Bulk Gravel and Aggregate Delivery in California

What holds up under a California driveway? Class 2 base does, and California Rock Supply brings bulk gravel and aggregate delivery across California to your site. Class 2 base, also called Class II base rock or class 2 aggregate base, is the standard base material here. It is specified by Caltrans Standard Specifications Section 26 as Class 2 or Class 3 aggregate base, in a 3/4 inch or 1-1/2 inch maximum grading. Class 2 is the higher-strength grade. Valley clay and hardpan pond water in winter, so base depth and drainage both matter.

Materials Delivered Across California

Order by size. Start with the coarsest stone and work down to the finest material, and match each size to the job in front of you.

Class 2 base is the one most California drives, pads and paver bases are built on. Caltrans specifies it as Class 2 or Class 3 aggregate base, and Class 2 is the higher-strength grade, the common base under drives, pads and pavers. The spec also allows processed reclaimed asphalt and concrete, which is why recycled Class 2 base is widely sold. Some suppliers list the same material as recycled base rock or crushed miscellaneous base. For base and drives where a compacting, binding material is wanted, buyers also ask for Crusher Run.

Above the base, Driveway Gravel surfaces an existing drive or tops a compacted Class 2 base. Walkway Gravel gives paths a finer, walkable surface, and Stone Screenings, also called DG, packs firm for paths and patios laid over a compacted base.

For water, 3/4" Drain Rock is clean stone with no fines, so it moves water through French drains and drainage trenches. Drain Rock handles drywells, downspout runs and drainage behind retaining walls. 3/4" Crushed Stone works in drainage beds, drive surfacing and construction entrances, while 3/8" Crushed Stone covers fine drainage, pipe bedding and topping over a compacted base.

On slopes and creek banks, RipRap, also called rock slope protection, armors against winter storm runoff. Decorative beds and dry creek beds take River Cobble, and Large River Rock slows runoff in swales. Under slabs and pavers, Mason Sand and Washed Sand level and bed. Planting areas take Top Soil over clay, hardpan or sandy native ground, and Fill Dirt raises grade before a Class 2 base goes down.

Ground and Climate Across California

Ground changes fast here, and so does the right way to build on it. On the Coast and Coast Ranges (North Coast, Bay Area, Central Coast), sandy dune and beach soils sit along parts of the shoreline, while heavy clay soils that crack when dry and swell when wet are extensive in the Coast Range valleys and hills. Frost is not a factor; the local building department sets minimum footing depth.

On the Central Valley floor, deep valley alluvium covers heavy clay that cracks in summer in the flood basins and along the valley edges, with cemented hardpan a few feet down across parts of the valley. Water ponds on that clay and hardpan, so drainage stone under and around the base matters. In the Sierra Nevada foothills and the hills around the northern Sacramento Valley, soils are rocky and often shallow over bedrock, with clay in many areas and fast-draining Stone Screenings in others.

In the mountains, soils are mostly thin and rocky over granite, volcanic or metamorphic rock, coarse and sandy where granite has weathered. Freeze-thaw is a real design factor in mountain towns from the Sierra and northern mountains to Big Bear Lake, Wrightwood and Tehachapi, where local building departments set frost depths such as 18 to 24 inches. That is a footing depth set by the building official.

Across the Southern California coastal plains and inland valleys, including the Inland Empire valleys, alluvial plains, fans and terraces carry soils from Top Soil to clay, with expansive clay in many basins and hills. In the Mojave Desert, Owens Valley and the low Colorado Desert, sandy and gravelly soils on alluvial fans and washes take water quickly, with wind-blown fine sand in places and slow-draining silty clay on old lake beds.

Timing follows the same map. The dry season from late spring into fall is the main working window on the coast, in the valleys and in the foothills. Snow and frozen ground close work in the mountains in winter, and on the low desert summer heat, not winter rain, is the main constraint. Most of the state gets its rain from late fall to spring in a few large storms and atmospheric rivers.

Where We Deliver in California

California Rock Supply delivers across California. That covers Los Angeles County, San Diego County, Orange County, Riverside County, San Bernardino County, Santa Clara County, Alameda County, Sacramento County, Contra Costa County, Fresno County, Kern County and Ventura County, along with the regions in between: Southern California, the Inland Empire, the Central Coast, the Bay Area, the North Coast, the Central Valley, the Sacramento Valley, Gold Country, the Sierra Nevada, the Eastern Sierra, the Shasta Cascade, the Mojave Desert and the Colorado Desert.

A dump truck brings your load to the site and drops it where you need it. You pick your delivery date at checkout.

How to Order and Size a Load

Order online and choose your quantity by the ton or by the yard. If you are not sure how much the job needs, size the load with the calculator. Then pick a delivery date at checkout and a dump truck delivers to the site.

If you want one material for a whole commercial or contractor job, order it the same way. Larger quantities are handled as a single order, and you choose the quantity and the delivery date at checkout.

Order Bulk Gravel and Aggregate Across California

California Rock Supply delivers bulk gravel, sand and topsoil across California, from Los Angeles County and San Diego County to Sacramento County and the Sierra Nevada. Class 2 base, drain rock, Stone Screenings, sand and soil all arrive by dump truck when you choose your delivery date at checkout. Pick your material, choose your quantity by the ton or by the yard, and place your order online.