Laserfiche WebLink
EXHIBIT D <br />Mining Plan <br />The City of Greeley proposes to re-mine the 25'n Avenue site in Weld County, Colorado. The <br />City of Greeley lies approximately 1-'/~ miles south and east of the property. The site is to the <br />south of the Cache la Poudre River and hetween North 25"'Avenue and North 35`h Avenue. <br />This site was previously owned by Flatiron Companies and mined by Lafarge and is part of a <br />larger active mine site (M-1977-081). Greeley has purchased a portion of the mine site known as <br />the 25`h Avenue Site (Parcel A) to further develop as lined water storage. The site currently <br />consists of two partially reclaimed groundwater ponds and a perimeter access road. Western <br />Mobile Inc., dba Lafarge NA, will be asking for release on this parcel concurrent with this permit <br />application. <br />The site is bounded by the 35`h Avenue Drainage Ditch on the west side, a partially reclaimed <br />mining excavation on the western half of the south side, and by active gravel mining operation <br />areas (stockpiles and dewatering ditch) alon~ the eastern half of the south side and along the east <br />side operated by Lafarge. To the west of 35` Avenue is another active Lafarge operation. <br />Previous mining extended to a depth of approximately 25 to 30 feet. The pits were dewatered <br />during mining. Mining operations did not remove all of the resources, which extends to a <br />maximum depth of approximately 60 feet. This application proposes to line this site with a <br />slurry wall and remove the majority of the remaining sand and gravel to allow for greater water <br />storage capacity. <br />Sand and gravel will be the primary product produced from the 25'h Avenue site. The principal <br />intended use for the sand and gravel is for construction aggregates. Permitted mining operations <br />are located to the east and west of the proposed site. The dominant non-mining land use <br />surrounding the property is agriculture and industrial. <br />Borehole drilling and testing has verified that the 25`h Avenue site still contains a significant <br />commercial deposit of sand and gravel. The depth of the topsoil and overburden averaged <br />approximately 3.0 feet over the entire site. As this site was previously mined, there is very little <br />overburden material on site. The majority of material used to reclaim the exterior mining slopes <br />was pushed up from the bottom of the pits and is a mix of ciay, sand and small aggregates. The <br />total depth of the aggregate material averages approximately 60 feet, but due to previous mining, <br />there is approximately a 30 to 35 foot depth of remaining resource. <br />The permit boundary will encompass approximately 89.16 acres with approximately 46 acres <br />being mined in the center of the site. The remaining area will consist of setbacks and access <br />road. <br />ISM' Avenue Sipe <br />DMG I /7 Permit <br />Page 4 <br />