2011-03-30_HYDROLOGY - M1978056 (2)

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?F. indicate a 1.79 AF/acre consumptive use rate. Therefore, applicant is entitled to 1034 AF of dry-up credits for the pond. To fully meet the demand of 20.08 AF/yr, applicant is requiiw to dry up an additional 5.22 acres when the mine is in operation. Upon completion of gravel extraction, the amount of additional dry-up necessary is 3.61 acres. Associated with the dry-up is the amount of water necessary to be.dedicated from the Griffmg No. 1 Ditch priorities to the plan of augmentation.. The ditch historically used 5 priorities to serve 80 acres of land. Therefore, the amount of water to be transferred from the headgate diversion is as follows: A d Priority AQM _ffs- Sf."L 39 9.9/80 x 2.0 = .248 44 9.9/80 x 1.0 = .124 208 9.9/80 x 8.0 = .992 212 9.9/80 x 4.0 = .496 287 9.9/80 x 7.75=,251 Total 2.821 cfs During the non-irrigation season, depletions affecting downstream rights will be offset by pumping water from Seashore Pond Well directly to Tomichi Creek. 6 Recommend the court grant a conditional underground water right to Seahorse Pond Well of 17.2 AF 6 (volumetric total of annual evaporation) for mining, recreation, industrial, piscatorial, and wildlife beneficial use(s). Further recommend the court approve the plan for augmentation upon inclusion of the following terms and conditions: 1 1. Applicant provide a detailed topographic map that describes the location of dried up lands. 2. Applicant install a measuring device to quantify the amount and timing of water used in ground mining operations. 3. Applicant complete an accounting schedule and submit an annual report to this office by November 151 for each year of mining operations. 4. Colorado Revised Statute 37-92-305(8) language be incorporated to ensure protection of senior vested water rights. e a Kenneth W. Knox Date Division Engineer 1 i KWK jk -- 1 1 1 1':