2014-11-14_REVISION - M1977302 - Laserfiche WebLink

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1. The Division received comments from the Colorado Historical Society and Colorado Division of Water Resources. The letters are attached for your review. Please address the comments noted in the letters and make any changes in the application as necessary. PLS Response: Letter from the Colorado Historical Society, regarding Notice of 112 Construction Materials Reclamation Permit Amendment Application Consideration Pete Lien &Sons,Inc. Owl Canyon Quarry Permit No. M-1977-302 (SHPO Project#66356) requests that should human remains be discovered during the proposed project activities, the requirements under State Law C.R.S. 24-80(part 13) apply and must be followed. PLS will comply with these required laws should the findings as described be encountered. The response letter from the Colorado Division of Water Resources provided two conditions for approval. The first states that exposure to ground water must not occur during or after mining operations. PLS does not anticipate exposing groundwater and will comply with this condition. The second condition requires that the groundwater well(WDID 030878,Permit No. 78348-F) is to only be operated if a substitute water supply plan has been approved by the State Engineer or a plan for augmentation approved by the water court. PLS is currently operating under an approved SWSP that was approved by the Division of Water Resources on August 7, 2014 and covers operations through July 31, 2015. PLS will seek to renew the SWSP for this well when the well is to be used beyond the July 31, 2015 timeframe. 6.4.3 Exhibit C—Pre-Mining and Mining Plan Map(s)of Affected Land 2. As required by rule 6.4.3(c),the Mining Plan Map must show the existing topography of the area with contour lines of sufficient detail to portray direction and rate of slope. The map which was submitted for Exhibit C portrays original contours of the area. The map should depict the site as it currently exists, including all areas of excavation,highwall, and backfilled areas. The Operator may consider using a larger map scale to portray the necessary detail. Please revise the Mining Plan Map accordingly. PLS Response: Please refer to the Mining Annual Report for the 2014 reporting year submitted earlier this year. The map in this report depicts the most up to date conditions for general locations, which include all areas of excavation, highwall, backfill, and reclamation. A new Exhibit C-1 (Current Conditions)site map is enclosed to portray contours of the active mining areas. Backfilling is currently estimated in mining areas A-1 (BF-II at 95%,A-2(BF-III,IV,19 at 65%,A-3(BF-VI) at 50%, and active mining in A-4(BF-VIII) at 0%. In general there is a 15 to 17% downslope to the mining highwall with approximately 50 to 70'height from quarry floor to the top of highwall. 3. The Mining Plan Map shows the old railroad line which is no longer present on the site. Please remove the railroad from the map or add a note which indicates that the railroad symbol indicates the former location of the railroad. PLS Response: Please refer to the attached revised Mining Plan Map (Exhibit C).A note has been added to the maps stating that the old railroad line is no longer present on the site and is shown as part of the historical topography as the pre-mining conditions on the affected land.