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Big Dog Drilling is a family owned pier drilling company based out of Rockwall, Texas. It started operations in June of 2004 with one Texoma drill rig digging house piers and has grown into a company that can handle any size commercial project. It services the DFW Metroplex as well as Austin, San Antonio, and Houston, and travels to Arkansas, Louisiana, Oklahoma, New Mexico, and Kansas.

BellingCasingcoringSlurryStandard drilling

CGC Geoservices, LLC is a geotechnical and environmental drilling and geotechnical engineering consulting firm in business since 2008. Led by engineers, its staff includes experienced drillers, construction managers, geologists and engineers. The firm is a women-owned business enterprise with offices in Newark, DE; West Deptford, NJ; and Bel Air, MD, serving the mid-Atlantic region. In January 2021 it acquired Walton Corporation, a Delaware-based drilling firm with over 70 years of experience.

cone penetrometer testingenvironmental drillinggeotechnical drillinggeotechnical engineering consultingGeotechnical instrumentationgeothermal test well installationhollow stem augersinfiltration testinginterior drillingmud rotary drillingrock coringSPT samplingwater well installationwire line rock coring

Curtis Drilling is a foundation drilling contractor formed in 1979, providing caisson drilling, soldier pile drilling, shoring, geotechnical, and specialty drilling services for commercial, infrastructure, institutional, and residential projects across Southern California and the Western United States. It operates its own fleet of drills, concrete pumps, cranes, and lowboy trucks.

caisson drillingCFA drillingdeep rock drillingdewatering wellsequipment rentalhillside drillingmicropile drillingpier drillingrock and core drillingsecant pile wallsshoringsoilnail wallssoldier pile drillingtieback anchored walls

Connelly and Associates, Inc. is a drilling contractor serving Frederick, MD and the Mid-Atlantic region, established in 1991 as a small environmental drilling contractor with one rig. It now ranks as one of the largest geotechnical drilling firms in the Washington, D.C. and Baltimore, Maryland region, operating one of the most diverse and advanced drilling fleets in the Mid-Atlantic.

air knife/soft digauger drillingborehole samplingdirect push technology (DPT) drillingenvironmental drillinggeotechnical drillinggeothermal drillingmonitoring well installationMOTmud rotary and air rotary drillingrock coringsonic drillingStandard Penetration Testing (SPT)water well drilling