Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/12782
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dc.contributorUnited States. Army. Corps of Engineers. Little Rock District-
dc.contributor.authorLlopis, José L.-
dc.contributor.authorButler, Dwain K.-
dc.date.accessioned2016-07-06T14:27:59Z-
dc.date.available2016-07-06T14:27:59Z-
dc.date.issued1988-05-
dc.identifier.urihttp://hdl.handle.net/11681/12782-
dc.descriptionTechnical Report-
dc.descriptionAbstract: A comprehensive seepage assessment of Beaver Dam, AR, was performed using a suite of geophysical methods. The Boone Formation, a severely weathered limestone, underlies Dike 1 and has been experiencing seepage since initial filling of the reservoir in 1966. Between the period 1968 and 1971 a grout curtain was constructed at Dike 1 to curtail this seepage. Although the grout curtain reduced the Dike's foundation leakage, recently discovered seeps and boils on the downstream toe of Dike 1 suggest that leakage is increasing to pregrouting levels. Following a recommendation of the May 1984 Dam Safety Assurance Program Reconnaissance Report, a geophysical investigation was undertaken to assess and delineate seepage paths and to map fault zones believed to behave as hydraulic conduits. The geophysical investigation conducted at Dike 1 consisted of self potential (SP), seismic refraction, electrical resistivity, electromagnetic induction, magnetic, downhole water conductivity, and downhole water temperature surveys. Results indicate that the geophysical tests were successful in determining the locations and strike of two faults bounding Dike 1. Results also indicate that seepage is pervasive rather than occurring in a few well defined conduits. Geophysical evidence suggests that the south bounding fault may act as a broad conduit for flow. The seismic refraction surveys indicate that the contact between the weathered limestone (Boone Formation) and the underlying more competent limestone is highly variable in depth. SP results indicate a correlation between SP values and pool elevation. Note: This file is very large. Allow your browser several minutes to download the file.-
dc.publisherGeotechnical Laboratory (U.S.)-
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relationhttp://acwc.sdp.sirsi.net/client/en_US/search/asset/1027161-
dc.relation.ispartofseriesTechnical report (U.S. Army Engineer Waterways Experiment Station) ; GL-88-6.-
dc.rightsApproved for public release; distribution is unlimited.-
dc.sourceThis Digital Resource was created from scans of the Print Resource-
dc.subjectBeaver Dam, Arkansas-
dc.subjectDams-
dc.subjectGeophysical investigation-
dc.subjectSeepage-
dc.subjectMaintenance-
dc.subjectRepair-
dc.subjectGeology-
dc.subjectSeismology-
dc.titleGeophysical investigation in support of Beaver Dam comprehensive seepage investigation-
dc.typeReporten_US
Appears in Collections:Technical Report

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