Laserfiche WebLink
are 0.0 ml/l. The 25 year, 24 hour storm does not engage the emergency spillway and peaks at elevation <br />7,471.41. <br />For the post mining case, a 10 year, 24 hour storm produces 7.51 acre feet of runoff at the West Taylor <br />Sedimentation pond. As summarized in Table 4, peak reservoir stage while passing this storm is at <br />elevation 7,473.74, about 2.1 feet above the overflow of the primary (drop inlet) spillway and 2.06 feet <br />below the invert of the emergency spillway. Settleable solids released from the pond in the downstream <br />"null" modeling node are 0.0 ml/l. The 25 year, 24 hour storm barely engages the emergency spillway <br />and peaks at elevation 7476.52, about is 0.72 feet above the invert of the spillway. <br />The following items are also found in this exhibit: <br />Figures: <br />• Figure 1C-4, West Taylor Pond, Drainage Areas, Active Mining Case <br />• Figure 1C-5, West Taylor Pond, Drainage Areas, Post Mining Case <br />SEDCAD Model output results: <br />• SEDCAD Model Active Mining Case, 10 Year -24 Hour storm <br />• SEDCAD Model Active Mining Case, 25 Year -24 Hour storm, <br />• SEDCAD Model Post Mine Case, 10 Year -24 Hour storm <br />• SEDCAD Model Post Mine Case, 25 Year -24 Hour storm <br />Exh. 7-20C-2 Revision Date: 11/15/17 <br />Revision No.: TR -117 <br />