PERMFILE55140 - Laserfiche WebLink

Home Browse Search

_ Larenciro Canvort Mine - Graendwmer Techmeof Reoart • Aquifer Characteristics Aquifer and water-bearing zone characteristics were determined from literature and specific field studies. During monitoring events, each well was gauged for depth to water and these depths recorded. For each horizon, surveyed well elevations were utilized to establish the elevation of the groundwater in the well to sea level datum. These elevations were plotted and the groundwater gradient established for each of the horizons. In addition to the establishment of the gradients within the area, each horizon was tested for aquifer parameters. Testing of the wells was conducted by slug testing. The alluvial wells were tested by first emplacing an In-Situ pressure transducer in the well and allowing the well to equilibrate. This transducer was connected to an In-Situ model 2000 Hermit datalogger for test data recording. Test data was recorded in a logarithmic fashion allowing for greater data gathering during the early part of the test procedure. Following the input of transducer calibration values into the Hermit, a "slug" of water was removed from the well with a 3 inch bailer. Concurrent with the slug removal, the data recording was initiated. Data from these "slug-out" tests were analyzed utilizing AQTESOLV, an aquifer test solver computer program. All alluvial well data was analyzed via the Bouwer and Rice methodology for unconfined aquifers. • Testing in the consolidated rock was also performed via slug testing. These wells were tested by the "slug-in" method since all water-bearing zones encountered by these wells were considered confined or semi-confined. Test was performed in a similar fashion to the alluvial wells except the slug was introduced into the well instead of being removed. This has the effect of adding static head to the well. The datalogger measures the subsequent falling head in the well. These test were also analyzed utilizing AQTESOLV, but utilizing the method of Cooper and Pappadapolous. Developed Groundwater Resources and Water Rights Water resources and water rights were researched through both the State Engineer's Office and field studies. In addition, field studies were performed via land and air searches for additional water uses at the property. All items spotted from aerial surveys were confirmed by ground surveys prior to transfer to the master hydrology map. SECTION 3 -RESULTS AND DISCUSSION Literature Review/Overview Raton Formation Within the permit area two formations outcrop, the Raton and Poison Canyon (Figure GW-1). Further discussion of geology can be found in the geology section of the permit. The Vermejo and Groundwater.475\Dec<mber 9. 1996 9