2002-06-28_REVISION - M1983033 - Laserfiche WebLink

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"Lake Albert" to be used primarily to store water for operational needs and provide 310 acre-feet of water storage during final reclamation. The applicant has also proposed 23.57 acre "Frei Lake" to be used as a water storage reservoir with 1200 acre-feet of water storage. As a part of this amendment application, the applicant will need to demonstrate the suitability of each hard rock excavation area for future water storage, ie: provide a survey of each area indicating the presence of cracks or fissures and the need for a seal or liner to assure adequate water holding capacity. In the even[ that a liner is needed for either or both facilities, the applicant will need to provide a copy of the State Engineer's Office (SEO's) letter approving the proposed liner design and a copy of the design and specifications prior to the Division's approval of the amendment application. The Division would also require an adequate bond to assure the installation of each reservoir. The applicant would have the option to bond for 100 percent installation or replacement cost of a pit liner or may select a regulated construction option and become eligible fora 20 percent installation or replacement bond. (See attached specification guide for specific information required for each option). In the event that the applicant is not prepared to submit such information at this time, the Division advises the applicant to remove the intentions for a lake and/or reservoir from this amendment application. The operator may submit such information at a later date as a modification to the permit. Please respond with your intentions to either proceed with plans and bonding for each facility or to remove the proposed plans from the amendment application at this time. 3. During a previous site inspection by the Division on April 8, 2002 the Division noted a south facing highwall with approximate dimensions of 679' x 270' x 45 degrees. This highwall appears to be part of the buffer area between the I-70 Corridor and the north face of the quarry. Please respond with whether this face has already been deemed stable by Revey Associates or by the Division, or whether the operator has any future plans for reclamation of the south face. 6.4.7 EXHIBIT G -Water Information 4. Representatives of the Colorado Division of Wildlife have expressed a concern of minimizing siltation into nearby Clear Creek from disturbances at the Quarry. The applicant mentions on page 32 that a Storm Water Management Plan (SWMP) has been prepared for [his pit. In conformance with Rule 6.4.7(2)(c) please provide a discussion and diagram showing how runoff waters from all affected lands will be managed to protect against pollution of surface water, particulazly Clear Creek. As part of your response, you may include any drainage control studies and/or Best Management Practices (BMP's) for the existing and planned disturbances at the Walstrum Quarry. 6.4.12 EXHIBIT L -Reclamation Costs 5. In conformance with Rule 6.4.12(1) the reclamation cost estimate will need to include the cost to reclaim the maximum number of linear feet of exposed highwall and acreage of disturbance expected at any one time as request in Item 1 above. Specific items already listed on page 31 that will need to be revised include the following: 1) Total cost for recoiling will be based on a unit cos[ of $0.60/cy rather than $0.16/cy, and 2) Grading and shaping the mine floor will be based on 20 acre-feet of grading to be completed. Other costs that will need [o be included are as follows: Demobilization (should be same as cost for mobilization; $3,465) Demolition of 30 slabs of reinforced concrete with dimensions of 1' x 3' x 10' each Grading & seeding of planting berm along Cleaz Creek, ie: 8' x 4' x 750' Phase Z will need to be topsoiled & seeded, or change post-mining land use to commercial use