In 2018-19, DA Smith (formerly Agapito Associates, Inc.) conventionally cored three 18-inch- diameter holes each to a depth of 35 feet on the crest of Shasta Dam for the United States 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.