In 2018-19, DA Smith* conventionally cored three 18-inch-diameter holes each to a depth of 35 feet on the crest of Shasta Dam for the US Bureau of Reclamation (USBR). Large-diameter cores were required for concrete properties testing as part of the Shasta Dam Raise Project.
DA Smith* subcontracted Groupe Fordia Inc., Northwest Machine, and other expert vendors to design and build the unique 18-inch-diameter coring bit and tools. Each 5-foot core run weighed approximately 1,000 pounds. The core was boxed in specially designed crates and shipped via temperature-controlled freight to the Denver Federal Center for materials properties testing. The 18-inch core holes and other 10-inch, 80-foot-deep holes were pump-grouted with non-shrink concrete.
* Formerly as Agapito Associates, Inc.