2012-01-24_PERMIT FILE - M2011054 (4)

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2. The applicant should be aware that Rule 3.1.6 (1) of the Construction Material Rules and Regulations require that disturbances to the prevailing hydrologic balance of the affected land and to the surrounding area and to the quantity and quality of water in surface and groundwater systems both during and after the mining operation and during reclamation shall be minimized. In that the proposed operation includes dewatering of the pits, the potential for impacts to groundwater exists. Please indicate how the hydrologic balance of groundwater in and around the permit site will be monitored. A monitoring and mitigation plan is attached to this letter. 3. Please clarify where water from the mine will be discharged and provide a signed affidavit that the operator has consent to discharge water into the proposed water conveying structure. As shown on Exhibit C -2, the dewatering discharge point is in the extreme northwest corner of the permit area. The discharge will enter the Larkin tailwater ditch and flow to the Colorado River. Concerning the Larkin ditch, we believe the ditch has been abandoned. As we informed the Division previously, we can not find the Larkin Ditch Co. The landowners can not remember any use of the ditch (they previously operated a campground on the property). The landowner, Laurent and BJ Jacquelin, own all the land from the permit area to the Colorado River. Therefore they own the land over which the ditch flows. 4. Per Rule 6.4.4(f) (ii), please identify the nature of the stratum that lies immediately beneath the deposit to be mined. It is stated that the underlying stratum is shale bedrock. Please specify the type of shale that exists beneath the proposed operation. The sand and gravel deposit is underlain by the Tertiary Aged Atwell Gulch Member of the Wasatch Formation. The upper part of this formation is composed predominately of yellowish -gray, yellowish- brown, and black mudstone or claystone and commonly contains carbonaceous shale or mudstone and some coal locally. 5. Please supply the Division a copy of the well permit or well permit number of the well permit obtained for the proposed mining operation. Oldcastle is in the process of applying for a gravel pit well permit. A copy of the permit will be forwarded to the Division when it is approved. Ground water will not be exposed until the gravel pit well permit and the substitute water supply plan (SWSP) have been approved. Wright Water Engineers is working on the SWSP which includes the purchase of augmentation water from West Divide Water Conservation District. 6. Regarding topsoil replacement, the reclamation plan states that only 4 inches of topsoil will be provided as a plant growth medium. Per Rule 6.4.5(1),