Resolution No. 4814 - Laserfiche WebLink

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Similarly, acquiring elevation data for additional structures within the 500-year flood plain as well as for structures in other flood-prone areas outside of mapped floodplains wou~d greatly increase the accuracy of hazard, inventory, and vulnerability assessments for floods in the Eugene/Springfield Metro Area area. The best structure elevations (first floor elevations) are those determined accurately by surveying. Flood insurance certificates generally include survey elevation data. Absent survey data, however, useful estimates of elevations for structures can often be made by reference to elevations of nearby structures or public infrastructure with surveyed elevation data. in addition to elevation data, quantifying the level of risk faced by these structures requires basic data about each structure, including building data (square footage, number of stories, with or without basement), and information on the type and importance of function (residential, commercial, public). As noted above, some areas of the Eugene/Springfield Metro Area, outside of the mapped floodplains, are also subject to relatively high levels of flood risk. To quantify the level of flood risk posed by these areas, historical data should be compiled to include: frequency and severity of flooding. Severity of flooding can include estimates of past damages, if available, and/or simple narratives reporting whether the flooding in a given area is limited to street flooding only, or affects yards or buildings as well. The flood prone inventory of buildings, infrastructure and people in the Eugene/Springfield Metro Area is summarized below in Table 6.4. Table 6.4 F~ood Prone Inventory in the Eugene/Springfield Metro Area Public Review Draft: August 6, 2004 6-12