2011-03-17_INSPECTION - M2002020

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PERMIT #: M-2002-020 INSPECTOR'S INITIALS: PSH INSPECTION DATE: March 15, 2011 Survey flags and paint were observed delineating the fence location. The 25th Avenue Site is an 112c sand and gravel operation, permitted for 89.16 acres of total disturbance. The permit was issued on May 30, 2002. No permit revisions have occurred at the site. The site was previously owned by Flatiron Companies and mined by Lafarge as part of a larger mine site. The previous mining activities extended to a depth of approximately 25 to 30 feet and created two open water ponds separated by a berm. The City of Greeley (Greeley) purchased the site to develop it as a lined water storage facility. Lafarge contract mined the site for Greeley and completed mining the berm between the lakes in 2004, creating one lined pond. Lafarge opted to not remove additional material from the bottom of the lake. The site was inactive during the inspection. No topsoil stockpiles remain at the site. A pile of waste or overburden material was observed in the northeast corner of the site. Greeley intends to continue mining the site down to bedrock (approximately 60 feet) in the future. The immediate plans are to use the pond for fishing as part of the "Fishing is Fun" program. The Greeley parks department has constructed two gazebos at the site (northeast and southwest corners of the pond) and plans to create fish habitats with logs and build paths around the lake. The site is schedule to open for fishing on June 4, 2011. The approved post mine land use for the site is developed water resource. Construction of a slurry wall was completed in 2002 and approved by the State Engineer's Office in 2003. The centerline of the slurry wall was marked by rebar at the time of the inspection. The inlet and outlet structures were completed in 2005. An approved final augmentation plan has been issued for the site. Overall, the site appeared stable and well maintained. No erosion features were observed. Vegetation was well established on the north and south sides of the pond. The west side of the pond contained vegetation and annual weeds and the east side as sparsely vegetated. The Division recommends paths for fishing access be established to prevent determination of the established vegetation by foot traffic. The Operator will be required to meet the revegetation standards prior to full release of the site, which might require re-seeding area affected by the fishing activities. No noxious weeds were identified during the inspection. Inspection Contact Address Suzanne Bassinger City of Greeley 1100 10th St., Suite 300 Greeley, CO 80631 Cc: Tony Waldron, Division Page 2 of 4