Repair, Evaluation, Maintenance, and Rehabilitation Research Program. evaluation of the rehabilitation program for relief wells at Leesville dam, Ohio. Final report, May 1986-June 1987
At a relief well and drainage system rehabilitation workshop held in April 1985, it was determined that maintenance methods varied between Districts and that no attempt had been made to document results versus the method used. The Huntington District was planning the rehabilitation of 12 wells at Leesville Dam, Ohio, and agreed to use a composite of the various common Corps of Engineer (CE) cleaning methods along with the extra verification procedures needed to document the results. Therefore, the objectives of the study were to document a commonly used CE well rehabilitation procedure, to provide the needed pre- and post-verification data, and to evaluate the results. For the study, encrustant, bacterial, and water analyses were conducted for use in planning the rehabilitation procedure. Recommended procedures and the final selected procedures for rehabilitation are presented. Planning criteria required that the chemicals be industry accepted and commonly used with economics being the final governing factor. The procedure used at this site incorporated a long linear phosphate and sodium hypochlorite as chemicals with mechanical agitation using a surge block. Several factors were considered during the evaluation: (a) the lake level was lowered between some of the pre- and post-pump tests; (b) there was no bacterial growth in two wells; and (c) there were hydrogeologic boundary conditions that altered groundwater quality, flow, and available bacterial nutrients from well to well. Although there were immediate benefits, post-bacterial analysis showed regrowth had started within 4 months of the rehabilitation. There was no as installed specific capacity on record to evaluate overall results.
- Research Organization:
- Army Engineer Waterways Experiment Station, Vicksburg, MS (United States). Geotechnical Lab.
- OSTI ID:
- 6944648
- Report Number(s):
- AD-A-259197/2/XAB; WES/TR/GL-REMR-GT-18
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
WATER WELLS
EVALUATION
MAINTENANCE
REMEDIAL ACTION
BACTERIA
CAPACITY
CLEANING
DAMS
DRAINAGE
ECONOMICS
GROUND WATER
INDUSTRY
LAKES
MEETINGS
NUTRIENTS
OHIO
PHOSPHATES
PLANNING
PUMPS
QUALITY ASSURANCE
REPAIR
RESEARCH PROGRAMS
SODIUM
SURGES
VERIFICATION
WATER TREATMENT
ALKALI METALS
DEVELOPED COUNTRIES
ELEMENTS
HYDROGEN COMPOUNDS
METALS
MICROORGANISMS
NORTH AMERICA
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
SURFACE WATERS
USA
WATER
WELLS
540250* - Environment
Terrestrial- Site Resource & Use Studies- (1990-)