S.D. Admin. R. 74:02:08:07

Current through Register Vol. 51, page 67, December 16, 2024

Section 74:02:08:07 - Minimum spillway design flood requirements - Exception

The hydraulic capacity of a dam must, by category and size, be such that the following minimum spillway design floods can be passed through the spillways without overtopping the structure:

CATEGORY	SIZE	SPILLWAY DESIGN FLOOD
3	Small	50-year frequency unless dam
qualifies for § 74:02:08:07.01
exception
Intermediate	100-year frequency
Large	0.5 PMF
2	Small	100-year frequency
Intermediate	0.5 PMF, unless dam qualifies
for § 74:02:08:07.02 exception
Large	PMF
1	Small	0.5 PMF
Intermediate	0.5 PMF
Large	PMF

A spillway system for a dam must meet the requirements in this section unless the owner can provide information and justification to show the chief engineer that the proposed design flow can be stored, passed through, or passed over the dam without failure of the dam or if a variance is granted pursuant to SDCL 46-7-5.3.

S.D. Admin. R. 74:02:08:07

13 SDR 49, effective 10/27/1986; 13 SDR 129, 13 SDR 141, effective 7/1/1987; 13 SDR 197, effective 7/2/1987; 14 SDR 67, effective 11/8/1987.

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

Law Implemented: SDCL 46-5-8, 46-5-30, 46-7-3, 46-7-5, 46-7-5.3.