San Bernardino County pairs established west-end cities — Ontario, Fontana, Rancho Cucamonga, Chino, and Upland — with the warehouse and logistics corridors that keep expanding along the freeways. That work needs underground contractors who can handle utility installation for new development and heavy street work in live traffic. Mars Civil serves San Bernardino, Ontario, Fontana, Rancho Cucamonga, Chino, Chino Hills, Upland, and Redlands, performing trenching, mains, storm drain, slurry backfill, and street restoration for GCs, agencies, developers, and private owners.
Civil & Underground Services in San Bernardino County
One Class A contractor for the whole underground scope — self-performed by our own crews, from open cut to final restoration.
- Underground Utilities — Complete wet and dry utility installation — pipe, vaults, and conduit — from trench to tie-in.
- Sewer & Water Mains — New mains, replacements, and tie-ins built to agency spec and pressure-tested before backfill.
- Storm Drain — Storm drain pipe, structures, and catch basins that move water where it belongs.
- Trenching & Excavation — Safe, shored, traffic-controlled excavation by our own operators and our own iron.
- Slurry Backfill & Flowable Fill — Flowable fill (CLSM) that self-compacts to spec — no compaction testing, streets reopen sooner.
- Concrete & Street Restoration — Trench paving, curb, gutter, and sidewalk restored to spec after the underground work.
- Grading & Paving — Rough and finish grading, base, and asphalt paving for streets, lots, and utility corridors.
Part of our eight-county Southern California service area — see all locations we serve.
Public Works in San Bernardino County
Mars Civil bids both public and private work in San Bernardino County. We are set up for public works the way agencies require it — prevailing-wage crews, certified payroll, and complete bid packages turned around on deadline. We bid public and private scopes across the county’s west end and valley floor, and we’re SB-PW and SB(Micro) certified — a clean fit for agency rosters and small business participation goals.
Mars Civil is a division of Mars Construction Industries Corp — CSLB License #1138550 (A – General Engineering), SB-PW and SB(Micro) certified, Small Business Certification ID 2046756. Our small business certification also helps agencies and prime contractors meet participation goals on public work.
Frequently Asked Questions
Which San Bernardino County cities does Mars Civil serve?
Our regular coverage is the county’s west end and valley communities: San Bernardino, Ontario, Fontana, Rancho Cucamonga, Chino, Chino Hills, Upland, and Redlands. For larger scopes elsewhere in the county, call 714.746.7611 and talk it through with us.
Do your own crews perform the work?
Yes — Mars Civil self-performs with our own operators, pipelayers, and equipment. Self-performing means the schedule, the safety plan, and the finished product all sit with one accountable contractor.
Can you work on prevailing-wage public projects in San Bernardino County?
We can. Prevailing wage, certified payroll, and agency submittals are standard for us, and our SB-PW and SB(Micro) certification (Small Business Certification ID 2046756) helps agencies and primes meet small business goals.
How do I request a bid?
Send plans through the Request a Bid page or call 714.746.7611. Include your bid date — we confirm quickly whether we can hit it, and when we commit to a date, we meet it.
Have plans? Get a number.
Bid requests, plan sets, and project questions — send them over and we’ll respond fast.