                                 CODE OF VIRGINIA

MAPPING OF DAM BREAK INUNDATION ZONES (§ 10.1-606.2)

A. An owner of an impounding structure shall prepare a map of the dam break
inundation zone or provide the limits of the dam break inundation zone in an
acceptable electronic format for the impounding structure in accordance with
criteria set out in the Virginia Impounding Structure Regulations (4VAC50-20).
Existing maps prepared by the locality in accordance with these regulations may
be used for this purpose.

B. All maps or limits of the inundation zone prepared in accordance with
subsection A shall be filed with the Department, the local emergency management
coordinator as designated by the locality, and the offices with plat and plan
approval authority or zoning responsibilities as designated by the locality for
each locality in which the dam break inundation zone resides.

C. Owners of impounding structures may be eligible for matching grants from the
Dam Safety, Flood Prevention and Protection Assistance Fund and other sources of
funding available to the Director to assist in the development of dam break
inundation zone maps and for conducting incremental damage assessments in
accordance with the Virginia Impounding Structure Regulations.

D. All properties identified within the dam break inundation zone shall be
incorporated by the owner into the dam safety emergency action plan of that
impounding structure so as to ensure the proper notification of persons
downstream and other affected persons or property owners in the event of an
emergency condition at the impounding structure.

HISTORY: 2008, c. 491; 2025, cc. 228, 241.