Surface water diversions shall be installed as necessary where run-off has the potential for damaging property, causing erosion, contributing to water pollution, flooding or interfering with the establishment of vegetation. Diversions that will be removed in 18 months or less shall convey the peak run-off of a 1-year, 24-hour storm. Diversions that function more than 18 months shall be able to convey the peak run-off of a 10-year, 24-hour storm.
4 Va. Admin. Code § 25-31-480
Statutory Authority
§§ 45.1-161.3 and 45.1-180.3 of the Code of Virginia.