Built for Challenging Environments
Some of California’s most demanding construction projects take place in remote locations where terrain, environmental requirements, and limited access create unique challenges. Allison Sierra Inc. is a family-owned underground utility and civil construction contractor providing specialized infrastructure services throughout California. Since 1978, we have delivered reliable construction solutions for utility providers, public agencies, municipalities, and infrastructure contractors in some of the state’s most challenging environments.
Services
Trusted by Utilities, Public Agencies & Infrastructure Leaders Across California
Serving utilities, public agencies, and contractors with underground utility and civil construction services since 1978.
Safety Starts Long Before We Break Ground
Working in remote terrain, active utility corridors, and environmentally sensitive areas requires careful planning and disciplined execution. Our crews are committed to performing every job safely, efficiently, and in compliance with project requirements—without exception.
