OCR Text |
Show these requirements can not 53 be met , the river is not navigable . Natural obstructions may interfere with navigation and prevent a river from being used as a highway of commerce as for instance erratic or undependable stream flow ; excessive quantities of sand and silt and other materials in suspension ; steep gradients which produce high velocities of stream flow ; many rapids ; sand bars ; shifting ( chan chan- chan ) nels ; sinuosity of the channel ; and terrain ( immedi immedi- immedi ) ately adjacent to the river of a character which permits a rapid ( run-off runoff ) from rains and thereby ( sub- sub ) jects the river to sudden and unusual floods . See the consideration given to such obstructions by this Court in Oklahoma v . Texas , 258 U . S . 574 , 587y 589 . See also Brewer Elliott Oil & Gas Co . v . United States , 260 U . S . 77 at page 86 , the finding of the ( Cir- Cir ) cuit Court of Appeals , and of the District Court , 270 Fed . 100 and 249 Fed . 609 , 619 , respectively . Some of the natural obstructions on the Green and Colorado River in Utah are as follows : Logs and d6bris ( Appendix to brief p . 100 , ( Excep Excep- Excep ) ¬ tion 21 ) are a hazard to the operation of boats during high water months of Spring and early Summer , and during the occasional floods of late Summer and early Fall . Ice ( Appendix to brief p . 101 , Exception 22 ) closes the rivers for practically 100 days of nearly every year . Floods during the Spring ( run-off runoff ) ( Ap- Ap ) pendix to brief p . 116 ) from May 1 to July 15 , nd during occasional storm floods of August and ( Sep- Sep ) tember ( Appendix to brief p . 116 , Exceptions 51 , 53 ) produces high water , accompanied by rapid velocities 35623-31-5 |