SECTION 4: RISK ASSESSMENT
Table 4.39 – Critical Infrastructure and Key Resources Buildings at Risk to Flood Events by Sector
Sector
Event
Number of Buildings at Risk
Estimated Damages
100 Year
4 1
$1,433,067
Banking and Finance
Floodway
$48,447
100 Year
184
$157,262,261
Commercial Facilities
Floodway
46 10
$7,942,338 $1,514,411 $255,532 $345,852
100 Year
Critical Manufacturing
Floodway
4 7 1 1 6 1
100 Year
Government Facilities
Floodway 100 Year 100 Year Floodway
$64,062 $74,308
Healthcare and Public Health
$2,245,553
Transportation Systems
$60,845
100 Year
212
$162,875,452
All Categories
Floodway
53
$8,371,224
Source: NCEM Risk Management Tool
To supplement the IRISK assessment of property at risk from the 1% annual chance flood event and provide a clearer picture of the current property at risk in Wake County, 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. However, for parcels where updated building footprints were available, the parcel was considered exposed only if the building intersected the floodplain boundary. 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. This information is presented by individu al jurisdiction in each jurisdiction’s respective annex of this plan. Table 4.40 provides a summary by land class of parcel development located in the 1% annual chance floodplain from January 2011 to April 2019. Table 4.40 – Parcels Developed 2011 or Later and Located in 100-Year Floodplain
Land Class
Number of Parcels
Sum of Building Value
Acres Greater Than 10 With House
21 14 30 20
$9,443,180
Apartment Commercial
$309,325,723 $437,590,714 $192,726,683
EXEMPT Forestry
1 1
$777,207 $76,222
Golf Course
Industrial
13
$63,502,639
Part Exempt
1
$541,282
Residential Less Than 10 Acres
434
$145,027,953 $16,116,150 $1,175,128,053
Retirement Home
2
Grand Total
537
Source: Wake County Open Data; retrieved April 8, 2019; FEMA Effective DFIRM
Wake County Multi-Jurisdictional Hazard Mitigation Plan 2019
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