A Delta island behind 11.5 miles of levees

Asphalt Paving in Bethel Island, CA

Below sea level, reached by one bridge, with marinas and homes on soft island ground.

Free on-site estimates
Itemized written quote: base depth and asphalt thickness listed
City and County right-of-way permits explained before work is scheduled

Paving on a Delta Island

Asphalt paving on Bethel Island deals with conditions found almost nowhere else in the county. The island is mostly below sea level and protected by earthen levees, and its only land access is the bridge connecting Bethel Island Road to Cypress Road in Oakley. Delta ground is soft and often damp, so a driveway or marina lot here needs a firm, well-compacted base and grading that sends rain into the drainage system rather than letting it pond.

Getting materials onto the island

With only one road in, hauling base rock and hot mix takes planning. We schedule trucks so asphalt arrives hot and the job can be finished in one push, and we keep delivery traffic in mind for neighbors and marina customers.

Marinas and businesses

Bethel Island has 13 commercial marinas as well as about 1,300 homes and four mobile home parks. Marina lots carry trucks, boat trailers and seasonal crowds, so we build them with a heavier section, seal them, and stripe stalls and trailer parking clearly.

Local agencies

The Bethel Island Municipal Improvement District, created by the State Legislature from Reclamation District 1619 in 1960, oversees the island's levees and drainage. Road right-of-way on the island falls under Contra Costa County Public Works. We check with the right agency when work comes near a levee, a drainage ditch or the road.

Homes, mobile home parks and marinas

Bethel Island's 2020 housing count of 1,244 units includes older cabins, newer homes and four mobile home parks, plus 13 commercial marinas. Many driveways and roads within parks and marinas are private, so the owner or association decides on paving and maintenance. These private roads often carry more traffic than the original pavement was built for, especially in boating season. We map failures, patch the worst areas full depth, and overlay or sealcoat the rest, then stripe parking where it helps. Electricity only arrived on the island in 1946 and phone service in 1949, and some properties still have long-ago pavement that has been patched for decades.

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What to Know in Bethel Island

Below sea level. Bethel Island is mostly below sea level and protected by about 11.5 miles of earthen levees; it became an island in 1911 when Dutch Slough was dredged to join Sandmound Slough.
One way in. The only land access is a bridge connecting Bethel Island Road to Cypress Road in Oakley.
Homes and marinas. The island has about 1,300 residential houses, four mobile home parks and 13 commercial marinas; the 2020 census counted 1,244 housing units, 79.6% owner-occupied.
Local district. The Bethel Island Municipal Improvement District was created from Reclamation District 1619 in 1960 and has five elected directors.

Our Services in Bethel Island, CA

Bethel Island Questions

Can asphalt hold up on Bethel Island's soft ground?

Yes, with soft subgrade removed, a well-compacted aggregate base and drainage planned so water does not pond on or under the pavement.

Do you pave marina parking lots?

Yes, including trailer parking, sealcoat and striping, scheduled around the boating season.

Is it harder to schedule work on the island?

It takes more planning because all trucks use one bridge, but we schedule deliveries so the asphalt arrives hot.

Can you pave the private roads in a mobile home park?

Yes. We work with the park owner on phasing so residents keep access.

Do levees affect driveway work?

Work near or on a levee needs coordination with the island's improvement district. Most driveways are well away from it.

Free Estimates in Bethel Island, CA

Free estimates for asphalt paving on Bethel Island.

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