(A) Pipe conduits shall be of such design as to safely support the total external loads and shall convey flow without rupture or leakage.
(B) Unless otherwise approved by the chief, the minimum inside dimension of the pipe conduit shall be:
(1) Twenty-four inches for class I and class II dams.
(2) Eighteen inches for class III dams.
(C) All pipes shall have the ability to resist corrosion from surrounding soils and impounded materials based on current acceptable testing standards.
(D) Corrugated metal pipe and corrugated plastic pipe shall not be used.
Five Year Review (FYR) Dates: 3/7/2018 and 05/24/2023
Promulgated Under: 119.03
Statutory Authority: 1521.06
Rule Amplifies: 1521.06 , 1521.061, 1521.062
Prior Effective Dates: 04/15/1972, 10/15/1981, 12/09/1999, 01/16/2005