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Permit Amendment - Cemex Sandstone Quarry D -1 Summary of Existing Reclamation Plans The existing Cemex Sandstone Quarry Mining and Reclamation Permit includes plans for reclaiming areas affected by mining. Some of the reclamation strategies in the approved permit will be unaffected by this permit amendment. However, the reclamation strategies have been re- evaluated in this amendment application with the goal of minimizing post - reclamation maintenance of the site and implementing lessons learned from previous reclamation activities conducted at nearby sites. This reclamation plan supersedes prior Sandstone Quarry reclamation plan submittals for all future reclamation activities. Reclamation practices that have been previously approved by the Colorado Division of Reclamation, Mining, and Safety (DRMS) for use at the nearby Cemex Lyons and Dowe Flats Quarry properties include the following: • Regrading to enhance long -term stability, promote reclamation success, and reduce erosion potential; • Installing and maintaining surface water drainage channels to remove water from the affected area in a non - erosive manner; • Striping and stockpiling available topsoil prior to disturbance; • Distributing and spreading topsoil to areas prepared for final reclamation at depths that adequately support the reclamation process; • Incorporating amendments into final cover materials as needed to improve revegetation establishment and growth; and • Revegetating with an ecologically appropriate plant species seed mixture. D -2 Reclamation Goals The reclamation goals for the Cemex Sandstone Quarry have not changed from previous permit documents. The long -term reclamation goal remains to stabilize disturbed areas and create a long -term self- sustaining vegetative cover which promotes ecological succession and stability. Stabilization and revegetation objectives have been, and will continue to be, pursued with the best practical technology for reclamation. Permanent vegetation established on reclaimed lands will support the post- mining land use of wildlife habitat. D -2.1 Target & Surrounding Land Use Primary final land use for the Cemex Sandstone Quarry site will be Wildlife Habitat (WL) defined as grassland and open forest with a mosaic of vegetation communities and wildlife habitats. This land use designation has changed from the previous permit documents which listed Agriculture (Rangeland) as the primary post- mining land use. However, the WL designation is consistent with the current use of the land within the property boundary, outside of the affected area boundary, and master plans of surrounding areas. The land adjacent to the Cemex Sandstone Quarry property on the north, west, and south is primarily open space land owned by either Boulder County Open Space or the City of Lyons. These lands are primarily used for wildlife habitat with limited recreation and grazing activities. The east side of the quarry is bordered by a commercial landscape stone yard. D -3 Reclamation Success Cemex has been performing reclamation and testing various approaches, products, and species for over 15 years on the nearby Lyons and Dowe Flats Quarries (Habitat Management, Inc. 2010). The methods and strategies included in this reclamation plan are based on lessons learned from these past reclamation projects and years of experience. To date, Cemex has completed over 335 acres of final reclamation and 185 acres of interim reclamation. D -3.1 Dowe Flats Quarry Cemex's Dowe Flats Quarry is located two miles northeast of the Sandstone Quarry. Cemex is actively mining this quarry, but concurrent reclamation has been on -going since 1997. To date, 185 acres have been backfilled and reclaimed. Vegetation on the Dowe Flats Quarry reclaimed area is informally monitored Exhibit D D -1 March 2014