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Show buttes . ( Exhibit ( 58 5S ) , page 19 12 . ) ( ( Water NNI'atar NNIatar ) ( Supply Stipply ) Ptiper 617 , page 6 . ) ( Loper -Loper Loper ) ( Vol . 13 , ( page pacre ) 2397 ) , Kolb ( Vol . 5 , page 856 ) , Seitz ( Vol . 22 , pages 3996 , 4012 ) , ( and wid ) others who have been ( through throiigh ) all or portions of ( the t1te ) ( stretch stret6i ) . of the river between Grand Junction ( and aiid ) Castle ( Greek Creek ) in boats state that the river has the ( char- char ) . acteristics of a steep mountain stream ( with -with with ) ( many niany ) rocky rapids . The largest rapid is in ( "Westwater Westwater Westwater ) Canyon , located in Utah , just below the ( Utah- Utah ) Colorado State line , where the river drops 27 feet in a short distance . ( Sheet 23 , Exhibit 10 . ) This rapid ( Kolb , Vol . 5 , page 856 ) has been ( run rni ) about , once or twice . The mean flow of Colorado River at ( Moab Aloab ) as ( determined determine ) from the ( measurements nieasurements ) at the ( Geologi Geologi- Geologi ) . cal Survey gaging station near Cisco is 9,660 ( second-feet secondfeet ) , with a ( minimum minfinum ) ( daity daily ) of 866 ( second- second ) feet and a ( maximum maximuni ) daily of 73,200 ( second-feet secondfeet ) . The average mean monthly flow , August to March , is between 2,550 ( second-feet secondfeet ) and 5,870 ( second-feet secondfeet ) , and during the months of April to July is between 10,000 and 34,300 ( second-feet secondfeet ) . ( Exhibit 88 , page 32 . ) ( From Froin ) Castle Creek to Nigger Bill ( Creek Creeli ) about 8 ( miles -iniles iniles ) below Castle Creek and 4 miles above Moab , the slope is somewhat lower ( averaging averag-ing averaging ) only 4.4 feet to the mile much of which is concentrated at , rapids ( resulting residting ) from debris brought in by side , drainage . ( Exhibit ( 75 755 ) , pages 75 and 76 . ) From |