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10/24/2016 <br />State.co.us Executive Branch Mail - Re: TR70 and SEDCAD model <br />From: Zuber - DNR, Rob [maiIto:rob.zuber@state.co.us1 <br />Sent: Tuesday, October 18, 2016 4:29 PM <br />To: Scott Wanstedt <swanstedt deserado.com> <br />Subject: Re: TR70 and SEDCAD model <br />Here is what I have so far. I look forward to working with you to iron these out. <br />• Pond nomenclature is inconsistent between Map 160 and SEDCAD output. For example, "Pond #2" on Map <br />160 is the same as "Pond #1" (Structure 3) in the SEDCAD run. Please revise one or the other. <br />• Structure #5, SWS #3 appears to be the pond itself as the time of concentration is 0.0 or non-existent in the <br />model tables. If this is correct, please explain why this method was not implemented for the other ponds. <br />• There are discharge pond dewater times above 13,000 hours. How were these determined and what is <br />significance for the overall model? <br />• For the 10 -year model, there are PSDs for each structure. Please explain why the sediment entering Structure <br />#3 contains much finer material than the sediment entering Structure #5. (From Structure #5 to Structure #7 <br />there is very little change in the sediment.) <br />• Map 160 shows boreholes SH -4a and SH -4d, but Map 147 shows SH -4. Please explain the difference. <br />. , 7 <br />303.866.3567, extension 8113 1 F 303.832.8106 <br />rob.zuber@state.co.us I http://mining. state. co. us <br />https://mail.googl e.com/m ai I/u/0/?ui=2&i k=e29129fcb5&view=pt&search= i nbox&th=157e32855f417db4&si m l=157e32855f417db4 2/2 <br />