Laserfiche WebLink
<br />Details of the flood risk at each site are provided in Section 5 (Subsection 5.3). It is possible to <br />make a few general observations about the reach of the Colorado River from Connected Lakes to <br />Rifle. All of the ponds would be affected by a 100-year flood. A 50-year flood would affect most <br />of them, through overtopping, through groundwater seepage, or through erosion of embankments. <br />Most ofthe ponds would experience limited damage or no damage during a 10-year flood. The 1983 <br />and 1984 floods are described in Subsection 2.2 (Recent Flood History). Speaking generally, those <br />floods showed that many low areas along the river, including some of these ponds, are subject to <br />inundation and/or bank erosion during floods smaller than a 50-year or 1 DO-year flood. In looking <br />at what happened at each site in 1983 and 1984 it is important to note that several of the sites <br />underwent significant man-made topographic changes after the floods (i.e regrading of gravel and <br />other materials) so the flood response might be different during the next flood. At the same time, <br />the changes were not specifically engineered with flood resistance, particularly resistance to erosion, <br />in mind. Some sites might look just the same during the next flood as they did in 1983 or 1984 <br />because of this lack of flood engineering, Every site would need some mitigation to protect it from <br />a 50-year or a I DO-year flood. Section 5 (Subsection 5.4) will provide detailed information on <br />possible mitigation measures for each site. <br /> <br />10 <br />