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JC York <br /> From: JC York <br /> Sent: Friday, November 11, 2022 11:34 AM <br /> To: Kristy Weyerman <br /> Cc: Chris Leone;Todd Yee <br /> Subject: Structure Agreement for PDC Tank Battery and Gas Line - Near CR 40 on North Side across from <br /> Cureton Gas Plant <br /> Attachments: Structure Agreement - PDC.pdf; Exhibit E1 - Mining Plan.pdf; Exhibit L3 - 22008 Hunt Pond Stability <br /> Report 11.9.22 SIGNED.pdf <br /> Kristy— <br /> Per our phone conversation attached is the structure agreement along with our mining plan map and our slope stability <br /> analysis.As discussed the Division of Reclamation Mining and Safety requires that we try to get a structure agreement <br /> with structure owners within 200 feet of the mine permit boundary. We have to have a factor of safety of 1.5 or greater <br /> for the DRMS to accept the static analysis and a factor of safety of 1.3 or greater for the pseudo-static(earthquake <br /> loading) and based on the analysis we have a factor of safety of 2.79 and 2.05 for the static and pseudo-static loading. <br /> Regards, <br /> J.C. <br /> J.C. York, P.E. <br /> J&T Consulting,Inc. <br /> 305 Denver Avenue, Suite D <br /> Fort Lupton, CO 80621 <br /> Office: (303) 857-6222 <br /> Mobile: (970)222-9530 <br /> FAX: (303) 857-6224 <br /> 1 <br />