Resolution No. 4814 - Laserfiche WebLink

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flooding on numerous rivers and streams throughout western Oregon. The 1996 flood may have been about a 25-year event. Therefore, this flood was not a really major flood event, much larger flood events are possible, and the 1996 experience should not be used empirically to gauge the level of flood risk for the Eugene/Springfield Metro Area. During this flood event, rising waters in the McKenzie River forced the evacuation of about 1,200 to 1,500 people in Iow lying areas of Springfield. In the Spdngfield/Thurston area along the McKenzie River about 35-40 homes were damaged, along with about 20 private roads and bridges and about 20 vehicles~ Widespread flooding was also experienced in the Mohawk Valley from Marcola to Springfield, with flooded homes on Sunderman Road and on Goat Road. The Springfield Golf Course suffered substantial damage with about 6 inches of silt and debris deposited on the greens and fairways. There were widespread road closures in Lane County and even Interstate 5 had water flowing across it just north of Eugene near the Boston Mill Road overpass. 6.3 Flood Hazards and Flood Risk: Within i~lapped Floodplains 6.3.1 Overview Flood prone areas of the Eugene/Springfield Metro Area include the FEMA mapped floodplains for the major rivers, including the Mohawk, McKenzie and Willamette (including the Middle Fork and the Coast Fork). FEMA mapped floodplains also include areas along Amazon Creek, the Mill Race and several smaller creeks (mostly in the western portion of Eugene). Maps 1E andlS show the FEMA mapped flood plains for Eugene and Springfield, respectively. The floodplains for each of the rivers and creeks mentioned above, and the smaller creeks, all contain areas of development at risk from flooding as shown on Maps 1E and 1S. The 500-year floodplains contain larger areas at some level of flooding from larger flood events. A few critical facilities have footprints within or very near the 100-year floodplains, including Camp Creek Elementary School, McKenzie Camp Creek Fire Station 16~2, Eugene Fire Station 9, and Sanf~a Clara Fire Station 62. Full details of these mapped floodplains are included on the several panels of the FEMA Flood Insurance Rate maps (June 2, 1999) that cover the Eugene/Springfield Metro Area, along with the accompanying Flood Insurance Study. For the Eugene/Springfield Metro Area, the FEMA floodplain maps include the following types of mapped flood plain hazard zones: 1. Zone AE, within the 100-year floodplain and with detailed flood hazard data, including flood elevation data, 2. Zone A, within 100-year flood plain, but without detailed flood hazard data or flood elevation data, Public Review Draft: August 6, 2004 6-2