Geotechnical investigation that consists of obtaining samples from four (4) bore holes at three (3) locations along the right abutment of the future Golden Gate Dam facility.

Geotechnical drilling consisting of:
- Completion of four (4) rotary-wash core borings ranging from 100 to 289 feet in depth. The drilling subcontractor is to provide the following associated with each core location.
o Two (2) bore holes are 100 feet deep each, one (1) bore hole is 250-feet deep, and one (1) bore hole is 289-feet deep
o Core size HQ 2.5-inch diameter
o Driller provides wooden core boxes for core samples
o Single stage packer testing at 20-foot intervals (4 of 4 locations)
o Televiewer measurements (4 of 4 locations)
o OYO suspension P-S logging (1 of 4 locations)
o Grouted Vibrating Wire Piezometer (2 of 4 locations)

Geotechnical drilling firms will be required to abide by the Project Labor Agreement established for the project which has been executed by Barnard, the State Building & Construction Trades Council of California, the Mid-Valley Building & Construction Trades Council, and the Signatory Craft Council and Unions.

To be considered for this work, a mandatory site visit will be held on Tuesday, September 15, 2026 starting at 10:00 am PST at 122 Old Highway 99 West, Maxwell California 95955.

Following the site visit, pricing shall be submitted via email on September 23, 2026 to Sitesreservoir@barnard-inc.com. Mobilization is expected to occur no later than October 19, 2026.