2002-11-25_REVISION - M1977344 (2)

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Exhibit G -Water Information 26. What is the elevation of the water table in the azea of mining cuts 3 - 18? Given the information reported in Table G-1 and the fact that Holcim proposes to divert and mine a portion of the channel in this azea, even shallower ground water expressing itself as surface water can be anticipated. How does Holcim plan to address the wafer which will more than Likely be impounded at Power elevations, during mining and reclamation? 27. In accordance with Rule 6 Section 4.7(2)(c), submit a brief statement or plan showing how water from runoff from disturbed azeas, piled material and operating surfaces wID be managed to protect against pollution of either surface or groundwater and, where applicable, control pollution in a manner that is consistent with water quality dischazge permits during and afrer the operation. 28. Has Holcim applied for or acquired a National Pollutant Discharge Elimination System (NPDES) permit from the Water Quality Control Division of the Colorado Department of Health and Environment for dischazges to Beaz Creek or the Arkansas River that may result from the mining operations in the Beaz Creek drainage mining area? 29. In reviewing a Department of the Army Evaluation and Decision Document regarding your application for a 404 pertrut [o relocate Beaz Creek, it was noticed that Holcim may have plans to pump water from the Beaz Creek mine azea and return i[ to the Arkansas River. We assume that the water would be returned via lower Beaz Creek. This is water that currently enters Beaz Creek (between one and two cubic feet per second) in the middle and lower sections of the channel and seeps into the mine azea. Please provide a thorough discussion of the hydrologic impacts that mining the Bear Creek drainage azea will have on the water that presently seeps into Beaz Creek in the that azea. Include in your discussion whether this water wiB become groundwater when backfilling of mined azeas occurs If it will become groundwater, which the Division assumes it will,-address this exhibit for sections 4.7(2)(b) sad (c) and 4.7{5). Pumping groundwater most likely would require a permit from the State Engineers Office. Please check with that office to determine whether one is required and address the need in this exhibit and in Exhibit M. Also, dischazging pumped water to lower Beaz Creek or [o [he Arkansas River would most likely result in a requirement for changes to your NPEDS permit. Address such a requirement in this exhibit and in Exhibit M. 30. The Office of the State Engineer, Division of Water Resources provided the following comment regazding the diversion of Bear Creek. "The applicant has listed that up to 0.25 cfs of water will be diverted from Beaz Creek for the creation of a wetlands. Diversion of water in over appropriated azeas, such as this, requires a plan for augmentation or substitute water supply plan." Please contact the Division of Water Resources, Division 2 Office and inquire about the need for an augmentation plan or substitute water supply plan. If either is needed, provide that information in this exhibit as well as Exhibit M. 31. Your application includes plans to divert Beaz Creek. Our engineer has conducted an initial review of those plans and needs more information to complete his review. Please address his questions and requests in the following list. a. The operator should submit a compaction plan for the fill sections and berm segments of the re-alignment. Also, lifr thickness information should be included. b. How does the operator plan to key-in the layers of material in the fill and berm azeas? c. Describe how the clay-lined portion of the channel will be constructed (lift thickness, compaction method, etc).