Centaur General Engineering in Alpine has held CSLB License #470303 as a Class A General Engineering Contractor since 1984, specializing in underground utility infrastructure across San Diego and Imperial counties. Core scopes cover water main installation, sanitary sewer line construction, storm drain systems, and concrete demolition — wet-utility disciplines that run parallel to the pipe-fitting work performed by Alpine Plumbing & Backhoe Inc on Alpine Blvd. The firm operates as an SDG&E-approved gas trench backfill contractor, qualifying Centaur for utility corridor work requiring compliance with CPUC General Order 112-F for natural gas pipeline proximity. Civil site preparation for solar array installations — a growing segment in Alpine's sun-exposed hillside parcels served by Clayco Electric Inc. Solar Specialist — requires the same trenching and conduit-bury expertise Centaur applies to municipal projects. Highest-complexity engagements include 48-inch RCP storm drain installation at depths exceeding 15 feet with trench shoring systems engineered to Cal/OSHA Title 8, Section 1541 excavation safety standards.