2014-05-09_REVISION - M1998013 - Laserfiche WebLink

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EXHIBIT D — MINING PLAN - UPDATE 5 -2014 This information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.4 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: (a) Description of the method(s) of mining to be employed in each stage of the operation as related to any surface disturbance on affected lands; The proposed permit area includes a significant deposit of sand and gravel located in the alluvium of the Saint Vrain River in Weld County. The site is located north of Weld County Road 24 /Highway 119 and east of Weld County Road 9.75. It encompasses eight parcels totaling approximately 370.1 acres. This Amendment specifically includes approximately 60.3 acres in the southeast comer of Weld County Road 11.25 and Weld County Road 26. Site Preparation: Initial disturbance of the property will include: clearing the site of existing structures (with exception of the structures to remain), constructing the slurry wall, dewatering the site, and stripping the topsoil and overburden material. Mining: After the slurry wall installation, dewatering trenches will be excavated down to bedrock to dewater the portion of the site located within the slurry wall. Groundwater collected in the dewatering trench will be pumped into a settling pond and ultimately discharged to Tri -Town Drainage located on the east end of the property that drains to the Saint Vrain River. Once water levels are controlled through the dewatering system, scrapers will strip the topsoil and overburden material from a given phase and stockpile them separately for use during site reclamation. Any excess material not needed for reclamation may be sold or hauled off -site during the life of the mine. The sand and gravel material will be excavated down to bedrock. Each phase will be dry-mined using scrapers, bulldozers, front -end loaders, excavators, or similar equipment. The mining on this site will progress in two phases, ranging in size from 21 -22 acres and proceeding from east to the west. The operator will develop and comply with a Stormwater Management Plan and Spill, Prevention, Control and Countermeasures Plan. The operator will notify the Division of Mine Safety and Reclamation in the event of a reportable spill. Processing: All material mined under this proposed application will be transported by conveyor or haul truck to the processing area. Import Material: Bestway Concrete & Aggregates may import material from and export material to other sites. The applicant is aware that in accordance with Rule 3.1.5(9) of the Construction Bestway Concrete & Aggregates —The Shores -Burch Property — MLRB 112 Permit Application Exhibit D -1