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<br />. <br /> <br />. <br /> <br />. <br /> <br />00271,3 <br /> <br />For...the_mo&t_par t, the_Colorado-Ri-,er .P'loodvay" flo..... <br />elevations fall, within the existing river channel. However, <br />there are areas where the Ploodway channel is not weLl <br />defined and has a meandering flow carrying a heavy. bed load. <br />In these cases, additional required bank stabilization"", <br />~J:osion control and protection, and channel -improvements and <br />maintenance associated with the Floodway flow .need to be <br />undertaken on a priority basis.. There is-also a need to <br />-maintain active programs relative to removal of rock and <br />gravel from the Floodway contributed by various washes and a <br />need foe vegetation management to maintain the Floodway <br />channel capacity. These activities all fall within the <br />Bureau of Reclamation's Colorado River Front Work and Levee <br />System program. <br /> <br />There are other Flood.....ay maintenance related activities <br />that fall .....ithin the responsibilities of other agencies that <br />should also be undertaken. <br /> <br />RECOMMENDATION <br /> <br />With respect to maintenance of the Colorado <br />Flood.....ay channel capacity and flood plain management, <br />recommended that the following be undertaken: <br /> <br />River <br />it is <br /> <br />~ <br />P:://V <br />ff/J!t. <br /> <br />] P-7/ 1"1 (j <br />t ~'1,c..lrtl'- <br />I I -#..0(. <br />~ <br /> <br />Bureau of Reclamation, Department of the Interior J ~ <br />(..O~. ',rQ.. <br /> <br />(A) Maintain an active policy and practice of -r."t ';/ I <br />removing outflows of rocks, gravel and sand from ,o~' <br />the river channel contributed by intermittent <br />flows from normally dry wash tributaries and <br />recommend to the Corps of Engineers and to county <br />and tribal flood control entities needed <br />tributary flow detention structures, debris <br />basins, and erosion control structures where <br />appropriate. Consideration of the effects of <br />these activities on fish and wildlife resources <br />should be included on project by project basis. <br />However, such consideration should not impair the <br />u~dertaking of emergency actions. <br /> <br />\ ~,r <br />Establ ish bank erosion and protection guidelines t"" <br />f . 1 d d " ,-,'-'", <br />or prlvate an s an malntaIn an actIve a"', - .,..... <br />assistance and advisory program with local Flood ..... c.a'" <br />Plain Administrators. <br /> <br />(B) <br /> <br />(C) Conduct a comprehensive assessment of needs for <br />bank erosion control and protection, and channel <br />improvement and training structures for the g\- <br />Floodway elevation flo..... and establish a priority <br />program of implementation for needed improvements. <br /> <br />III-ll <br />