2013-08-14_REVISION - M1977436 - Laserfiche WebLink

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Mr. Berhan Keffelew Division of Reclamation, Mining & Safety August 12, 2013 Page 3 AGGREGATE INDUSTRIES area from further reclamation responsibility, the appropriate notice will be filed with the Division. 4) Even though Metro is going to undertake the reclamation of the mitigation areas, the ultimate responsibility for the site is with the Aggregate Industries, the site will not be released until it meets the approved reclamation plan. Please acknowledge. Al acknowledges responsibility for reclamation of the site until the site is reclaimed in accordance with the approved reclamation plan or responsibility for reclamation is transferred to another entity through a Succession of Operator/Transfer of Permit approved by the Division. However, as we discussed with Tony Waldron on February 14, 2013, the goal following approval of the current revision request is to have the subject area completely released from the permit because Metro has included this area in its Army Corps of Engineers 404 permit for mitigation of impacts associated with Metro's over -all Northern Treatment Plant and South Platte Interceptor pipeline project and additional habitat enhancements. Tony acknowledged that requirements associated with the 404 permit would provide adequate assurance of restoration of this area, which includes extensive monitoring and maintenance for a minimum of five years. At Tony's request, this technical revision was submitted to document the changes prior to submittal of the request for release. 5) Attached with the Technical revision is a map labeled as the "Hammer Pit ". Is the Bright Pit now known as the Hammer pit? Please explain. The Brighton Mine was formerly owned and operated by D. H. Holding, Inc. (David W. Hammer) and was commonly known as the Hammer Pit. The map provided with this revision request was prepared by Metro for use with the agreements with Al. Metro refers to the property as the Hammer Pit both in the agreements and in the 404 permit. 6) Please provide a detailed map showing the total lake and wetland areas that will remain in place as part of the post mining land use? The operator stated, "The current revision request further reduces the aerial extent of exposed groundwater with additional backfilling and grading to varied contours ". Does that mean the current water augmentation or water substitute supply plan from the State Engineer will be sufficient to meet their requirements? Please explain. The 4.979 acre Seeding Area shown on the Seeding and Mitigation Area Map submitted with this revision request is associated with Metro's pipeline easements and will be seeded with an upland native grass mix. The 30.884 acre Mitigation Area is the varied contour area that is to be reclaimed to wildlife habitat, seeded with native grasses, shrubland or wetland mix or a combination of those mixes to assure that vegetation appropriate to the final topography/hydrology establishes. A shallow .5 acre or less depression, generally in the southeast area, is expected to establish as an emergent wetland that will only be seasonally