SECTION 4: RISK ASSESSMENT
Table 4.15 – Consequence Analysis – Dam Failure
Category
Consequences
Public
Localized impact expected to be severe for inundation area and moderate to light for other adversely affected areas. Localized impact expected to limit damage to personnel in the inundation area at the time of the incident. 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.
Responders
Continuity of Operations (including Continued Delivery of Services)
Property, Facilities and Infrastructure
Environment
Economic Condition of the Jurisdiction Public Confidence in the Jurisdiction’s Govern ance
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.
Jurisdiction Wake County
Probability Impact
Spatial Extent
Warning Time
Duration
Score
Priority
2 2 2 2 2 2 2 2 2 1 2 2 1
3 3 3 3 3 3 3 3 3 2 3 3 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 2.4 1.8
M M M M M M M M M
Apex Cary
Fuquay-Varina
Garner
Holly Springs
Knightdale Morrisville
Raleigh
Rolesville
L
Wake Forest
M M
Wendell Zebulon
L
Wake County Multi-Jurisdictional Hazard Mitigation Plan 2019
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