Delivering civil solutions that keep California’s power grid reliable.

500+ Substations. Zero Rework.

Civil Substations, Inc. delivers safe, high-quality civil construction services for substations of every size and scope. With deep expertise in substation design, construction, and project management, we support utilities and private clients across California—on time, on budget, and without compromise.

END-TO-END SOLUTIONS

  • Construction site with leveled dirt and construction vehicles next to a busy highway and an electrical substation.

    Earthwork & Grading

    From clearing and grubbing to precision cut-and-fill operations, we prepare each site with safety and efficiency in mind. Our team delivers expertly graded pads, retention basins, and full demo work to support reliable substation infrastructure.

  • Construction workers at a work site, installing underground pipes using excavation equipment.

    Underground Utilities

    We install critical utility systems including duct banks, vaults, pull boxes, ground grids, and stormwater infrastructure. Our crews are trained to work safely and efficiently in energized environments and confined spaces.

  • Aerial view of a residential neighborhood with houses, including lawns and trees, where road construction is occurring with workers and construction vehicles paving the street.

    Foundations

    CSI specializes in drilled piers, equipment foundations, and containment pads designed for heavy substation loads. From deep piers to GIS slabs and blast wall footings, we deliver with zero rework quality.

  • Construction workers and a large truck repair a damaged street with broken asphalt and concrete, marked off with traffic cones and warning signs.

    Structural Concrete

    Our concrete crews build durable and precisely aligned structures for substations, including transformer pads, retaining walls, and oil containment systems. We meet the demands of both everyday operations and emergency response.

  • Construction site with workers laying concrete sidewalk, a concrete truck with a boom pouring concrete, and a small building in the background under a clear blue sky.

    Surface Restoration

    We leave every site looking clean, safe, and complete. Whether it’s final rock surfacing, new concrete roads, or asphalt rehab, our finish work reflects the quality of everything underneath.

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AFFILIATIONS & CERTIFICATIONS

  • Logo for Women's Business Enterprise, featuring the initials WBE in large font and the words 'Certified' and 'Women's Business Enterprise' around it.
  • ISNETWORLD member contractor badge with an orange hexagon and the letters 'ISN' in the center, surrounded by a white circular border with orange text reading 'ISNETWORLD MEMBER CONTRACTOR'.
  • Logo of the Common Ground Alliance with the acronym CGA in large blue letters and the full name beneath.
  • 811 logo with a shield and text that says 'Know what's below. Call before you dig.'