an hour during a period having a volume of flow equivalent to about 2 miles an hour at the gaging station . ( Using- Using Using ) the same ratio velocities at the rapids during flood stage would approximate and possibly exceed ( 20 '20 ) miles an hour . The Army Engineers in State Exhibit 18 estimate velocities of 6 miles an hour , during periods of fairly low flow . Colorado River ( near neai- neai ) Cisco , Utah . ( -As As ) shown on Plate 2 , Exhibit ( 82-A 82A ) , the velocity in the thread of the current ranges from less than ( 1 I ) mile an hour at extreme ( low-water lowwater ) period when the flow is about 1,500 ( second-feet secondfeet ) , to 7 miles an hour at flood stage . As shown on Plate 7 , Exhibit ( 82-A 82A ) , the ( Telocity -velocity velocity ) exceeds 1.8 miles an hour for half of the time and |
