San Francisco Public Utilities Commission (SFPUC)’s $500 million Calaveras Dam Replacement Project is under construction and will require excavation of approximately seven million cubic yards of material for construction of a new 210-ft high earth and rockfill dam, a 1,550-foot long concrete spillway, an outlet tower and three new tunnels.
TERRA Engineers, Inc. is a sub-consultant to Black & Veatch, who was retained by SFPUC to be the construction manager for the project. TERRA Engineers’ role on the project is to support Black & Veatch by coordinating the foundation grouting program; managing a database for QC data; summarizing, evaluating and reporting grouting and tieback anchor data; and field mapping rock conditions at the base of excavations.
TERRA Engineers is responsible for:
- Preparing scaled cross sections of the grouting plan that are used as base maps for summarizing grouting data
- Planning the location, inclination and azimuth of grout holes to address stitch grouting features
- Preparing Hole Instruction Sheets for all grout holes
- Developing and maintaining a grouting database containing grouting records
- Summarizing the grouting data on the scaled cross sections
- Reviewing field inspectors daily reports
- Reviewing, interpreting and marking-up grouting data provided by the grouting contractor
- Tracking quantities on a daily basis
- Preparing and/or reviewing the bi-monthly grouting report text and figures
- Mapping rock surfaces and ground conditions
- Providing recommendations for where rock bolts should be placed to maintain slope stability