Wake County Hazard Mitigation Plan - Adopted 10-21-2024

SECTION 4: RISK ASSESSMENT

Category

Consequences

Continuity of Operations (including Continued Delivery of Services)

Damage to facilities/personnel in the area of the incident may require temporary relocation of some operations. Localized disruption of roads and/or utilities may postpone delivery of some services. Regulatory waivers may be needed locally. Fulfillment of some contracts may be difficult. Impact may reduce deliveries. Localized impact to facilities and infrastructure in the inundation area of the incident. Some severe damage possible. Localized impact expected to be severe for inundation area and moderate to light for other adversely affected areas. Consequences include erosion, water quality degradation, wildlife displacement or destruction, and habitat destruction. Local economy and finances adversely affected, possibly for an extended period of time, depending on damage and length of investigation. Localized impact expected to primarily adversely affect only the dam owner and local entities.

Property, Facilities and Infrastructure

Environment

Economic Condition of the Jurisdiction Public Confidence in the Jurisdiction’s Governance

HAZARD SUMMARY BY JURISDICTION The following table summarizes dam failure hazard risk by jurisdiction. Warning time and duration are inherent to the hazard and remain constant across jurisdictions. Spatial extent of any dam failure will be negligible relative to the planning area. Jurisdictions with high hazard dams within their boundaries were assigned a probability rating of possible and an impact score of critical. Jurisdictions with no high hazard dams were assigned a probability rating of unlikely and an impact rating of limited.

Spatial Extent

Warning Time

Jurisdiction

Probability

Impact

Duration

Score

Priority

Wake County

2 2 2 2 2 2 2 2 2

3 3 3 3 3 3 3 3 3 2 3 2 2

1 1 1 1 1 1 1 1 1 1 1 1 1

4 4 4 4 4 4 4 4 4 4 4 4 4

3 3 3 3 3 3 3 3 3 3 3 3 3

2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 1.8 2.4 1.8 1.8

M M M M M M M M M

Apex Cary

Fuquay-Varina

Garner

Holly Springs Knightdale

Morrisville

Raleigh

Rolesville

1

L

Wake Forest

2

M

Wendell Zebulon

1 1

L L

Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan

WSP June 2024 Page 97

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