2020-04-10_HYDROLOGY - M1985218 - Laserfiche WebLink

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David Heintz April 10, 2020 Page 3 of 5 lease of 33 acre-feet with AGUA will provide sufficient replacement water for the calculated depletions of 22.76 acre-feet at the Rich Pit from December through March of the plan year. In accordance with the letter dated April 30, 2010 from the Colorado Division of Reclamation, Mining, and Safety ("DRMS"), a source of renewable long-term replacement water sufficient to cover evaporative depletions has not been secured for this plan. At this time, Martin Marietta plans to proceed with the option to mitigate long-term injurious stream depletions that result from mining-related exposure of ground water according to the original plan submitted by LaFarge to install a slurry wall liner for use as water storage for lining and/or backfilling the pit. The Rich Pit has a bond totaling $344,500 to cover the cost of the remediation (Bond No. 44284559). CONDITIONS OF APPROVAL I hereby approve the proposed SWSP in accordance with 537-90-137(11), C.R.S., subject to the following conditions: 1. This current plan shall be valid April 1, 2020 through March 31, 2021 unless otherwise revoked or superseded by decree. If this plan will not be decreed by a water court action by the plan's expiration date, a renewal request must be submitted to this office and the Division 2 office (please copy Kathy Trask at Kathy.TraskCstate.co.us) with the statutory fee (currently $257) no later than February 1, 2021. 2. A well permit was obtained for the current use and exposed pond surface area of the gravel pit in accordance with 537-90-137(2) and (11), C.R.S., permit no. 45995-F, and this permit remains valid. 3. The exposed ground water surface areas, consumption of water, and river depletions due to the operation of this plan may not exceed those listed in Tables 1, 2, and 3, unless a new application is submitted to this office. Documentation of pond size may be required by the Division Engineer in the form of an aerial photo evaluation or survey by a Professional Land Surveyor during the plan year, or in years covered by subsequent renewals of this plan. 4. The total amount of product mined at the Rich Pit shall not exceed 360,000 tons per year, which results in 5.30 acre-feet of water lost with product and 5.30 acre-feet of water lost to washing. 5. Well Permit No. 66042-F (WDID 1405128) shall not pump more than 0.333 acre-foot during the approval period, unless a new SWSP is approved allowing such. 6. All releases of replacement water must be sufficient to cover depletions as given on the attached tables and as calculated monthly based on pumping of Well Permit No. 66042-F (WDID 1405128) and made under the direction and/or approval of the Division Engineer and District 14 Water Commissioner. 7. Colorado Springs Utilities can either make replacements for this plan by releasing water from Pueblo Reservoir or utilizing flows that are not able to be exchanged into Pueblo Reservoir. The applicant must coordinate with CSU when the replacement source is not a direct release from Pueblo Reservoir.