R2013-103 ADOPTING THE MACON COUNTY, ILLINOIS MULTI-HAZARD MITIGATION PLAN

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Stantec MACON COUNTY MULTI-HAZARD MITIGATION PLAN correlation with geographic information systems (GIS) to estimate structural vulnerability and critical facilities that are located within area floodplains. • Illinois State Hazard Mitigation Plan. The state hazard mitigation plan was useful in providing information for each hazard (i.e. identifying hazards), vulnerability classes, and assessment methods. http://www.state,i1,us/iema/planning/planning.htm • National Flood Insurance Program (NFIP). The County and each of the communities, with the exception of Argenta, Harristown, City of Macon, Maroa, Niantic, Oreana, and Warrensburg, enrolled in the NFIP. The NFIP establishes standards for development in the floodplain and provides flood insurance to property owners. The NFIP also maintains a database, which contains information regarding the number and value of flood insurance policies in each jurisdiction, the value of any claims paid, and the number of repetitive loss structures in the communities. • Upper Sangamon River Discovery Project. The Upper Sangamon Watershed Discovery Project was a partnership with the University of Illinois, ISWS, and FEMA to initiate FEMA's "Risk Map" process. The discovery process involved coordination with watershed stakeholders, data collection and analysis, a meeting with stakeholders in the watershed, and development of recommendations for future Risk MAP projects based on an analysis of data information gathered throughout the process. This information helped determine hazard impacts to Macon County. • Illinois State Water Survey (ISWS) Drouqht Study. The ISWS studied the potential impacts on the Mahoment Aquifer and Surface Reservoirs. The Decatur area was part of that study. This study examined the impact of current and future water demands on the streams and aquifers in east-central Illinois through the use of computer-based models. This study was incorporated into the Drought hazard of this plan. www.isws.illinois.edu/pubdoc/CR/ISWSCR2011-08.pdf • Lake Decatur Dam Operations and Maintenance Plan (O & M). The City of Decatur uses a current Operation and Maintenance Plan for Lake Decatur Dam. This document identifies the responsibility to perform routine operation and maintenance of the dam and appurtenances. This O & M manual is referenced within the Dam/Levee section of this plan. These plans, reports, and studies are incorporated or referenced throughout the Plan. If any plans, report, or studies were not included in the plan or if new documents are published, they may be added to the Plan during the next update. 3.0 Hazard Risk Assessment In order to identify and prioritize mitigation actions for Macon County, the vulnerabilities and risks posed by each hazard to the community's population and infrastructure must be identified and calculated. Risk is defined as the combination of probability of a hazard occurring and the damage caused by the hazard. It is often expressed in terms of damage dollars per year or One Team.Infinite Solutions. 12