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Table 12.2 <br /> Numbers of Dams by NID Potential Hazard Categories <br /> <br /> NID Hazard Oregon Lane County <br /> High 128 9 <br /> Significant 151 7 <br /> Low 521 16 <br /> Undetermined 12 2 <br /> Total 812 34 <br /> <br />For Oregon, there are 128 dams in the High Potential Hazard Category. In Lane <br />County, there are 9 dams in the High Potential Hazard Category. These 9 dams, all of <br />which are federally owned and operated are listed individually in Table 12.3 below. <br /> <br /> Table 12.3 <br /> NID High Potential Hazard Dams <br /> Lane County <br /> <br /> NID NIB <br /> County Dam Name River City Height Storage <br /> {feet) {acre feet) <br /> Lane Cottage Grove Coast Fork W~llamette River COTTAGE GROVE 103 50,000 <br /> Lane Dexter Middle Fork Wdlamette River EUGENE 117 29,900 <br /> Lane Fall Creek Fall Creek SPRINGFIELD 205 125,000 <br /> Lane Dorena Row River COTTAGE GROVE 154 131,000 <br /> Lane Lookout Point Middle Fork Willamette River EUGENE 276 477,700 <br /> Lane Blue River Dam Blue River SPRINGFIELD 312 89,000 <br /> Lane Hills Creek M~ddle Fork Willamette River OAKRIDGE 341 356,000 <br /> Lane Cougar South Fork McKenzle River SPRINGFIELD 519 219,000 <br /> Lane Fern Ridge Long Tom River EUGENE 49 121,000 <br /> <br />Of these NID High Potentia~ Hazard dams all except Fern Ridge are upstream from the <br />Eugene/Springfield Metro Area. <br /> <br />12.4 Dam Failure Hazard Assessment: Eugene/Springfield l~etro Area <br /> <br />A 1987 report6 on Dam/Levee Failure by the Oregon Emergency Management Division <br />lists 51 historical dam failures in Oregon from 1896 through the 1980s. As of the time <br />of this report, no dam failure fatalities had been recorded in Oregon. However, the <br />potential for dam failure fatalities certainly exists in Oregon, in Lane County and in the <br />Eugene/Springfield Metro Area, albeit with a Iow probability of occurrence. <br /> <br />To evaluate the level of risk posed by the dams affecting the Eugene/Springfield Metro <br />Area, we consider the nine dams in the NID high potential hazard classification where <br />the potential impacts of failure, including life safety, are greatest. Much smaller dams <br />in the significant and Iow potential hazard categories do not pose a life safety threat <br /> <br />Public Review Draft: August 6, 2004 <br /> 12-5 <br /> <br /> <br />