Laserfiche WebLink
<br /> <br />• <br />2.05.3(3) Culverts and Ditches <br />A review of road drainage specifications requires that the following <br />clarifications be made in the permit renewal application: <br />1. As SEDIMOT II has been used to estimate peak discharge for the <br />revisions to the original culvert system, the extensive <br />description of the SCS method can be deleted in the permit <br />renewal application. Table 12-3a should indicate by footnote <br />which peak discharge method was used for all culverts to avoid <br />confusion. <br />RESPONSE: <br />See Table 12-3a - Culvert Specifications. <br />2.05.3(3) Culverts and Ditches <br />2. Culvert 39a was replaced by 46b and Culvert 41b was replaced by <br />40b. These changes should be corrected on Table 12-3a and also <br />on the Table of Contents page for Tab 12. <br />RESPONSE: <br />See Table 12-3a - Culvert Specifications. <br />2.05.3(3) Culverts and Ditches <br />3. Calculation of H/D for Culvert 37b indicates a value of 1.02. As <br />this culvert may be submerged at flows greater than the 10-year, <br />24-hour storm, inlet protection as well as outlet protection <br />should be installed at this location. <br />RESPONSE: <br />Culvert 37b has been deleted. Road C3 is no longer required. <br />2.05.3(3) Culverts and Ditches <br />4. A review of Road C4 shows the roadside drainage ditch outlets <br />onto a hillslope where the road ends. The Division requests that <br />the operator define what specific erosion control method(s) will <br />be used at this location. This information must be submitted <br />before the request for alternate culvert spacing <br />[4.03.1(4)(e)(vi)] can be approved by the Division. <br />RESPONSE: <br />Road C4 is no longer required. Erosion is no longer a potential <br />problem on this road. <br />5 <br />Revised 8/27/86 <br />