Laserfiche WebLink
Kathy Welt <br />March 19, 2010 <br />Page 3 <br />Response: This discrepancy was a result an adjustment made late in the original <br />submittal designs to change from ditches for the sediment water conveyance to pipes. <br />This change was made in an effort to minimize potential impacts of erosive flow <br />velocities on the pile and surrounding environment. The design change was <br />inadvertently not reflected in the text (Section 3.2) and the SEDCAD runs. Section 3.2 <br />has been updated to indicate pipes will be installed for sediment water conveyance and <br />Section 3. 1, Modeling Results, includes an explanation of the textual discrepancy in the <br />SEDCAD runs. Additionally, a separate notice entitled "SEDCAD Model Output <br />Notice" has been added to the beginning of Appendix F SEDCAD Model Output to <br />explain that the term sediment ditch in the SEDCAD output actually refers to the <br />sediment pipes shown on the drawings. <br />9. CDRMS Comment: In Section 4.5 of Exhibit 82, please change the reference to Rule <br />4.10.1(3) to Rule 4.10.4(3). <br />Response: The change has been made as requested. <br />10. CDRMS Comment: Please add to Section 4.7 of Exhibit 82 a description of haul road <br />surfacing material. <br />Response: Section 4.7.3, Haul Road Surfacing, has been added to Exhibit 82. <br />11. CDRMS Comment: Please add to the reclamation plan in Section 8.1 of Exhibit 82 a <br />description of the routing of surface drainage on the perimeter of the refuse pile after final <br />reclamation, including surface runoff from the pile and runoff from adjacent undisturbed <br />areas. <br />Response: Section 8.1.4, Surface Runoff Routing After Final Reclamation, has been <br />added to Exhibit 82. <br />12. CDRMS Comment: In Section 8.1.3 of Exhibit 82 please replace the wording "the roadbeds <br />will be reshaped to fit the natural surrounding." with the following wording "reclamation <br />will be completed in accordance with Rule 4.03.1(7)(a) ." <br />Response: The wording has been replaced as requested. <br />13. CDRMS Comment: Please add RPE East to paragraph number 9 on page 2.05-47 of the <br />permit application. <br />Response: Mountain Coal Company will respond to this comment. <br />14. CDRMS Comment: Should the title of Detail 9 on Drawing C-12 be changed to "Typical <br />Haul Road Bench on Refuse Pile"? <br />PAMpls\06 CO\26\06261003 MCC Refuse Pile Site Review & Permit\WorkFiles\Permit Application\Response to Comments\2010-02-10\Response <br />Submittal Documents\2010-03-19 Barr Response Letter.doc