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FROM OakCreekPublicLibrary • PHONE N0. 1+970+736+8371 • <br />EXHIBIT D <br />Mine Plan <br />Nov. 09 1998 05:29PM P3 <br />14. Natural Gas Pipeline Monitoring_ T'he Applicant is proposing to mine closer than 200 feet to <br />the natwal gas pipeline which bisects the proposed mine azea. Geoteehtricial testing <br />commissioned by the Applicant has documented that cut slopes should not encroach closer than <br />S feet to edge of the current 50 foot natural gas pipeline easement. This means that no mining <br />will occur within 30 feet oa either side of the center line of the current easement as defined by a <br />survey which will locate the existing easement and establish the five foot off-set from this <br />easement which will be performed prior to any mining operations occurring at this site. <br />A suitable strain gauge identified by PSCo will be purchased by the Applicant and installed at <br />one location on each of the two pipelines which cross this property. These strain gauges will be <br />installed on the pipelines by PSCo and monitored by them on a quarterly basis. The Applicant <br />furthermore commits to maintain the norma1200 foot structure setback outlined in the DMG <br />regulations and will not conduct any mining operations within this 200 foot setback azea until the <br />strain gauges are installed and the initial readings taken and submitted to the DMG. The <br />monitoring information obtained from these two strain gauges will be submitted to the DMG on <br />a yearly basis in their Atrrma] Report. l-Iowever, in the event that unacceptable strains are <br />detected by the gauges as defined by PSCo, then the results from these readings will be <br />submitted to the DMG within 24 hours a$er the Applicant has knowledge of these potential <br />exceedances. <br />