2010-08-26_INSPECTION - M1999058

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PERMIT #: M-1999-058 INSPECTOR'S INITIALS: GRM INSPECTION DATE: August 12, 2010 OBSERVATIONS OBSERVATIONS This inspection was conducted at the request of the operator, Colorado Stone Quarries. The Colorado Division of Reclamation, Mining, and Safety is monitoring progress of Mined Land Reclamation Board orders to plan and implement stormwater controls at the Yule Quarry as approved under amendment AM-01. The operator requested DRMS on-site review of a proposed addition of a diversion structure and progress towards meeting the MLRB ordered objectives. The Yule Quarry is a 110c permitted marble quarry located southeast of Marble, Colorado. Gary Bascom, representative for Colorado Stone and Greg Lewicki the operator's consultant accompanied the inspector on site. The inspector notes that the area has had heavy rains at and near the site for several days. This allowed for the observation of primary stormwater control infrastructure that has been constructed to date. The structures noted were the placement of suitable materials for road base and grading towards a primary control ditch on the highwall side, a new access road to sedimentation control ponds and sedimentation controls installed on the steep dump areas. Water flowing in the control ditch down the haul road and from the dump area was noted to be translucent but almost clear. This is an improvement over waters observed in the spring of this year which were milky white and heavily sedimented. Yule Creek was observed having worse water quality, being very dark in color, and heavy sediment load just above the permit boundaries to the south. The new access road for sedimentation control has been constructed. Final grading and base materials still need to be finished. The path sweeps a bit farther south due to equipment access issues. The path was noted as conceptual in the approved amendment to allow for such adjustments. The road is well within the permit boundaries. The operator and consultant reviewed with the inspector the addition of a diversion structure across the waste marble dump. The diversion will direct stormwater flow from the very steep waste piles to sedimentation pond # 4. By using the diversion the pond can be constructed farther away from permit boundary and somewhat alleviate concerns of the adjacent landowner. The ditch will be constructed using a rock pulverizer / excavator, hay bales as filler and concrete. The diversion structure will have to be added to the regular maintenance and inspection schedule once constructed. Overall the storm water control construction is well underway. The project will be close if not finished by the Board Ordered date of August 31, 2010. DRMS will do a complete compliance inspection in early September to document final construction lay-out and review engineering reports. Responses to this inspection report should be directed to Russ Means at the Division of Reclamation, Mining, and Safety, Grand Junction Field Office, 101 South 3rd Street, Room 301, Grand Junction, Colorado 81501, phone no. 970-241-1117. Inspection Contact Address Gary Bascom Colorado Stone Quarries, Inc. 501 W Park St Carbondale, CO 81623 Cc: Greg Lewicki and Associates Page 2 of 7