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Memo to Tom Schreiner 2 October 4.2002 <br />The compliance requirements described and illustrated above are adequate to protect the pipeline, and <br />are sufficiently conservative that strain gauge emplacements on the pipeline will not be required. Even <br />though the pipeline will not be destabilized through implementation of the proposed mine plan, Ute <br />Applicant should continue to pursue an agreement with the pipeline operator in accordance with Rule <br />6.4.19(a) of the Construction Materials Rules and Regulations of the Mined Land Reclamation Board. <br />The letter from Kaneb Pipeline to Larimer County indicates that the Kaneb would be willing to enter <br />into such an agreement. <br />The Applicant has provided stability analyses in an effort to demonstrate that a 50-foot mining setback <br />measured horizontally from the toe of the pit slope to the crest of the Hillsboro Ditch is sufficient to <br />prevent destabilization of the ditch. The mining plan provided by the Applicant,shows that mining will <br />encroach within 200-feet of the ditch over a short (approximately 150-foot) reach. The mining plan <br />map shows that mining will occur no closer to the ditch than about 125-feet. The Applicant must <br />understand that even though their stability analyses indicates that a 50-foot setback to the ditch will be <br />protective, the overriding permit compliance requirement is to mine to the lines illustrated on the <br />mining plan map, which requires setbacks much more than 50-feet. Again, the Applicant should <br />continue to pursue an agreement with the ditch operator in accordance with Rule 6.4.19(a). <br />cc: Carl Mount, DMG (via electronic transmission) <br />c:U1y Ilocumenfs\Stroh Pit Stabiliry.doc <br />