North Carolina dam safety

Dams in Iredell County, North Carolina

By Michael Flynn, PE · water resources & dam safety engineer

Iredell County has 84 dams in the National Inventory of Dams, of which 27 are classified high hazard (Class C) and 15 intermediate hazard (Class B). Inventory, hazard classification, condition ratings and emergency action plan status, with the North Carolina requirements that apply to each.

Iredell County dam inventory — NID extract 2026-8-28
MeasureCount
Total dams84
Class C — high hazard27
Class B — intermediate hazard15
Class A — low hazard42
EAP required by statute (Class B + C)42
— with no EAP recorded16
Rated Poor3
Rated Unsatisfactory0
Median year completed1963
Oldest dam on record1930

What this means for owners in Iredell County

Of the 84 dams on record, 42 carry a statutory emergency action plan obligation under G.S. 143-215.31(a1) because they are classified Class B or Class C. 16 of those have no plan recorded in the national inventory — a 38% gap. Ownership across the county is 79 private, 2 not listed, 2 local government.

On condition, Iredell County has 3 rated Poor and 0 rated Unsatisfactory. A Poor or Unsatisfactory rating is a dam-safety finding, not a maintenance note: it means identified deficiencies that could lead to failure under the loading the dam is expected to withstand. Median completion year of 1963 puts the typical dam in the county at roughly 63 years old.

Requirements that apply

Hazard Classification
Screen a dam against the A / B / C criteria
Dam Breach Peak Discharge
Failure hydrograph for inundation mapping
Inflow Design Flood
Spillway design storm by hazard class

Data source. Dam counts, hazard classifications, condition ratings and EAP status are computed directly from the U.S. Army Corps of Engineers National Inventory of Dams national extract, stamped 2026-8-28. NID reflects what state and federal programs have reported to USACE; it can lag a state program's own records, and an "EAP Prepared: No" flag means no plan is recorded in NID rather than proof that no plan exists. Figures here are computed from the raw extract, not quoted from secondary reporting.

Scope. This page is general information about North Carolina dam safety regulation, current as of 2026-08-28. It is not an engineering opinion about any specific structure and it is not legal advice. Requirements change when the General Assembly amends the Dam Safety Law or the Environmental Management Commission amends the rules — always confirm against the current text of the statute and 15A NCAC 02K, and contact the NCDEQ Dam Safety Program for a determination that binds.

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