ANNEX A: WAKE COUNTY UNINCORPORATED AREAS
A.1.2 DAM FAILURE
Table A.2 lists all high hazard dams located in unincorporated Wake County that have been identified by the North Carolina Dam Inventory with a condition assessment of “poor.” Table A.2 – High Hazard Dams in Unincorporated Wake County with Condition Assessment of "Poor”
Inspection Date 01/08/2026 12/01/2022 01/01/2025 05/01/2035 02/02/2024
Nearest Downstream City & Distance (mi.)
EAP in Place
Dam Name
NID ID
Panther Lake Dam
NC00876 NC04441 NC06435 NC07086 NC04576
Smithfield (35 mi)
No No No No No
Ballentine Farms Pond Dam Ransdell-Wake Chapel Dam Charleston Village Pond Dam
Marshall Pond #2 Dam
Forestville (0 mi.)
North Ridge Country Club Hole #13 Dam
NC06197 NC04949
02/01/2024 03/22/2025
No Yes
Kildaire Farms Dam
Source: North Carolina Dam Inventory, February 2024
A.1.3 FLOOD Table A.3 details the acreage of unincorporated Wake County’s total area by flood zone on the effective DFIRM. Per this assessment, over 10 percent of the unincorporated area in the County falls within the mapped 1%-annual-chance floodplains. Table A.3 – Flood Zone Acreage in Unincorporated Wake County Flood Zone Acreage Percent of Total (%) Zone A 0.0 0.0 Zone AE 33,965.7 10.4 Zone X (500-year) 1,223.3 0.37 Zone X Unshaded 291,765.5 89.2 Total 326,954.6 -- Source: FEMA Effective DFIRM; Wake County GIS Table A.4 provides building counts and values for critical facilities by flood zone in unincorporated Wake County. Table A.4 – Critical Facilities Exposed to Flooding, Unincorporated Wake County
Flood Zone
Critical Facility Count
Structure Value
AE
130
$5,586,720,501
X
553
$3,961,236,894 $261,523,780 $9,809,481,175
X, 0.2 PCT ANNUAL CHANCE FLOOD HAZARD
10
Total
693
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 $14.8 million in building related damages. The results of the Hazus loss estimate are summarized in Table A.5.
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 371
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