Cobble and Bulk Aggregates for Daly City, CA

California Rock Supply handles gravel and aggregate delivery in Daly City, CA, with Class 2 base as the workhorse material. Class 2 base, also called Class II base rock, is the standard California base for driveways, parking pads and the compacted layer under pavers and slabs. It is specified by Caltrans as Class 2 aggregate base, and it is what most Daly City ground work starts with.

Soils here change over short distances. Sandy dune and beach soils sit along parts of the shoreline, while heavy clay that cracks when dry and swells when wet covers much of the surrounding hills and valleys. That mix decides which stone you want.

Materials for Daly City Projects

Winter storms drive hillside runoff and slides on steep slopes, and intense rain on burned ground can send debris flows. Coarse, clean stone is how you armor those spots. The sizes below run coarsest to finest, with what each one does.

Rip rap, also called rock slope protection, is placed rock that holds a bank or slope in place when water runs across it. Caltrans calls placed rock on slopes rock slope protection, so you may see that term on plans. On a steep Daly City lot, this is the first line of defense.

Above it, #4 Crushed Stone gives you heavy open drainage for trench bottoms and construction entrances. Where water needs to move fast through a trench or behind a wall, 3/4" Drain Rock is the clean stone with no fines that lets it pass. Neither one compacts into a surface, so keep them out of the base.

For swales and dry creek beds, Large River Rock slows runoff and holds the channel shape. Then the base layer itself is Class 2 Base, the compacted material that carries a drive, a pad or a slab. Recycled Class 2 base and crushed miscellaneous base, sometimes called CMB, are the same idea made from Road Base or asphalt.

Under pavers and paths, Stone Screenings, also called DG, packs fine and firm over a compacted base. A drive that already has its base can be topped with driveway gravel, and walkways take a finer walkway gravel instead.

Delivery to Daly City and the Surrounding Area

You order online, choose your quantity by the ton or the yard, and size the load with the calculator before checkout. Bulk delivery to a site in Daly City means a dump truck arrives and places the material where you need it. You pick your delivery date at checkout.

California Rock Supply delivers across Daly City and San Mateo County, including San Mateo, Redwood City, South San Francisco, San Bruno and Pacifica. Check the access before the truck rolls. A long driveway, a tight gate or a steep shared drive changes where the pile can go.

Ground and Conditions in Daly City

Most rain falls from late fall to spring, much of it in a few large winter storms and atmospheric rivers. That rain soaks into sandy ground quickly but sits on or runs off clay soils and slopes. On clay, water that cannot drain will soften the subgrade under a base and a drive will move.

The dry season from late spring into fall is the main window for base, driveway and paver work. Summer fog near the shore is common, but it is winter rain and saturated clay that hold jobs up. If your ground stays wet, plan the drainage layer and the slope protection before you schedule the base.

Fill dirt, also called structural fill, raises grade and builds up a pad before Class 2 base goes down. On a slope, place your rip rap or large river rock first, then work back to the base.

Order Bulk Aggregates for Daly City

California Rock Supply delivers Class 2 base, rip rap, drain rock, cobble and topsoil across Daly City and San Mateo County. Pick your material, set the quantity by the ton or yard, and choose your delivery date at checkout. Order your load online when your site is ready.