Repair, Evaluation, Maintenance, and Rehabilitation Research Program: Redevelopment of Relief Wells, Upper Wood River Drainage and Levee District, Madison County, Illinois
2006
Kissane, J. A. | Leach, R. E.
Upgrading of the Upper Wood River levees resulted in their ability to hold back higher river stages, which in turn resulted in increased underseepage. A program of testing and redevelopment of the existing relief wells was undertaken to optimize the efficiency of existing measures, to assist in assessing the need for additional wells, and to assess current well cleaning procedures. The study resulted in a three-phase program consisting of (1) conventional cleaning procedures, (2) demonstration of a blended chemical high temperature (BCHT) procedure, and (3) a full-scale BCHT treatment on 28 wells. Conventional cleaning consisted of applying varying doses of trisodium phosphate and sodium hypochlorite to the well. The BCHT procedure introduces in several phases doses of chlorine and acid applied with steam injection. The results of the study showed that the BCHT procedure was more effective than conventional methods (even when heavy mechanical surging was used). On the demonstration wells, specific capacities were increased to design values with the BCHT procedure after strenuous (to the point of diminishing returns) conventional methods had been applied with limited success.
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