2015-01-12_HYDROLOGY - M1978052 - Laserfiche WebLink

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Mr. David M. Heintz Page 5 of 8 MMM South Platte Combined Replacement Plan January 8, 2015 MMM has posted a bond to cover the cost of backfilling or lining in accordance with approach # 1 and # 3 of the DRMS letter. As this site will include unlined ponds that will permanently exposed ground water, an application to the water court for a plan of augmentation to cover the long term depletions from the site must be filed at least three years prior to the completion of mining. A summary of the final reclamation plans and the approach to replace long term injurious stream depletions are shown in Table E. TABLE E - FINAL RECLAMATION SUMMARY Proposed Final Bond Site Name _ Reclamation _ Amount Comments Howe Pit Line Reservoirs n/a Denver Water is permittee and bonds are not required of municipal entities. Riverbend East Lined Reservoirs n/a Denver Water is permittee and bonds are not required of municipal entities. Bond includes amounts to cover lining Lined Reservoirs and backfilling of the old Fort Lupton Riverbend West and unlined ponds $3,450,600 Pit. Will need augmentation plan filed in court at least three years prior to the completion of mining. Conditions of Approval I hereby approve this substitute water supply plan, in accordance with Section 37-90-137(11), C.R.S., subject to the following conditions: 1. This SWSP shall be valid for the period of November 1, 2014 through October 31, 2015, unless otherwise revoked, modified, or superceded by decree. If this plan will not be made absolute by a water court action by the plan's expiration date, a renewal request must be submitted to this office with the statutory fee (currently $257 per site) by September 15, 2015. 2. The total area of pond surface exposed at the Riverbend West and Riverbend East after December 31, 1980 for each of the unlined pits shall not exceed those values listed in Table A of this approval. Should the total surface area exposed exceed those amounts, an amendment will need to be filed with this office. The total lagged depletions resulting from operation of the pits shall not exceed those amounts specified in attached Table 5. Should the lagged depletion from any of the pits exceed the values listed in Table 5, an amendment will need to be filed with this office. 3. Well permit no. 55577-F was originally issued for DRMS File No. M-1985-088 for approximately 70 acres. DRMS File No. M-2000-006 subsequently encompassed M-1985-088 and now covers approximately 1,250 acres. Prior to any groundwater exposure outside of the original 70 acres well permit no. 55577-F covers, and new well permit will need to be applied for and a new 600-ft spacing evaluation must be done. The applicant does not anticipate any ground water exposure beyond the old M-1985-088 permit boundary and thus a new permit is not required to be obtained for this SWSP to be valid.