Large Diameter Drilling & Vertical Boring Services

SERVING: FRESNO, MADERA, KINGS, TULARE, KERN, MERCED, STANISLAUS & SAN JOAQUIN COUNTIES

When your project requires precision deep-hole boring or large-diameter foundations, you need a partner who understands the unique soil compositions of the Central Valley and the Foothills. At Big Bore Drilling, we provide the heavy-duty vertical boring equipment and licensed expertise (Class A & C-42) to ensure your infrastructure starts on a solid foundation.

Vertical Bucket Boring (24"–144")

Large-diameter vertical boring up to 70' for shafts, caissons, and sump wells.

Engineered Drainage Solutions

Vertical excavation of drain wells and seepage pits designed to bypass hardpan layers and maximize site percolation.

Precision Auger Drilling (8"–36")

Rapid-response drilling for test holes, fencing, and signage foundations using our powerful Bobcat auger drive.

VERTICAL BUCKET RIG BORING

We provide boring & drilling service for holes 24″ to to 144″ in diameter, up to depths of 70 ft. Our experienced team can drill holes for: Foundation holes, Caisson holes, Elevator shafts, Conductor holes, Excavations, Drain wells, Sump wells, and Rat holes. 



Explore Large-Diameter Capabilities
Drilling — Fresno, CA — Big Bore Drilling Certified Septic & Hydroflushing
Vertical Bucket Rig drilling large-diameter stormwater area drain in Lemoore, CA (Kings County) — Big Bore Drilling Inc.

Effective drainage starts with the right borehole. At Big Bore Drilling, we specialize in the vertical excavation of drain wells, seepage pits, and drywells designed to bypass surface-level clay and hardpan. Using our Vertical Bucket Rigs, we can reach the sandy, permeable soil layers necessary for maximum percolation. We offer both rock-filled and brick-lined installations, custom-drilled to the specific depth and diameter requirements of your site’s soil profile in Fresno and Madera Counties.



Explore Our Area Drain Capabilities

Precision Auger Drilling (8" – 36")

For high-volume projects requiring speed and precision, our Bobcat T870 and 50HP Auger drive provide the torque and stability needed for Central Valley soil. From specimen tree planting to large-scale fencing and pole barn footings, we deliver rapid-response drilling with minimal site disturbance.


Learn more about our auger drilling
Bobcat T870 with 50HP Auger attachment drilling precision holes in Central CA — Big Bore Drilling Inc.

Industrial & Commercial Drilling Service Area

Big Bore Drilling provides high-capacity vertical boring and precision auger services throughout a 150-mile radius of our Fresno headquarters.

We are fully equipped and licensed to mobilize for commercial and industrial projects across the following counties in Central California:


  • Fresno
  • Kings
  • Kern
  • Stanislaus
  • Madera
  • Tulare
  • Merced
  • San Joaquin