Fill Dirt in Alviso, CA

Fill dirt is clean, mostly mineral soil with few organics used to raise grades, backfill foundations, and fill low spots. In Alviso, where soils near the bay can be soft and marsh-influenced, fill dirt is commonly used to raise yard grades and prepare areas for landscaping, but it is not usually sufficient alone for structural building pads without additional engineering.

Prices vary with local supply, truck routes, and demand, but in the Alviso/Santa Clara area expect delivered fill dirt to commonly range from about $40 to $80 per cubic yard (roughly $30 to $60 per ton) as a ballpark. Costs can be higher for tight access, small orders, or contaminated-surface removal; get a local quote through our checkout to see exact pricing for your zip code.

Hello Gravel sources locally and delivers by dump truck, typically tri-axle trucks, with a minimum order of 3 tons. Standard delivery requires 2+ business days, and next-day delivery is available for orders placed before noon CST for an extra fee. Tailgate spreading is possible at the driver's discretion; request it at checkout but note there are no spreading guarantees.

You should check with Santa Clara County Planning and Public Works before large fills, because grading permits or other approvals may be required for substantial land raises, work in floodplains, or near wetlands. For structural work or where contamination is a concern, hire a geotechnical engineer to specify testing and whether the fill must meet engineered fill standards before you import material.

Engineered fill is required when a project will support structures, roadways, retaining walls, or when soils must meet specific compaction and material specs in geotechnical reports. For simple yard grading or small landscape raises in Alviso, standard fill dirt may be fine, but for foundations, driveways, or lot raises in marshy areas you will likely need engineered fill per a geotech's recommendations.

Local geotechnical practice typically calls for compacting imported fill to around 90-95% of the standard compaction test (ASTM D1557), using vibratory rollers, trench rollers, or plate compactors in lifts of 6 to 12 inches. Because Alviso soils can be soft and have a high water table, a geotechnical engineer should specify lift thickness, target moisture, and the compaction method before work begins.

For driveways and structural lot raises, fill dirt alone is usually not the best choice because it may have fines and poor drainage. Crusher run or engineered structural fill with proper gradation and compaction provides better load-bearing capacity and drainage for driveways; for lot raises near the bay, engineered fill is often recommended to address settlement and water table issues.

Use these rough examples: a single-car driveway resurfacing may need 10 to 25 cubic yards, a 2-inch yard raise over 1,000 sq ft needs about 62 cubic yards, and a small building pad (25x25 ft raised 1 foot) needs about 23 cubic yards. One loose cubic yard of common fill dirt weighs roughly 1.2 tons, so multiply cubic yards by about 1.2 to estimate tons, then order a bit extra (5-10%) for compaction and runoff.

Fill dirt with a high fines content can become compacted and hold water in the wet season, increasing runoff and erosion risk on slopes; in the dry season it can crust and shed water. For Alviso, improve performance by grading for positive drainage, using drainage rock or gravel where needed, stabilizing slopes with vegetation or erosion control fabric, and avoiding organic or high-clay fill that retains moisture.

Recycled or onsite fill can save money, but it must be evaluated for organics, contamination, and compaction behavior. You may still need testing and certification for reuse, especially for structural fills or where county permits apply, so consult a geotech and disclose material sources when ordering through Hello Gravel.

Use our website to check your zip code, choose Fill Dirt, and enter project dimensions for a calculator estimate, or call/text our team for help. Provide delivery address, desired delivery date, estimated cubic yards or tons, any access constraints, and whether you want tailgate spreading so we can match you with local suppliers and give an accurate delivered price and truck plan.