Resolution No. 4814 - Laserfiche WebLink

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projects for earthquakes or any other natural hazards. The role of benefit-cost analysis in prioritizing and implementing mitigation projects in the Eugene/Springfield Metro Rea is addressed in Chapter 4 (Plan Goals, Mitigation Strategies and Action Items). More detailed example evaluations of flood and earthquake mitigation projects the Eugene/Springfield Metro Area are given in the Appendices. 1.8 Hazard Synopsis To set the overall context of hazard mitigation planning, we briefly review the major hazards that significantly affect the Eugene/Springfield Metro Area. Some hazards affect the entire area, while other hazards have only localized potential consequences. The Eugene/Springfield Metro Area has several areas of flood plains mapped by FEMA. These include areas along the Mohawk River, the McKenzie River, the Willamette River (including the Middle Fork and Coast Fork), as well as areas along creeks, including Amazon Creek, and several smaller creeks. In addition, other portions of the Eugene/Springfield Metro Area, outside of the mapped floodplains, are also subject to significant, repetitive flooding from local storm water drainage. The entire Eugene/Springfield Metro Area region is subject to the effects of winter storms, including wind, rain, snow and ice, as well as secondary effects such as power outages. Portions of the hilly areas of the Eugene/Springfield Metro Area, especially the hills in southern portions of Eugene and Springfield are subject to landslides or mudslides, which may affect buildings, roads, and utilities. Much of the Eugene/Springfield Metro Area region is subject to some level or risk from major wildland/urban interface fires. However, residential areas near the edge of the Eugene/Springfield Metro Area, especially those bordering or impinging into forested areas have much higher levels of risk from wildland/urban interface fires. The entire Eugene/Springfield Metro Area region is subject to the affects of earthquakes, including not only major earthquakes on the Cascadia Subduction Zone off the Oregon coast, but also smaller crustal earthquakes within Oregon. The entire Eugene/Springfield Metro Area region is subject, to volcanic hazards from eruptions in the Cascades. The most likely effects are only minor ash falls, with perhaps some minor flooding from lahars into the McKenzie River far upstream from the Eugene/Springfield Metro Area. However, major volcanic events could affect the water supply because of ash falls into the McKenzie River watershed. Large portions of land along the Willamette and McKenzie Rivers, including highly populated areas, are in the inundation areas from dam failures. While dam failures are highly unlikely, the consequences of failure would be high. The entire Eugene/Springfield Metro Area region is subject to disruption of utility and transportation systems from winter storms and other natural hazards, as well as from anthropogenic causes. Public Review Draft August 6, 2004 1-14