2013-01-17_INSPECTION - M1987037HR

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OBSERVATIONS PERMIT #: M- 1980 - 037 -HR INSPECTOR'S INITIALS: MAC INSPECTION DATE: December 14, 2012 The inspection was conducted by Michael Cunningham of the Division of Reclamation, Mining and Safety (Division). Wayne Brantley of Pioneer Sand Company, Inc. was also present during the inspection. The Ingleside Quarry is located approximately 5 miles south of Livermore, CO in Larimer County. The site is permitted for 86 acres with a maximum allowed disturbance of 21 acres at any given time. The post- mining land use is rangeland. The permit sign was posted at the site entrance and the permit boundary was clearly delineated by monuments as required by Rule 3.1.12. The site was not being mined at the time of the inspection; no personnel were present. The Operator typically conducts blasting several times a year; blasting is conducted by Yenter Companies, Inc. Once the material is blasted it is crushed in a portable crusher and then sorted into product stockpiles which are located on the east side of the quarry. The Operator is mining into the limestone and sandstone beds which dip — 20 degrees to the east, mining is progressing to the east and then to the south. The Operator has committed to maintaining a highwall that is no longer than 1,200 linear feet. The Division reviewed a 2011 aerial photograph from the National Agriculture Imagery Program (NAIP). The NAIP image shows that the existing highwall on the west side of the quarry is — 1,200 feet in length. Therefore, the Operator should not mine any further to the south until reclamation is completed on the highwall. Alternately, the Operator may revise the mining plan through a Technical Revision to allow for a longer highwall. In addition, the Operator would need to post a increased financial warranty to account for the increased disturbance. The highwall is approximately 45' from the quarry floor to the crest of the highwall. The top portion of the highwall is near vertical and the bottom two - thirds are at the natural angle of repose of the beds (^'20 degrees). The Operator has maintained a 50 ft. setback from the quarry and the top of the western ridge in order to preserve the view shed of the residents to the west of the quarry operation. According to the Operator, material has been sold from the stockpiles within the past month. During the inspection the Division notified the Operator that if the site is inactive for 180 consecutive days or more, then the site would need to be placed into Temporary Cessation pursuant to Rule 1.13.5. As noted above, the product stockpiles are located on the east side of the quarry; the stockpile area encompasses approximately 6.5 acres. The overall disturbance is just under the 21 acre limit. Therefore, the quarry may not expand beyond its current extent until reclamation has been performed or until the Mining Plan has been revised. The Operator has a small fuel tank near the site entrance; the tank is stored with proper secondary containment. No spills or leaks were observed. Overall the site is very clean and is operated in an orderly manner. The Division currently holds a financial warranty in the amount of $60,200.00. The financial warranty was last calculated in 2003 as part of the approval of Technical Revision No. 1. The Division will recalculate the financial warranty amount as part of this inspection. Notice of any increase to the financial warranty amount will be sent under separate cover. This concluded the inspection. Page 2 of 3