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u' ;n <br /> Transit Mix Concrete Co. <br /> Response: Figure C-2 has been revised to more accurately present the fence lines along <br /> Highway 115 as owned by the State of Colorado. <br /> Geotechnical Stability Exhibit(Rule 6.5) <br /> 18) In the Pit Wall Geotechnical Assessment, the Applicant mentions the six new monitoring <br /> wells and piezometer installed on site in July 2017, stating that although they were primarily <br /> intended to provide information on groundwater levels, they do provide information on rock <br /> types, rock quality, and other geotechnical information in the area. These 7 wells are listed in <br /> Table 1 —Borehole Details along with the 13 boreholes that were drilled previously. Please <br /> expand the response to Item No. 126 of the Preliminary Adequacy Review, specifying how <br /> information from the 2017 wells was used in the pit wall geotechnical assessment. <br /> Response: Geophysical logging was performed at boreholes LTC-GW-1, -2, -3, -4, -6, and -7, <br /> and this logging consisted of acoustic and/or optical televiewer logging to obtain fracture and <br /> bedding information. The LTC-GW-5 location was not logged as this borehole is adjacent to <br /> boreholes B5 and HC006-15. The geophysical logging results consisting of the logs and fracture <br /> tables were reviewed by the geotechnical engineers as part of the pit wall geotechnical <br /> assessment for fracture orientation, spacing, and aperture. The 2017 data interpretation <br /> supported the kinematic analyses completed on the geophysical and logging data from HC006- <br /> 15. <br /> Additional Items <br /> 19) Please review and respond to the adequacy reviews provided by Division staff Peter Hays <br /> and Elliott Russell (enclosed). <br /> Response: Responses to comments provided by Division staff are included below. <br /> 20) Pursuant to Rule 1.6.2(l)(c) and (2), the response to these adequacy items must be placed <br /> with the County Clerk and Recorder and thereby made available for public review. Please ensure <br /> the applicant's response to these adequacy items includes proof that this was done. <br /> Response: A copy of the signed receipt verifying filing with the County Clerk and Recorder <br /> will be provided to the Division. <br /> Hitch Rack Ranch Quarry(M-2017-049) <br /> Response to Comments—March 20,2018 <br />