Our Areas of Expertise
Storm Drainage & Utility Trenching – Bay Area, CA
At Jandu General Engineering Inc., we specialize in storm drain construction, utility trenching, and drainage system installations across the San Francisco Peninsula and South Bay, including Hillsborough, Burlingame, Menlo Park, Los Altos, Saratoga, and San Jose. From detention and retention systems to utilities, subdrains, and energy dissipaters, our team delivers precise, code-compliant underground work using laser-grade trenching, proper compaction, and inspection coordination. Whether it’s new construction or site upgrades, we ensure your drainage and utility systems are built for long-term performance and reliability.
(510) 602-1518— Licensed • Bonded • Insured | CSLB #A-1095286
Areas of Expertise
Storm Drainage, Detention Basins & Utility Trenching
We provide storm drain and underground utility trenching solutions across the SF Bay Area, specializing in detention systems, sewer tie-ins, subdrains, and energy dissipaters. Every system is installed with precision grading, proper compaction, and code compliance to ensure long-term performance and drainage reliability.
Detention & Retention Systems
Our team installs detention and retention systems that capture, store, and control stormwater runoff. Each system is built to civil engineering drainage standards, ensuring compliance with local stormwater management requirements and long-term site stability.
Energy Dissipaters & Dissipation Trenches
We construct rock-lined dissipaters and outlet trenches to safely reduce water velocity at drainage discharge points. These systems prevent erosion, stabilize slopes, and protect surrounding soil and structures from long-term water damage.
House & Basement Perimeter Subdrains
We install foundation and basement subdrain systems designed to remove groundwater and prevent hydrostatic pressure buildup. Using perforated drain piping, filter fabric, and gravel backfill, we protect structural integrity and ensure dry, stable foundations.
Sewer Tie-Ins & Utility Trenching
Our utility trenching and sewer tie-in services include the installation of storm, sewer, electrical, and water lines with accurate grade, compaction, and backfill. We manage all trench work to meet city inspection and flow requirements for new construction and site upgrades.
What We Do At jandu
Why Should You Hire Us?
Quality service goes beyond the job itself, as our team is committed to providing the best service to our customers. We are happy to answer any questions you may have before, after, and throughout the process.
Licensed & Insured
Fully licensed, bonded & insured Bay Area contractor.
On-Time & On- Budget
We finish projects as promised.
Family Owned & Operated
Family Owned & Operated business with a skilled crew.
Local Bay Area Experts
Over 15 years of local experience in excavation and demolition operations
want to ask anything
Frequently Asked Questions
You’re invited to browse a selection of recently completed projects below
What’s the difference between a storm drainage system and standard site drainage?
Storm drainage systems are designed to collect and direct surface runoff away from structures and into approved discharge points, while standard site drainage focuses on managing localized water around the property. The correct system depends on site conditions and approved plans.
What are detention and retention systems, and why are they important?
Detention and retention systems manage stormwater runoff by controlling flow rates and reducing downstream impact. These systems are often required by cities to meet drainage and environmental regulations.
How is trench backfill and compaction handled?
Trenches are backfilled and compacted in controlled lifts to minimize settlement. When required, we coordinate with third-party testing to meet city or engineering specifications.
What is a subdrain, and when should one be installed?
A subdrain is an underground drainage system used to relieve groundwater pressure and manage subsurface water. It’s typically installed when required by plans, soil conditions, or hillside and foundation drainage needs.
What does utility trenching typically include?
Utility trenching includes excavating trenches for underground utilities such as storm drains, sewer lines, and other site services, performed according to approved plans and safety requirements.
Do you coordinate inspections and city requirements?
Yes. We coordinate required inspections and comply with local city, utility, and safety requirements throughout the trenching and drainage installation process.