ANNEX M: TOWN OF ZEBULON
M.1.3 FLOOD Table M.2 details the acreage of the Town of Zebulon by flood zone on the effective DFIRM. Per this assessment, around 5 percent of the Town of Zebulon falls within the mapped 1%-annual-chance floodplains. Table M.2 – Flood Zone Acreage in the Town of Zebulon Flood Zone Acreage Percent of Total (%) Zone A 0.0 0.0 Zone AE 209.9 5.0 Zone X (500-year) 2.0 0.05 Zone X Unshaded 4,000.3 95.0 Total 4,212.2 -- Source: FEMA Effective DFIRM; Wake County GIS Figure M.3 reflects the effective mapped flood hazard zones for the Town of Zebulon, and Figure M.4 displays the depth of flooding estimated to occur in these areas during the 1%-annual-chance flood. Table M.3 provides building counts and values for critical facilities by flood zone in the Town of Zebulon. Table M.3 – Critical Facilities Exposed to Flooding, Town of Zebulon Flood Zone Critical Facility Count Structure Value AE 12 $101,403,005 X 61 $100,041,596 X, 0.2 PCT ANNUAL CHANCE FLOOD HAZARD 0 $0 Total 73 $201,444,601 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 $2.6 million in building related damages. The results of the Hazus loss estimate are summarized in Table M.4. Table M.4 - HAZUS 100-Year Flood Results, Town of Zebulon
Total Buildings with Loss
Total Value (Building & Contents)
Estimated Building Damage
Estimated Content Loss
Estimated Total Damage
Occupancy Type
Loss Ratio
Agriculture
4
$195,000
$19,000
$67,000
$86,000
44%
Commercial
5
$464,000
$25,000
$133,000
$158,000
34%
Educational
2
$113,000
$5,000
$33,000
$38,000
34%
Government
1
$59,000
$1,000
$7,000
$8,000
14%
Industrial
5
$923,000
$175,000
$556,000
$731,000
79%
Religious
0
$0
$0
$0
$0
0%
Residential
28
$2,130,000
$1,084,000
$561,000
$1,645,000
77%
Total
45
$3,884,000
$1,309,000
$1,357,000
$2,666,000
69%
Source: FEMA Natural Hazards Risk Assessment Program
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 547
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