Laserfiche WebLink
<br />I <br />I <br />I <br />I <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br /> <br />. . <br /> <br />, <br /> <br />~,. <br /> <br />,~.... <br />:....~""'-J: <br /> <br />. .. <br />" l"-d <br />,,!"~:"J":'-~~~ <br />..~ "....40 .....~ .~~ \ <br />..... " c',.>., . <br />~_..... ' <br />.. -' .. <br /> <br />- <br />. <br /> <br />,~ ~ <br />. , -' <br />.-......... Ii:!-. . <br />~.- ...: <br />" - ~, <br />"" '-'- <br /> <br />. <br />,- <br /> <br />- <br /> <br />"'" <br />" <br /> <br />Figure 3. Maintenance grouting repair and deteriorating at and below water line <br /> <br />I <br />I <br /> <br />I <br /> <br />Today, the concern is that the channel will not be able to pass the design flood flow. <br />According to the investigation done by the Corps of Engineers, the channel will be at risk <br />if such event occurs. The deteriorating channel mortar and stones could he eroded further <br />and be carried by the high velocity water. NRCS NPET also conducted a hydraulic study <br />that conlimls the high probability of failure. As calculated, a discharge capacity of 1,550 <br />cfs event would cause localized flooding of the town of Cree de. <br /> <br />I <br />I <br />I <br /> <br />As was studied by NRCS NPET and the Colorado Water Conservation Board, a 100-year <br />discharge of Willow Creek at the mouth of the channel would be 1,073 cfs (Yochum, <br />June 14,2002). For the replacement design of the channel, a discharge of 1,800 cfs will <br />be used. <br /> <br />I <br />I <br />I <br /> <br />KRCS Northern Plains Engineering Team <br /> <br />3 <br />