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3/8/2016 State.co.us Executive Branch Mail-Re:Culvert <br /> STATE, OF Hernandez - DNR Alysha <alysha.hernandez@state.co.us> <br /> �C�OLOR�'Al u ' <br /> Re: Culvert <br /> 1 message <br /> Zuber- DNR, Rob <rob.zuber@state.co.us> Tue, Mar 8, 2016 at 11:14 AM <br /> To: "WD & Andrea Corley Jr." <ajjc@att.net>, Alysha Hernandez - DNR <alysha.hernandez@state.co.us> <br /> Dr. Corley <br /> The Division has looked into the culvert and ditch and determined that they are large enough for the 100-year <br /> event. The watershed area above the road is about 1,340 acres. <br /> Rob <br /> Rob Zuber, <br /> Environmental Protection Specialist II <br /> Coal Regulatory Program <br /> COL011RADO <br /> ,�.: � �ivism 7rrl�of 1Recta�n at�iion, <br /> :unin and Safety <br /> Department of Nal.ural I�esources <br /> P 303.866.3567, extension 8113 1 F 303.832.8106 <br /> 1313 Sherman Street, Room 21 , Denver, CO 80203 <br /> rob.zuber@state.co.us I http:Urnining.state.co.us <br /> On Fri, Mar 4, 2016 at 7:50 AM, WD & Andrea Corley Jr. <ajjc@att.net> wrote: <br /> Al and Rob, <br /> Jack Robeda brought up the question about the Monarch Fan Road culvert on Magpie Ditch Diversion at the <br /> Feb. 24th inspection. Mr. Gorham dismissed Jack's concerns by saying this structure is a road embankment <br /> and not a dam, but if the culvert will not pass a large rain event it will act as a dam regardless of whatever <br /> name is applied. Based on the width and depth of the designed diversion, after allowing for freeboard, it has a <br /> far greater cross sectional area than the culvert. What is the watershed area drained by Magpie upstream of <br /> the Monarch Fan Road? What was the rain event used for the culvert capacity determination? <br /> Doug Corley <br /> https://mail.googl e.com/m ai I/u/0/?ui=2&i k=e29129fcb5&view=pt&search=i nbox&th=153577007dOc43ee&si m l=153577007dOc43ee 1/1 <br />