Laserfiche WebLink
<br />. <br /> <br />. <br /> <br />. <br /> <br />002219 <br /> <br />1186, 1198), January 21, 1927 (44 Stat. 1010, 1021), July 1, <br />1940 (54 Stat. 708), and the Act of June 28, 1946 (60 Stat. <br />338), Public Law 79-469, as amended by the Act of May 1, 1958 <br />(72 Stat. 101). The System is a comprehensive network of <br />dikes, levees, drainage channels, desilting basins, river <br />channel training structures, and other structures constructed <br />by the Bureau of Reclamtion throughout the length of the <br />lower Colorado River, providing varying degrees of <br />channelization and Floodway definition. Other program <br />activities carried out by the Bureau of Reclamation pursuant <br />to the Acts include river channel reconstruction, dredg ing, <br />bank stabilization, levee armoring, channel rectification and <br />modification, and phreatophyte control and removal. The <br />authorizing Acts also provided for the annual appropriation <br />of federal funds to carry out these activities as well as for <br />investigations and studies conducted in support thereof. <br /> <br />For the most part, the Colorado River Floodway flow <br />elevations fall within the existing river channel. However, <br />there are areas where the Floodway channel is not well <br />defined and has a meandering course whose flow carries a <br />heavy bed load. In these cases, additional required bank <br />stabilization, erosion control and protection, and channel <br />improvements and maintenance associated with the Floodway <br />flow need to be undertaken on a priority basis. There is <br />also a need to maintain active programs relative to removal <br />of rock and gravel from the Floodway contributed by various <br />washes and a need for vegetation management to maintain the <br />Floodway channel capacity. These activities all fall within <br />the Bureau of Reclamation's Colorado River Front Work and <br />Levee System Program. <br /> <br />There are other Floodway maintenance related activities <br />that fall within the responsibilities of other agencies that <br />should also be undertaken. <br /> <br />RECOMMENDATION <br /> <br />With respect to maintenance of the Colorado <br />Floodway channel capacity and flood plain management, <br />recommended that the following be undertaken: <br /> <br />Bureau of Reclamation, Department of the Interior <br /> <br />River <br />it is <br /> <br />(A) Maintain an active policy and practice of <br />removing outflows of rocks, gravel, and sand from <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 /> <br />III-ll <br />