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CO DRMS <br />Page 2 of 2 <br />October 26, 2017 <br />Division would also need documentation from the landowner approving leaving the structures in <br />place. <br />PIS Response: Please refer to Item 1 response. No structures are uniquely associated with the Rex <br />Quarry Mining Permit No. M-1977-304 nor intended to be covered by the Rex Quarry mine or <br />reclamation plans. Please note the approved Exhibit E Reclamation Plan Map excludes reclamation <br />of Tracts A, B, and C, as well as the access road to these areas, thus a TR should not be required. <br />Item 3 — If PLS intends to dispose of any rubble generated by the demolition of mine related structures <br />onsite, they will need to identify where this material will be placed. <br />PIS Response: Please refer to Item 1 response above. <br />Item 4 — Please provide the quantity of each item to be demolished. Below is a table identifying the <br />type of structure to be demolished and the unit of measure the Division needs to estimate the cost to <br />demolish the structure. <br />PIS Response: Please refer to Item 1 response above. <br />Item 5 — Please provide an estimate to backfill and grade the current mining disturbance to the <br />approved post mine topography. Please include an estimate of the volume of material that needs to <br />be moved and the corresponding push and/or haul distances and corresponding slope angles. <br />PIS Response: Please find the attached backfill task summary. The estimated backfill volume was <br />determined to be 319,813 cubic yards. The grade followed the reclamation plan details with a <br />combination of 2H:1V and 4HAV slopes. this is followed by the corresponding push distances. <br />If there are any questions regarding this submittal or if additional information is required, please feel <br />free to contact me at (605) 939-2690 or by email at CBeck@petelien.com. <br />Respectfully, <br />e ---T I - <br />Clinton I7. Beck, E.I.T. <br />Environmental Coordinator <br />Pete Lien & Sons, Inc. <br />Enclosures <br />Return Receipt: 7016 0910 0000 5705 5327 <br />