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05/14/2010 •03:26 9702593631 <br />PAGE 01/01 <br />FOUR CORNERS MATERIALS <br />A division of Oldcastle 5W Group, Inc. <br />May 12, 2010 SENT VIA FACSIMILE <br />1 <br />Colorado Division of Reclamation, Mining & Safety <br />Durango Field Offiice <br />Attention: Bob Oswald `--? <br />691 C.R. 233, Unit A-2 . ?' <br />!angof <br />Durango, CO 81301 10 <br />M/ n of <br />RE: Corrective Action Plan- Cugnini Pit (# M-1.986-061) n?hg a d a/4a . <br />Dear Bob, <br />Pursuant to your inspection report the following describes our current corrective action <br />plan in regard to the breach in the retention pond in Mining Area 1. A few days after your <br />inspection on March 22, 2010, we deployed a backhoe to the site and excavated a <br />temporary diversion ditch and placed an earthen berm around the retention pond. This <br />was done to prevent any additional snowmelt or stormwater from draining into the pond. <br />Reviewing older aerial photographs of the site, it appears the existing pond was <br />excavated in an un-compacted fill area. It is our intent to excavate a new retention pond <br />northwest of the old one where we have determined the ground to be far more stable. <br />Further, the new pond will be located farther away from the top of the valley slope. <br />Some degree of regrading will be done to provide for drainage into the new pond. once <br />the pond and adequate drainage are in place, we plan to excavate, re-slope, compact, and <br />stabilize the area below the old pond.. <br />We will be prepared to complete this corrective action in the next few weeks. Please <br />contact me should you have questions or concerns. <br />Sincerely, RECEVID <br />MAY 2 <br />? 200 <br />Matt R. Carnahan <br />Resource/ Environmental Manager Divisiofi 0, r?cciQm n, <br />GAinirs0 rend Safety <br />Four- Corners Materials <br />P.O. Box 1969 o Bayfield, (0 81122 as 97D-247.2172 0 FAX: 970.259.3631