Laserfiche WebLink
EXHIBIT D - MINING PLAN <br /> This information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.4 of <br /> the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: <br /> (a) Description of the method(s) of mining to be employed in each stage of the <br /> operation as related to any surface disturbance on affected lands; <br /> The proposed permit area includes a significant deposit of sand and gravel located in the <br /> alluvium of the Arkansas River in Pueblo County. The site is on the east side of Baxter Road, <br /> approximately%of a mile south of U.S. Highway 50. It encompasses 543.5 acres+/-and will <br /> consist of two lined cells and an unlined cell that will serve as a fresh water source <br /> (Thunderbird Lake) and siltation ponds. Lined cells may be lined with slurry walls, clay liners, <br /> or a combination thereof. <br /> Site Preparation: <br /> Initial disturbance of the property will include: stripping overburden to establish the plant <br /> footprint. Concurrently with establishing the plant, the first phase of the Siltation Pond will be <br /> stripped of overburden and mining will commence in these phases once the plant has been <br /> established. <br /> After the initial preparation of the Plant, Fresh Water Pond and Siltation Pond, customer roads <br /> will be established from the entrance to the plant areas. A parking area for employees will be <br /> constructed adjacent to the plant area. <br /> Mining: <br /> Conventional heavy-duty equipment will be used to strip the topsoil and overburden material <br /> from a given phase. Stripped material will be placed in stockpiles either to visually screen the <br /> plant or in areas of the site that are not within the floodway. Any excess material not needed <br /> for reclamation may be sold or hauled off-site during the life of the mine. There will be no <br /> mining below the groundwater table until an approved Substitute Water Supply Plan (SWSP) <br /> has been obtained or cell lining is complete. <br /> Each lined phase will be dewatered and dry-mined using scrapers, bulldozers, front-end <br /> loaders, excavators, or similar equipment. The Fresh Water and Siltation Ponds will be <br /> unlined and wet mined with excavators. <br /> Mining at the site will progress in three (3) major stages. A map depicting the phases can be <br /> found in Exhibit C-2. <br /> Phase 1-Phase 1 is the site development phase during which the operator will establish the <br /> Aggregate Plant, the Siltation Pond, and the Freshwater Pond. These areas, excluding the <br /> Aggregate Plant, will be wet mined with excavators. Phase 1 is anticipated to last <br /> approximately 1 year, but will vary depending on market demands for aggregate. <br /> Topsoil mined from phase 1 will be segregated and utilized to establish visual screening- <br /> berms along Baxter Road (where not encumbered by the floodway) and on the north part of <br /> the site near the neighboring properties. Overburden may be used to complete construction of <br /> the visual berms if there is not enough topsoil available. After the berms have been <br /> established, any remaining top soil and/or overburden may be stockpiled north of or on the <br /> Martin Marietta Materials—Thunderbird Sand and Gravel—MLRB 112 Permit Application <br /> Exhibit D- 1 <br />