ANNEX K: TOWN OF WAKE FOREST
K.1.3 FLOOD Table K.3 Details the acreage of the Town of Wake Forest by flood zone on the effective DFIRM. Per this assessment, over 8 percent of the Town of Wake Forest falls within the mapped 1%-annual-chance floodplains. Table K.3 – Flood Zone Acreage in the Town of Wake Forest Flood Zone Acreage Percent of Total (%) Zone A 0.01 0.0001 Zone AE 1,074.5 8.7 Zone X (500-year) 26.3 0.2 Zone X Unshaded 11,310.4 91.1% Total 12,411.3 -- 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. Table K.4 provides building counts and values for critical facilities by flood zone in the Town of Wake Forest. Table K.4 – Critical Facilities Exposed to Flooding, Town of Wake Forest Flood Zone Critical Facility Count Structure Value AE 28 $130,276,916 X 110 $352,143,273 X, 0.2 PCT ANNUAL CHANCE FLOOD HAZARD 0 $0 Total 138 $482,420,189 Source: FEMA Effective DFIRM To supplement the IRISK assessment of property at risk from the 1% annual chance flood event, the planning team evaluated flood risk using a level one analysis in FEMA’s Hazus software. Per this analysis, a 1% annual chance flood event would cause an estimated $18.7 million in building related damages. The results of the Hazus loss estimate are summarized in Table K.5. Table K.5 – HAZUS 100-Year Flood Results, Town of Wake Forest
Total Buildings with Loss
Total Value (Building & Contents)
Estimated Building Damage
Estimated Total Damage
Occupancy Type
Estimated Content Loss
Loss Ratio
Agriculture
0
$0
$0
$0
$0
0%
Commercial
23
$1,912,000
$136,000
$456,000
$592,000
31%
Educational
4
$9,513,000
$381,000
$2,303,000
$2,684,000
28%
Government
1
$80,000
$3,000
$12,000
$15,000
19%
Industrial
10
$164,000
$56,000
$91,000
$147,000
90%
Religious
5
$456,000
$22,000
$159,000
$181,000
40%
Residential
89
$19,371,000
$9,913,000
$5,216,000
$15,129,000
78%
Total
132
$31,496,000
$10,511,000
$8,237,000
$18,748,000
60%
Source: FEMA Natural Hazards Risk Assessment Program
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 519
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