Laserfiche WebLink
`. <br /> <br />• <br />t <br />As shown in Rpper~d ix D-2A3 E 4, Modification No, 2 of the permit <br />application and the Panorama Resource Services report of August 1, 1984 <br />the Sedimentation Pond B was constructed to contain in excess of a 10 <br />year-24 hour event. Rlso the spillway was dlsigned to pass safely the <br />25 year-24 hour event. <br />The amount the 12 inch gated spillway on the Rienau No. 2 Sedimentation <br />Pond B must be opened to allow for automatic deuatering with an average <br />retention period of 24 hours is 3.0 inches (See attached calculations). <br />I hereby certify ths.t these calculations and statements are correct <br />;: ithin the conf ine~ of the accuracy of the data provided by Northern <br />Co::l CO mP any. <br />-~ oy Wills, P.E. <br />~ _ <br />~" `~ _/ <br />_~ ~ <br />Date • 3 ~ ~ `~~ <br />..aUrlu Nrq~h„ <br />. ~: ;:r. +. ~ ~ :. <br />r .~~: <br />"•.~~,.bunri p~A <br />• <br />