Fill Dirt in Larkfield-Wikiup, CA

Delivered fill-dirt in the Larkfield-Wikiup area commonly ranges from about $12 to $30 per ton, depending on supplier location, haul distance, moisture content, and whether the material is screened. Local sourcing in Sonoma County can keep costs toward the lower end, while specialty or hauled-from-farther sites raises the price. For an exact price, request a Hello Gravel quote for your ZIP code and desired delivery date.

Hello Gravel’s minimum order is 3 tons. Deliveries to Larkfield-Wikiup are typically made by contracted dump trucks (commonly tri-axle), which usually carry roughly 10–16 cubic yards per load (about 12–22 tons for soils depending on moisture). If you need a smaller amount, check the checkout options or contact our team for split loads or pick-up alternatives.

For Sonoma County’s clay-prone soils, a compactable, well-graded fill-dirt mix that includes a portion of crushed rock is usually best because it drains and compacts better than rounded or purely loose soils. Pure rounded fill (river rock) does not interlock or compact well; engineered or compactable mixes give a stable base for paving or gravel driveways. For final base under pavers, use a compacted crushed-rock base over the compacted fill-dirt to reduce settlement risk.

Typical targets are 90% to 95% relative compaction (Standard Proctor) for structural or load-bearing areas; for non-structural fills under landscaping, 85% to 90% may be acceptable. Contractors usually place fill-dirt in lifts of 4 to 6 inches loose and compact each lift with plate compactors or rollers. Always verify compaction requirements with your engineer or local code if the fill supports a foundation or structural slab.

Fill-dirt performed for stability when properly compacted and graded; however, Sonoma County’s wet winters and dry summers can cause shrink-swell and surface runoff if drainage and compaction are inadequate. Use proper grading, drainage swales, and a well-compacted base to reduce settling and erosion. For areas with heavy clay, consider adding a crushed-rock buffer layer and improving surface drainage to limit water pooling and long-term movement.

Fill-dirt can be used to regrade small slopes and fill low spots, but for erosion control and slope stabilization in this area you should combine it with erosion-control practices like terracing, erosion control fabric, hydroseed, and proper drainage. Large slopes or cuts often need engineered solutions and retaining structures; consult a civil engineer or local contractor for steeper or higher-risk sites. For minor regrades, compact in lifts and protect exposed soil during winter rains to reduce erosion.

Fill-dirt alone is not an ideal long-term driveway surface; properly compacted fill under a crushed-rock base can last many years if installed correctly and kept well-drained. Expect to do occasional maintenance like regrading ruts, topping with additional base material, and keeping drainage clear, especially after heavy winter rains. For the best longevity, use a compacted structural base (crushed rock) over the fill and consider periodic topping every few years depending on traffic.

Significant grading, import of large volumes of fill, or changes to drainage often require permits and inspections from Sonoma County Permit and Resource Management Department (PRMD). Small residential deliveries and minor garden fills may not need a permit, but thresholds vary by volume, slope, and proximity to streams or protected areas. Always check with Sonoma County PRMD before import or major grading to avoid fines and ensure required erosion control and inspection procedures are followed.

Because soil density varies with moisture, a good rule of thumb for local fill-dirt is 1 cubic yard ≈ 1.2 to 1.5 short tons. Use the lower end for drier, looser soils and the higher end for damp, dense fill. For bids or precise ordering, use Hello Gravel’s calculator or request a supplier density figure to convert cubic yards to tons more accurately.

Fill-dirt is a general-purpose soil used to raise grades or fill voids; engineered structural fill is specified, tested, and compacted to meet load-bearing requirements and is the right choice under foundations or slabs. Decomposed granite (DG) is finer, compacts well, and makes a stable, attractive surface for paths or low-traffic driveways but is not a substitute for structural fill under foundations. For driveways in clay-prone Larkfield-Wikiup soils, a compacted engineered base or crushed-rock base over well-compacted fill-dirt is usually the best practical solution.