Underground Utilities

Get in touch for a consultation

Underground Utility Installation

At Riva and Cal Construction LLC, we provide safe, precise, and code-compliant underground utility services for residential, commercial, and industrial projects. Whether you’re a property owner, developer, or general contractor, our experienced team is ready to handle everything from trenching and conduit installation to water, sewer, and electrical line work. Backed by over 20 years of construction experience, we’re fully licensed (A & B California contractor licenses) and available for direct hire or subcontracting on projects throughout Santa Rosa and Sonoma County.

Contracting Service For Custom Builds

Water Line Installation

New water main connections
Water service lines for residential and commercial properties
Leak repairs and line replacements
Meter and backflow device installations

Sewer & Septic Systems

Sanitary sewer line installation and tie-ins
Septic tank excavation and placement
Sewer lateral repairs and upgrades
Leach field trenching and installation

Storm Drain Systems

Drainage pipe installation and culvert systems
Catch basins and stormwater retention
French drains and surface water management
Downspout drain connections

Gas Line Installation

Trenching for gas utility lines
New service connections for homes and ADUs
Repairs and gas line relocations
Coordination with utility providers for safety

Electrical & Communication Conduits

Electrical conduit trenching for power service
Underground wiring for lighting, solar, and more
Fiber optic and internet cable conduit installation
Smart home and security system wiring routes

Water Box Inlets & Outlets

Custom Cast-In-Place Concrete Boxes
Precast Box Installations & Connections
Outfall Structures to Creeks or Ditches
Grated Inlet Systems for heavy water capture
Energy Dissipation & Erosion Control Features

At Riva and Cal Construction Inc., we specialize in designing and building custom homes that reflect your unique style and needs. Our experienced team ensures a seamless process from concept to completion, delivering a high-quality home tailored to your vision.

Developing a Lasting Future

What to Expect

We follow a thorough and efficient process on all underground utility jobs:

Site Assessment & Utility Marking – We coordinate with utility companies and use ground marking to avoid existing lines.
Precision Trenching – We excavate to the required depth and slope, maintaining grade and safety.
Utility Installation – All lines and components are laid and connected per local codes.
Inspection & Testing – We ensure everything is up to code and functioning before backfilling.
Backfill & Final Grading – The site is compacted and restored to its original or improved condition.

Let’s Build Your Industrial Water System Right

Whether you need a custom water box inlet or outlet, or a complete drainage and stormwater management system, Riva and Cal Construction has the experience, equipment, and integrity to deliver a long-lasting solution.

Contact us today to schedule a site visit or request a quote for your next industrial project in Santa Rosa or beyond.