Dam Safety Instrumentation Performance of Boone Dam during Remediation Grouting-Video

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Video Summary

The presentation reviewed a dam-safety monitoring program of nearly 500 instruments, including about 200 vibrating-wire piezometers installed for investigations, grouting, and cutoff-wall construction. Monitoring supported real-time safety decisions and served as quality control for treatment effectiveness.<br /><br />During low-mobility grouting, instruments recorded temporary pressure increases in the embankment and deeper foundation. High-mobility grouting mainly affected the epikarst and bedrock, with muted responses during later downstage work—evidence that hydraulic connections were being sealed. Over the longer term, grouting and cutoff-wall construction reduced seepage connectivity. After reservoir refill, upstream piezometers tracked reservoir levels, while downstream readings remained largely isolated from them and responded mainly to rainfall and recharge from the right rim. Rainfall-related pressure increases downstream were temporary.<br /><br />The team concluded that potential groundwater-related failure risks did not warrant further treatment. Instrument damage was limited, though some readings became stagnant as groundwater levels fell.

Keywords

dam-safety monitoring

vibrating-wire piezometers

grouting effectiveness

cutoff-wall construction

seepage connectivity