All intermittent or perennial streams shall be protected from spoil by natural or constructed barriers. Stream channel diversions shall safely pass the peak run-off from a 10-year, 24-hour storm. Stream channel diversions shall be at least equal to the capacity of the unmodified stream channel immediately upstream and downstream of the diversion.
4 Va. Admin. Code § 25-31-460
Statutory Authority: §§ 45.1-161.3 and 45.1-180.3 of the Code of Virginia.