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Mr. Mushinski <br />Page 2 <br />December 23, 2016 <br />7. The Division requests detail call -outs for all plan profiles for Sheets No. 22-28 of the design <br />drawings. All features should be labeled on the detail call -outs and referenced on the plan and profile <br />drawings. <br />8. Please specify if rebar will be used with the concrete lined storm water diversion ditches. If so, <br />specify the rebar size, spacing, and clearance. In addition, provide specifications for the type of <br />concrete to be used. <br />9. The construction schedule provided in Attachment A contains a task for disposing of waste in the <br />Minnesota Adit. Please provide an inventory of all of the materials (with approximate volumes) to be <br />placed in the Minnesota Adit. In addition, please clarify if the materials to be disposed of will be <br />contained to the Minnesota Adit or if they will be placed in the glory hole. <br />10. In regards to the construction schedule provided in Attachment A, the Division will conduct <br />inspections during the following phases of the alluvial valley excavation: <br />a. Prior to Site Clean Up <br />b. Prior to Excavation of Alluvial Fill <br />c. Prior to placement of temporary soil cap (if necessary) <br />d. Prior to Construction of WRP Diversion Channels <br />e. Post Project Completion <br />Please commit to notifying the Division in writing, at least two weeks prior to the commencement of <br />each of the above listed construction phases so that inspections may be scheduled. The Division may <br />schedule additional inspections as required. <br />Please remember that the decision date for this Technical Revision is December 30, 2016. As previously <br />mentioned, if you are unable to provide satisfactory responses to any inadequacies prior to this date, it <br />will be your responsibility to request an extension of time to allow for continued review of this Technical <br />Revision. If there are still unresolved issues when the decision date arrives and no extension has been <br />requested, the Technical Revision will be denied. <br />If you have any questions, please contact me at (303)866-3567 x8116. <br />Sincerely, <br />Michael A. Cunningham <br />Environmental Protection Specialist <br />CC: Wally Erickson, DRMS <br />Tim Cazier, DRMS <br />Steve Cohen, Cotter Corporation <br />