Tuesday, June 24, 2008 : 4:00 p.m.

An Overview of Recent Well Performance Research

Jim Bailey, RG, Kleinfelder Inc.

The long term operation of a well or well field requires regular performance monitoring and periodic maintenance.   This presentation will highlight the findings of some interesting recent studies related to declining well performance and rehabilitation. The studies include several from the Netherlands that relate to mechanical plugging of aquifers and operational strategies to address this and biological fouling problems.  Several studies from Germany are discussed including an evaluation of the effectiveness of swabbing as a development tool,   the energy penetration ability of various mechanical and impulse generation methods, the ability of acids to dissolve different types of iron oxides, and the differential biologic fouling of well screens.  Finally a study from Australia is presented that looks at impacts of well drilling, and construction on the long term operation of wells completed in unconsolidated aquifers.

Jim Bailey, RG, Kleinfelder Inc. Jim Bailey, L.HG, RG is Well Services Director for Kleinfelder, Inc. and has 23 years experience in municipal water supply issues including water rights, well design/construction, and evaluation of well performance issues. He works closely with the largest well services company in Germany, Pigadi, on various well rehabilitation technologies and approaches to well performance. Since 2005 he has completed well evaluation/performance projects, in Alaska, Alabama, California, Hawaii, Idaho, Illinois, Nevada, Ohio, Oregon, Virginia, Maryland, New Mexico, Washington, and Canada. He is a frequent speaker at workshops on well maintenance and rehabilitation throughout the U.S.


2008 NGWA Conference on Eastern Regional Ground Water Issues