2015-04-14_INSPECTION - M1986079

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PERMIT #: M- 1986 -079 INSPECTOR'S INITIALS: TOD INSPECTION DATE: April 14, 2015 INSPECTION TOPIC: Signs & Markers PROBLEM/POSSIBLE VIOLATION: Problem: The mine identification sign was not posted at the entrance the mine site. This is a problem for failure to post a mine identification sign as required by Section 3.1.12(1) the Rules. CORRECTIVE ACTIONS: The Operator shall, at the entrance of the mine site, post a sign which shall clearly visible from the access road with the following: the name of the Operator, a statement that a reclamati permit for the operation has been issued by the Colorado Mined Land Reclamation Board; and the perr number. The Operator shall submit photo documentation that a proper sign has been posted by the correcti action date. CORRECTIVE ACTION DUE DATE: 6/29/2015 OBSERVATIONS This normal routine monitoring inspection was conducted by Tyler O'Donnell of the Division of Reclamation, Mining and Safety (Division/DRMS). Mann Resources LLC, the Operator, was notified about the inspection. The representative for Mann Resources could not attend the scheduled inspection. Steve O'Brian with Environment, Inc., the consultant representing Mann Resources LLC, was present during the inspection. The M & G Pit is located in Adams County approximately 7.5 miles north - northeast of Commerce City Colorado. The M & G Pit is a 70.5 -acre 112c Construction Materials Reclamation Permit. The primary commodity mined at the site was sand and gravel. The permit was issued in August of 1988. The approved post- mining land use is wildlife habitat. The mine site is surrounded by the following land uses: industrial /commercial, residential, agricultural, and mining. During the inspection, the sky was clear and the ground was dry with the exception of the exposed groundwater pond. At the present time it appears that the mining operation has affected the entire permitted site. It appears that no mining activity is occurring, the Operator is in the process of completing reclamation. The Operator has backfilled portions of the exposed groundwater pond. Dumb trucks and a front -end loader were observed during the inspection. The trucks were dumping clean fill dirt along the shoreline and the loader was placing the soil in to the lake. It appears that the pit sees frequent truck traffic to place fill in the exposed groundwater pond. The Operator has also been placing fill along the northern and eastern ends of the affected lands. The fill being placed in the northern and eastern areas is being place to raise the land surface to an elevation desired by the landowner. The elevation desired by the landowner is well above the static groundwater elevation. The Operator is filling the site to this elevation for a future possible land use projects. Backfilling and Gradiniz: The Operator has imported a large volume of inert fill. The Operator has backfilled the majority of the northern and eastern portions of the site to the landowner's desired elevation. The Division believes there is adequate imported material on -site to backfill all of the exposed groundwater to the minimum 2 -feet above static groundwater elevation. Financial Warranty: The current amount of financial warranty the Operator has on deposit with the State is $9,700. Based on the observations made during this inspection and compliance with the Division's April 30, 2010 letter regarding Mining Operations with Exposed Groundwater (enclosed), the cost to reclaim the site was estimated to be $283,455.51 (see attached reclamation cost estimate). The new required financial warranty amount was calculated based on the cost to backfill the pond and seed the site with the approved seed mix. The new required financial warranty is $283,500.00, resulting in a current deficit of financial warranty on deposit with Page 2 of 8