Instrumented Packers at TVA's Boone Dam-Video

Video Transcription

Video Summary

The presentation reviewed an additional drilling and grouting program at Boone Dam, designed to verify and create a seepage barrier beneath the cutoff wall. After issues in an earlier program, TVA strengthened procedures, including using an instrumented packer for every injection and directly controlling grouting. The packer proved reliable, durable, and more precise for measuring pressure than conventional calculations. Most stages showed low grout takes, increasing confidence in the cutoff wall and underlying rock. Limited high-flow data prevented firm conclusions about pressure behavior away from boreholes, so further analysis is needed. TVA plans to use instrumented packers in future work.

Keywords

Boone Dam

drilling and grouting

seepage barrier

instrumented packer

cutoff wall