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XGreg Lewicki And Associates, PLLC <br /> 3375 W.Powers Circle Phone:(720)842-5321 Fax(303)346-6934 <br /> Littleton,CO 80123 E-mail:info@lewicki.biz <br /> June 30, 2020 <br /> Colorado Division of Reclamation, Mining, and Safety <br /> 1313 Sherman St,Rm 215 <br /> Denver, CO 80203 <br /> Ralston Quarry (M-1974-086)Technical Revision: Slide Repair As-Built <br /> Following the approval of Technical Revision 02, Asphalt Paving Company began repair work in <br /> the slide area on the west side of the Ralston Quarry to repair and remediate a soil slide that had <br /> taken place in 2018. Principal construction within the slide area was completed in May 2020. <br /> This as-built report demonstrates that construction was conducted to the approved specifications, <br /> or where field-fit changes were made,that the final installation satisfies all necessary <br /> requirements for slope stability and surface water hydrology protection. <br /> 1. General Construction <br /> Construction of the various regraded slope areas along the west side of the Ralston Quarry began <br /> the week of February P. The presence of snow and cold weather limited the construction <br /> operations. As can be seen in the weekly reports sent to the Division,the February and March <br /> snowfall and low temperatures kept construction progress slow. March saw the arrival of the <br /> COVID-19 virus, necessitating implementation of additional safety measures by both APC and <br /> their construction contractor. Once these additional measures were in place, construction work <br /> continued. The bulk of construction was completed in late April, with final grading and surface <br /> water control structure installation taking place in early May. All grading work onsite has taken <br /> place with the goal of having revegetation seeding in place before high temperatures are the <br /> norm for the summer. Seeding was completed at the end of May 2020. <br /> The earthwork conducted covered four zones identified in previous submittals to the Division. <br /> These zones are shown on Figure 1 and described in Table 1. <br /> Ralston TR 03 1 Graff I.rwicki and Aswiatm,PIRA' <br />