AbstractNumerous articles have been written in the past on the methods and techniques of resistivity and seismic exploration in ground‐water studies, however, few articles ever show why a specific type of survey was chosen and what the results or relative costs of such a survey were. In this paper, the authors have attempted to illustrate why particular techniques are chosen and indicate the actual results of the study. In addition, the general cost of the study is mentioned so that one might compare the cost versus other savings or benefits on the project.The four studies indicate that savings on projects may vary from many thousands of dollars to good will depending on the nature of the problem to be solve