2014-02-20_HYDROLOGY - M1984094 - Laserfiche WebLink

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Gloria Z Pit SWSP Page 3 of 5 February 18, 2014 • Alluvial aquifer width (W) = 23,440 feet • Specific yield (S) = 0.10 • Transmissivity (T) = 60 gallons per day per foot Lagged depletions resulting from past (2013) and projected use of ground water at the site are estimated total 0.89 acre -feet during this plan period, as shown in the attached Table 4. Replacements A lease of 1 acre -foot of fully consumable water provided by HASP will be used to make replacements (copy attached). The current lease is valid until October 1, 2014; therefore this SWSP shall expire on October 1, 2014 unless an additional lease valid through October 31, 2014 is obtained and provided to this office. The lease agreement specifies the primary source of augmentation water as water stored in Spinney Mountain Reservoir. However, the lease agreement states that HASP may substitute any source of water it has available with approval of the division engineer. If water other than fully consumable water decreed for augmentation use, and stored in Spinney Mountain Reservoir, is used for replacement purposes under this SWSP such releases must be coordinated with the water commissioner to assure that such source is adequate to replace depletions in time, location and amount. According to the lease, HASP may not always be able to deliver water to, or exchange water to, the point of depletion on the Middle Fork of the South Platte River as a result of stream flow conditions. Should HASP be unable to deliver or exchange water to the point of depletion, the Applicant must notify the water commissioner as soon as possible and describe how such depletions will be replaced. The attached Table 5 shows the monthly projected depletions and schedule of replacements for this plan period. Long Term Augmentation In accordance with the letter dated April 30, 2010 from the Colorado Division of Reclamation, Mining, and Safety ( "DRMS "), all sand and gravel mining operators must comply with the requirements of the Colorado Reclamation Act and the Mineral Rules and Regulations for the protection of water resources. The April 30, 2010 letter from DRMS (copy attached) requires that you provide information to DRMS to demonstrate you can replace long term injurious stream depletions that result from mining related exposure of ground water. Upon completion of mining operations and reclamation, there will be no permanent water exposure and the site will be reclaimed to rangeland. In accordance with approach number 3, a total bond amount of $78,218, which includes the cost of backfilling the ponds, has been set by DRMS and obtained by the Applicant. Conditions of Approval I hereby approve the proposed SWSP in accordance with § 37 -90- 137(11), C.R.S., subject to the following conditions: This SWSP is approved with the effective date of November 1, 2013 and shall be valid through October 1, 2014 unless otherwise revoked or modified. The expiration date may be extended to October 31, 2014 if an additional lease of replacement water is obtained and provided to this office prior to October 1, 2014, and such lease is valid through October 31, 2014. If