ANNEX K: TOWN OF WAKE FOREST
Flood Zone
Acreage
Percent of Total (%)
Zone X (500-year) Zone X Unshaded
113.01
0.81
12,516.72 13,886.72
90.13
Total
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Source: FEMA Effective DFIRM; Wake County GIS
Figure K.3 reflects the effective mapped flood hazard zones for the Town of Wake Forest, and Figure K.4 displays the depth of flooding estimated to occur in these areas during the 1%-annual-chance flood. To supplement the IRISK assessment of property at risk from the 1% annual chance flood event in Section 4 and provide a clearer picture of the current property at risk in the Town of Wake Forest, current parcel data was evaluated to identify parcels developed since 2010. Using GIS analysis, parcels developed after 2010 were compared to the boundaries of the 1% annual chance floodplain to identify the exposure of newly developed property to the base flood. In most cases, a parcel was considered exposed to the floodplain if any portion of the parcel was located in the floodplain. This assessment does not evaluate flood impacts or provide damage estimates. However, this summary of development in or near the floodplain since 2010 provides some context to understand the degree to which the IRISK exposure and vulnerability numbers differ from current conditions. Table K.12 provides a summary by land class of parcel development located in the 1% annual chance floodplain from January 2011 to April 2019. Table K.12 – Parcels Developed 2011 or Later and Located in 100-Year Floodplain
Land Class
Number of Parcels
Sum of Building Value
Commercial
1
$6,625,596
Residential Less Than 10 Acres
26
$8,943,999
Grand Total
27
$15,569,595
Source: Wake County Open Data; retrieved April 8, 2019; FEMA Effective DFIRM
Table K.13 provides building counts and estimated damages for Critical Infrastructure and Key Resources (CIKR) buildings by sector and flood event in the Town of Wake Forest. Table K.13 – Critical Facilities Exposed to Flooding, Town of Wake Forest
Sector
Event
Number of Buildings at Risk
Estimated Damages
Commercial Facilities
100 Year
1
$25,973
All Categories
100 Year
1
$25,973
Wake County Multi-Jurisdictional Hazard Mitigation Plan 2019
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