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3. According to the Cabarrus County Commerce Department, 32,748 new residential permits were issued within the County's permitting jurisdiction from January 1993 to December 2009. Of these, 5% (five tenths of one percent) were for properties located in the 100 -year floodplain The NC Office of State Budget and Management projects a substantial increase in population than the Cabarrus County Commerce Department. The State Demographer's estimate is based on the rapid residential growth Cabarrus County experienced since the 2000 Census, but that growth has curtailed dramatically with the economic downturn. Based on County growth projections, it is estimated there will be an additional 38 housing units constructed in flood prone areas. 4. Applying the 2000 Census of Population and Housing average household size of 2.50 persons /unit to these 38 new residential units would indicate that 95 additional persons could be in harm's way during flooding if no changes are made in current housing development patterns within the County's permitting jurisdiction. Table B -7: Future Flood Vulnerability Current Residential Growth Patterns within Co nty Permitting Jurisdiction Number of Residential Number of Residential Number of Persons Building Permits Building Permits in Exposed to Flood Hazard Flood lain 1993 -2009 2010 -2020 1993 -2009 2010 -2020 1993 -2009 2010 -2020 Projected Projected Estimated Projected Increase Increase 32,748 1 7,223 160 38 400 95 Source: Cabarrus County Commerce Department. 5. Any increase in susceptibility to flooding cannot be allowed to occur. The County and municipalities have made changes to their plans and ordinances so that future growth and development is encouraged in areas of low vulnerability. These plans and ordinances encourage growth in areas currently equipped to handle increased density. Whenever possible they recommend and even require open space and recreational uses as appropriate uses in flood prone areas. By consistently implementing existing and new land use policies and regulations as proposed in the hazard mitigation plan, future vulnerability will be reduced. Strict enforcement of mitigation measures such as adherence to the Flood Damage Prevention Ordinance and the Unified Development Ordinance (where applicable) must be utilized to decrease vulnerability to hazards. 6. The data shown in Tables B -6 and B -7 are derived from calculations based on the assumption that prior trends in development will prevail. The economic downturn and current County ordinances have altered that trend and will significantly reduce these projected figures. Based on currently available information, future damage costs are estimated between 100,000 and 200,000 dollars. Annex B Vulnerability Assessment B -7 1 October 2004 Attachment number 7 F -6 Page 131