_REVISION - M1973021 (3) - Laserfiche WebLink

Home Browse Search

Aggregate Industries, Morrison Quarry Amendment No. 7 to Permit M-1973-021 Morrison, CO October 2021 | 36 including BMPs and dust suppression of working areas during working and non-working periods, including weekends, throughout the duration of the project. Item 4.0 Site Survey This task consists of performing all surveys, measurements, and computations required by the specifications to accurately track that the materials are imported and exported according to the design drawings. Item 5.0 Dewatering To handle stormwater accumulations within the West and South Quarries (below El. 7,000 on the western wall), a horizontal drain will be installed running from the sump location of the South Quarry eastward and daylighting in Unnamed Drainage #3. Dewatering would consist of installing a borehole approximately 700 feet under the eastern wall of the South Quarry. The remainder of the hole would be unlined and drilled at a sufficient diameter capable of handling stormwater flows of a 10-year precipitation event. It is assumed the outlet would be a free-flowing pipe, but if necessary, a wellhead complete with valve control and pressure gauge could be installed to regulate flows from the base of the South Quarry during heavy precipitation events. Item 6.0 Structure Dismantling and Demolition All human-made structures not shown in Exhibit F.1 through Exhibit F.3 will be dismantled, demolished and removed from the site prior to final grading and reclamation. These include, but are not limited to, the following structures: • Processing Area Equipment (conveyors, crushers, etc.) • Mine Administration Offices • Road Base Processing Plant in South Quarry • Fuel Storage Area • Haul Roads and Parking Areas • Truck Wash and Tarping Area on Main Access Road • Dewatering Wells, Communication Towers, and Other Utilities The operator will dismantle, demolish, and/or remove from the property all structures listed above and any additional structures not shown in Exhibit F.1 through Exhibit F.3. All structures must be removed in accordance with the reclamation plans. Concrete foundations and slabs must be removed unless authorized to remain as per the end user request. No debris or re- saleable materials will be permitted to be left on site following final grading. No pipes, rebar, or any other materials are to be left protruding from the ground. Prior to demolition and removal, the physical condition of the property will be evaluated, and features such as hazardous substances and/or petroleum product containers, storage tanks, odors, pools of liquid, drums,