TECHNICAL MEMORANDUM To File ZORRO RANCHMELLFIELD June 6, 2014 C From Casey W. Cook, P.E. Subject ZORRO RANCH WELL 6 TESTING Introduction In early 2014, Zorro Ranch reactivated Well 6, which had been mostly unused since the early 2000s. Figure 1 shows the location of the well. We understand the well was reactivated to make up for lost capacity from the Dakota well, which is out of service with a dropped pump. In reviewing whether Well 6 is suitable to make up for lost Dakota capacity, Balleau Groundwater Inc., (BGW) recommended' that the Ranch rehabilitate and test Well 6 to determine the capacity and sustainable yield. In May 2014, Rodgers and Co. pulled the pump 6 and rehabilitated the well, then installed a temporary pump for testing. The Ranch authorized BGW to coordinate the testing and to report on well capacity and long-term yield. This technical memorandum provides a documentation of Well 6 rehabilitation and testing, projects the well capacity and yield, and recommends a pump capacity. We find the well to be capable of 15 gpm pumping for 10 hours a day, for diversions of up to 10 acre feet per year for several years. Ongoing regional water level declines and self-induced drawdown eventually will reduce well yield to less than 10 AFY with fewer hours of pumping or a lesser pumping rate. Background Well 6 was drilled in 1994 under OSE File No. E-5902, and later renumbered E-6478-S. The well is 215 feet deep and is completed with 6-inch PVC casing with perforations from 100 to 120 and 175 to 215 feet. The drillers log (attached) suggests the well is completed in basin fill alluvium with the primary water-bearing zone identified as a gravel between 172 and 196 ft deep. The basin fill is the primary aquifer of the Estancia Basin. Static water level in 1995 was 87 feet, and is 117 ft today. The 30-foot Electronic Communication from Casey W. Cook, P.E., of Balleau Groundwater, Inc. to Mr. Brice M. Gordon of Zorro Ranch, March 6, 2014 We