74:02:08:07.03Design requirements
Section · Administrative Rules of South Dakota · View on sdlegislature.gov ↗
for category 1 tailings dams. Dams constructed to store, without discharge, tailings as defined by 45-6B-3 (14) shall be sized to retain the PMF plus at least a 100-year flood.
Source: 14 SDR 67, effective November 8, 1987.