2021-03-05_REVISION - M1977141 - Laserfiche WebLink

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Lyons Quarry �� 112d Reclamation Permit Operations Technical Revision elevations from 5,500 to 7,000 feet above mean sea level. If irrigation is required, an estimated maximum 1.0 total acre feet is projected to establish vegetation with the goal of no watering once plants are established. The water would be pumped from an existing sedimentation pond at a rate of 40 to 80 gallons per minute, depending upon the irrigation system setup, season, and weather conditions. Areas of revegetation will be maintained for up to one growing season to control weed infestation. The sedimentation pond would be utilized during construction for dust control, fill moisture conditioning and watering vegetation as needed. Mining Permit M-1977-141, Technical Revision#2 calls for the 0.3-acre sedimentation pond at the eastern end of the site to be backfilled following all reclamation operations. Grading will blend with surrounding topography and be sloped towards South St. Vrain Creek(Attachment B). BCPOS has expressed interest in leaving the pond in place due to its importance to wildlife including Northern Leopard Frogs and Little Brown Bats, both of which are species of concern for this area. Aggregate Industries will have biologists available to monitor for these species of concern during reclamation activities. Recent correspondence with BCPOS indicates that they do not have augmentation water rights available and to proceed with filling the pond as part of the reclamation. 4 Exhibit F — Reclamation Plan Map The Reclamation Plan Map is provided as Attachment C. 5 Exhibit L — Reclamation Costs Estimated reclamation costs for each of the major work items described below are summarized and presented in Exhibit L— Reclamation Costs, Attachment D. 5. 1 Planned Reclamation Scope of Work The following tasks are specific to the reclamation work to be performed in the Lyons Quarry Area 1 (LQRA1) location and do not include tasks to be performed within the reclamation of the floodplain areas (LQRA2-LQRA5)which are covered in Technical Revision #4. Item 1.0— Mobilization/Demobilization This item includes all costs necessary and incidental to move equipment and supplies onto the project area, perform minimal road improvements, if required, move equipment within the project area during the course of the project, and any other requirements necessary for the successful completion of this project. The operator will maintain such temporary works and equipment throughout the period of construction. This item also includes all labor, equipment, and costs associated with demobilization and clean-up of the project site following the completion of the project. For the scope of work proposed, Aggregate assumes that the following equipment will be mobilized to the site.- 0 (1) Front-end wheel loader with 4.5 CY bucket(Caterpillar 950 or equivalent) • (1) Track-mounted excavator(Caterpillar 349 or equivalent) March 2021 114