1991 Foundation Prep and Treatment Report.pdf

This document is Appendix E from a 1991 SRS Foundation Report, detailing embankment foundation preparation and treatment during the initial construction of a dam structure completed in 1987. The document provides a comprehensive photographic and narrative account of foundation preparation for the right abutment, valley, and left abutment areas, focusing on critical construction techniques.

Key preparation methods included thoroughly cleaning bedrock, removing debris and loose rock using backhoes and hand tools, applying shotcrete and consolidation grouting to create a smooth surface, and using contact clay blankets to ensure foundation stability. The process involved strategic foundation modification between specific elevation points (such as El. 830-860 and El. 880-905), with careful attention to rock scaling, trimshot treatments, and preparation for subsequent impervious core and filter blanket placement. The photographs document various stages of foundation preparation, including rock cleaning, shotcrete application, and contact clay blanket placement, providing a detailed visual record of the construction techniques used during the project.