| OCR Text |
Show 113 hour during a period having a volume of flow ( equiva- equiva ) lent to about 2 miles an hour at the gaging station . . Using the same ratio velocities at the rapids during flood stage would approximate and possibly exceed 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 CiscOj Utah . ( -As As ) shown on Plate 2 , Compl . 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 lo'w-water lowwater ) period when the flow is about 1,500 ( second-feet secondfeet ) , to 7 miles an hour at flood stage . As shown oin Plate 7 , Compl . Exhibit ( 82-A 82A ) , the velocity exceeds 1.8 miles an hour for half of the time and is between 1.0 and 1.8 miles an hour for half the time . As heretofore stated these velocities may obtain approximately in the stretch from Moab to the mouth of the Green except at The Slide . Above Moab , they will not apply between Castle Creek and Nigger Bill Creek where the slope is much greater . . Velocities at The Slide were sufficient , as brought out in oral testimony , to almost entirely retard the ( up- up ) stream progress of a boat propelled by a 14 ( horse- horse ) power engine ( Blake Abs . R . Vol . 2 , pp . . 1332-1333 ) and at flood stage the velocity was such as to ( effectu effectu- effectu ) ally prevent the City of Moab from going upstream . . ( Lumsden , Abs . . R . Vol . 1 , p . 182 , and Anderson , , Abs . . Vol 1 200 ) R . . . . p . . , . . Colorado River at Lees Ferry , Arizona . . ( -As As ) shown on Plate 5 , Compl . Exhibit ( 82-A 82A ) , the velocity in the |
