Underground Contracting
Underground Construction Services
Utility Installation
Ensure reliable utility services with our expert underground installation, designed for minimal surface disruption and long-term stability.
We offer:
- Conduit Systems for Cabling: Robust conduit system installations for electrical and communication cables to protect from environmental factors and human interference.
Directional Drilling
Utilize advanced directional drilling techniques to place utilities with minimal impact on the landscape and existing structures.
We offer:
- Horizontal Directional Drilling (HDD): HDD services for the installation of underground pipes, conduits, and cables with precision and minimal ecological footprint.
- Utility Boring: Non-disruptive boring techniques that allow for utility installation in congested areas without significant surface damage.
Manhole and Vault Construction
Construct and maintain access points to your underground utilities with our manhole and vault construction services for easy inspection and maintenance.
We offer:
- Precast Manholes: Installation of precast manholes for durable and rapid access to underground utilities.
- Custom Vaults: Custom-built vaults designed to house and protect critical connection points and utility controls.
When It’s Complicated, The Answer Is Simple. Sebastian!
For over 75 years, Sebastian Corp has provided exceptional electrical services in California.
Our team of highly trained, dedicated professionals will work closely with you to handle your electrical design, installation, troubleshooting, upgrade, and repair work.
Count on us for the most innovative solutions in electrical services.
What Clients Say About Us
Sebastian was able to determine the issues and make recommendations for solving those problems. We would most definitely recommend Sebastian to other colleges or businesses because of their well-rounded yet technical knowledge base, outstanding customer service, and continuing evolution of technology awareness.
Sebastian is one of the best companies I have worked with from a customer standpoint.
Sebastian is a well-recognized and highly recommended local company and a leader in the technology industry. Sebastian employees were all very gracious, friendly and technically competent. They were very quick to address our concerns.
Sebastian did a great job and I would use them again to run or fix fiber optic cables. Their team was very professional and did very clean work.
Karlene was a pleasure to work with and kept me updated during the entire process until the job was complete. I’ve worked with others in this industry and none compare to her experience or her professionalism!!
We are extremely appreciative and impressed not only with the work Sebastian has completed at Fresno State so far this year, but also the flexibility and commitment. We continually hear great things about Sebastian and are very excited to work with us on a new campus wide Access Point project.
Recent Projects
700 P. Street
- Fresno, CA
- CommercialMunicipal
- Fire Alarms, Access Control, CCTV
Agrian
- Fresno, CA
- AgricultureCommercial
- A/V, Video Wall, Telephony, WAP + IT Room, Alarms, Access Control
Costco
- Clovis, CA + Elk Grove, CA
- Commercial
- Underground, Electrical, Low Voltage, Site Lighting, Traffic Light Signalization
Sunmaid Headquarters
- Fresno, CA
- AgricultureCommercial
- Access Control, CCTV, Structured Cabling, A/V
Fresno State Communications Loop
- Fresno, CA
- Education
- Fiber, Structured Cabling, Underground
Heritage Center
- Clovis, CA
- Commercial
- CCTV, A/V, Projectors + Screens, IT infrastructure, Fire Alarms, Lighting
