Water Well Journal
Issue link: http://read.dmtmag.com/i/440561
Conclusions This well rehabilitation effort resulted from a failure to take the groundwater chemistry into account when the original well was designed. Because of this oversight, a well that should have seen more than 20 years of service had to be either replaced or rehabilitated after only seven years of use due to corrosion. The use of glass beads as a filter medium is not yet wide- spread in the United States, but the combination of rapid installation, reduced development time, and the high specific capacity of the rehabilitated well are solid confirmation the proper product was selected. Total costs for this rehabilitation were about 20% of the cost of a new well, representing a savings of several thousand dollars. Twitter @WaterWellJournl Robert M. St. Louis, B.S., M.Sc., is a hydrogeologist currently responsi- ble for Newmont Mining Corp.'s Carlin Trend dewatering and hydro- geology groups. He has experience in the water well drilling industry as well as mine hydrogeology, dewatering, and water supply. He can be reached at bob.st.louis@newmont.com. Jofree Duran, B.S., is a geotechnical engineer and hydrogeologist currently responsible for Newmont Mining Corp.'s Phoenix Mine geo- technical and hydrogeology programs. He has more than 25 years of experience in mine planning, rock mechanics, and pit slope stability. He can be reached at jofree.duran@newmont.com. WWJ January 2015 27 DACUM Codes To help meet your professional needs, this article covers skills and competencies found in DACUM charts for drillers and pump installers. DO refers to the drilling chart. The letter and number immediately following is the skill on the chart covered by the article. This article covers: DOB-1, DOB-2, DOB-3, DOE-10, DOF-1, DOF-2, DOF-6, DOL-11 More information on DACUM and the charts are available at www.NGWA.org. WWJ Figure 4. As-built diagrams of the well as originally constructed and after rehabilitation.