ANNEX C: TOWN OF APEX
C.1.3 FLOOD Table C.3 details the acreage of the Town of Apex total area by flood zone on the effective DFIRM. Per this assessment, over 4 percent of the Town of Apex falls within the mapped 1%-annual-chance floodplains. Table C.3 – Flood Zone Acreage in the Town of Apex Flood Zone Acreage Percent of Total (%) Zone A 0.0 0.0 Zone AE 779.6 4.6 Zone X (500-year) 6.3 0.03 Zone X Unshaded 16,039.5 95.3 Total 16,825.3 -- Source: FEMA Effective DFIRM; Wake County GIS Figure C.3 reflects the effective mapped flood hazard zones for the Town of Apex, and Figure C.4 displays the depth of flooding estimated to occur in these areas during the 1%-annual-chance flood. Table C.4 provides building counts and values for critical facilities by flood zone in the Town of Apex. Table C.4 – Critical Facilities Exposed to Flooding, Town of Apex Flood Zone Critical Facility Count Structure Value AE 17 $26,042,943 X 254 $973,768,575 X, 0.2 PCT ANNUAL CHANCE FLOOD HAZARD 2 $2,918,538 Total 273 $1,002,730,056 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 $11.7 million in building related damages. The results of the Hazus loss estimate are summarized in Table C.5. Table C.5 – HAZUS 100-Year Flood Results, Town of Apex
Total Buildings with Loss
Total Value (Building & Contents)
Estimated Building Damage
Estimated Content Loss
Estimated Total Damage
Occupancy Type
Loss Ratio
Agriculture
0
$0
$0
$0
$0
0%
Commercial
21
$5,134,000
$306,000
$1,127,000
$1,433,000
28%
Educational
0
$0
$0
$0
$0
0%
Government
0
$0
$0
$0
$0
0%
Industrial
6
$313,000
$65,000
$179,000
$244,000
78%
Religious
0
$0
$0
$0
$0
0%
Residential
75
$13,068,000
$6,635,000
$3,456,000
$10,091,000
77%
Total
102
$18,515,000
$7,006,000
$4,762,000
$11,768,000
64%
Source: FEMA Natural Hazards Risk Assessment Program
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 404
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