2003-03-31_REVISION - M1977344 (2)

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Division of Minerals and Geology March 31, 2003 Page 6 of I7 future tests regarding the utilization of this material. Translime, the bottom 10 feet of the Smokey Hill Limestone Group, and the Fort Hays Limestone (full face) will be used for production requirements as well as the top 15 feet of the Codell sandstone. (See Figure C- 4: Quarry Cross Sections.) Item No. 12 DMG: Provide your plan to prevent damage (due to blasting) to the natural gas pipeline running through extraction cuts 13, 14, 16 and 18. Response: The natural gas line is shown on Figure C-10 -New and Existing Facilities. With respect to Cuts 13, 14, 16, and 18, it is planned that the quarry will be operating in the vicinity of the pipeline by year 2022. It is planned that prior to 2022, Holcim will negotiate with the natural gas company to relocate the gas line to another area where it will not be impacted by blasting and other quarrying activities. If Holcim will be mining at a distance that is Iess than 500 feet to the natural gas pipeline, seismic monitors will be installed to monitor ground vibrations due to blasting in the immediate area. Exhibit E-Reclamation Plan Item No. 13 DMG: Rule 6 Section 4. S (2) (c) requires a description of how the reclamation plan will be implemented to meet each applicable requirement of Rule 3 Section 1. Your application states that 'illl applicable requirements ofSectime 3.1 of the rules are addressed elsewhere in this application. " The applicable requirements must be addressed in Exhibit E. Response: Please see the revised Exhibit E: Reclamation Plan, attached. Item No. 14 DMG: Rule 3 Section 1.5 (1) states that grading shall be carried on so as to create final topography appropriate to the ftnaZ land use. Your application's mining plan states that the pit will be backfilled by dumping overburden from trucks leaving a slope at the edge of the backfill of approximately 1.3h:1 v. That slope is not appropriate to the final land use of rangeland. It is too steep to be traversed by livestock (see Rule 3.1.10 (3)). The 1.3:1 slope is too steep to successfully revegetate and prevent excessive erosion and siltation. The presently approved reclamation slope for this permit is 3: 1. It is Division policy not to approve, in a modification to a permit, reclamation measures that are not as adequate as those approved for the original permit. If Holcim wants to propose steeper slopes, your proposed reclamation plan must demonstrate to the Division that Holcim will be able to permanently stabilize and re-vegetate the slopes successfully to rangeland. Holcim Response to Amendment Adequacy Review.doc