For small size category 3 dams with an emergency spillway, the minimum spillway design flood is a 25-year frequency if the product of the intermediate storage capacity times the effective height is less than 3000. For small size category 3 dams without an emergency spillway, the spillway design flood is a 25-year frequency if the product of the maximum storage capacity times the effective height is less than 3000.

Source: 13 SDR 197, effective July 2, 1987.

General Authority: SDCL 46-2-5 , 46-7-3.

Law Implemented: SDCL 46-5-8 , 46-5-30 , 46-7-3 , 46-7-5.