<html> <head> <title>Rule 74:02:08:08 Additional design requirements.</title> <META NAME="Keywords" Content="Administrative Rules 74:02:08:08"> <META NAME="Description" Content="Administrative Rules 74:02:08:08 Additional design requirements."> <meta name=Generator content="Microsoft Office HTML Filter 2.0"> <meta http-equiv=Content-Type content="text/html; charset=windows-1252"> <meta name=Originator content="Microsoft Word 10"> <style> <!-- --> </style> </head> <body lang=EN-US> <div> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>74:02:08:08.&nbsp;&nbsp;Additional design requirements.</b> In addition to the minimum spillway design flood requirements of §&nbsp;74:02:08:07, all new category 1 and 2 dams must have low-level drawdown facilities. If an existing category 1 or 2 dam undergoes extensive repairs which require complete drawing down of the reservoir or is being repaired after the dam has failed, a low-level drawdown facility must be installed. A low-level drawdown facility may be either a gated pipe through the embankment that would allow the release of water below the primary spillway or sufficient available pumping capacity to draw down the reservoir. A breach analysis report must be completed by the owner for the proposed dam if a preliminary risk assessment indicates that the dam is a category 1 or 2 dam and must be submitted to the chief engineer with the plans and specifications required by §&nbsp;74:02:08:09. A breach analysis, if required, must be performed with a simulated water surface at or above the top of the dam.</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>Source:</b> 13 SDR 49, effective October 27, 1986; 13 SDR 129, 13 SDR 141, effective July 1, 1987; 13 SDR 197, effective July 2, 1987; 15 SDR 158, effective April 23, 1989.</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>General Authority:</b> SDCL <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=46-2-5">46-2-5</A>, <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=46-7-3">46-7-3.</A></font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>Law Implemented:</b> SDCL <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=46-5-8">46-5-8</A> to <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=46-5-11">46-5-11</A>, <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=46-5-47">46-5-47</A>, <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=46-7-3">46-7-3</A>, <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=46-7-5">46-7-5.</A></font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </div> </body> </html>