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22 <br />Page of <br /> <br /> <br />6.In the SEDCAD model, flow into Culvert 81 should be for the 100-year runoff rather <br />than the 10-year runoff. Please submit an updated SEDCAD model including a 100-year <br />runoff to ensure Culvert 81 can sufficiently handle a 100-year precipitation event. <br /> <br />7. The Division has performed a cost estimate for the DWDA #2 Expansion and the removal of the <br />employee parking lot culverts. The total value of this estimate is $7,143.42 (see attached cost <br />estimate) compared to NECC’s cost estimate of $7559.68. The Division’s cost estimate is consistent <br />If NECC wishes to use the <br />with previous cost estimates approved by both the Division and NECC. <br />cost estimate calculated by the Division, please submit a revised estimate that matches the <br />estimate calculated by the Division. <br /> <br /> <br />If you have any questions, feel free to contact me at 303.866.3567 (x8164) or Zach.Trujillo @state.co.us. <br /> <br /> <br />Sincerely, <br /> <br /> <br /> <br />Zach Trujillo <br />Environmental Protection Specialist <br /> <br />cc: Jim Stover, J. E. Stover & Associates, Inc. <br /> Susan Patton, Agapito Associates, Inc. <br /> <br /> <br /> <br />