What is 2A modified and what is it used for in Beaver County?

2A modified is crushed stone with the fines left in, so it compacts hard into a stable base. It is the standard Pennsylvania base stone, also called modified stone. In Beaver County it goes under driveways, parking pads, and shed and patio bases, and over fill dirt where grade has to come up before a hard surface goes down.

How deep should a gravel driveway base be in Beaver County?

Depth depends on your subgrade and how much water it holds. Clay-rich soils that stay wet soften and heave through repeated freeze-thaw cycles, so a thin or poorly drained base breaks up. Build thick enough to stay stable once the ground thaws, and get the drainage right first. Frost depth here is commonly about 36 inches, set by each municipality.

How much gravel do I need for my project?

Enter your measurements in the calculator on the product page and it sizes the load by the ton or yard. Measure the area, decide how deep the layer goes, and let the tool do the arithmetic. Order a little extra for compaction and for the low spots a dump truck leaves behind.

Beaver County 2A Modified and Gravel Delivery, PA

Pennsylvania Rock Supply handles gravel, stone and aggregate delivery in Beaver County, PA, and the ground here decides how much base you need. Local soils are silty and clay-rich, weathered from shale, sandstone and coal beds on hilly ground cut by steep valleys. Clay holds water, so a thin base softens and heaves. That is why 2A modified, crushed stone with the fines left in, is the base most jobs here start with.

Ground Conditions Across Beaver County

Beaver County sits in the Western Pennsylvania plateau hills. The rock underfoot is flat-lying shale, siltstone, sandstone, claystone and coal, weathered into silty, clay-rich soil. Many communities sit over old underground coal mines. Hilly ground and steep valleys mean water moves fast when it starts.

Heavy rain and snowmelt run down those hillsides. Water soaking into clay layers on slopes is the main landslide trigger, so where roof and drive runoff is sent matters on a hillside lot. Plan the drainage before you plan the stone.

Erosion shows up as slumping on steep clay slopes, stream bank scour and ditch washouts after heavy rain. On hillside ground, protect slopes with rip rap and send water to a controlled outlet instead of letting it sheet across a bare bank.

Base, driveway and paver work runs from spring, once the ground has thawed and dried, into late fall. Long wet spells and rain on snow are when hillside ground is most likely to move, so time a delivery for a dry stretch where you can.

Every winter brings repeated freeze-thaw cycles. Clay-rich soils that stay wet soften and heave, and a thin or poorly drained base breaks up under that. Frost depth is commonly about 36 inches, set by each municipality.

Materials Delivered in Beaver County

Local yards still use the older Pennsylvania names alongside those numbers: 2B for #57 and 1B for #8.

2A Modified is the standard Pennsylvania base stone, also called modified stone. It is crushed stone with the fines left in so it compacts hard, and it is the trade name for a 2A-type base with extra fines added. Order it for driveways, parking pads, and shed and patio bases.

Choosing the Right Material

Start with the job, then pick the size. A driveway or parking pad needs a compacting base, so 2A modified goes down first and driveway gravel tops it. Wet ground or a French drain needs clean stone instead, because fines clog the voids water should move through.

Allegheny County and Washington County share Beaver County's ground zone: the same flat-lying shale, sandstone and coal beds weathered into silty, clay-rich soils on hilly ground cut by steep valleys. The ground is similar, so the base and drainage choices are similar too. What differs is the mix of projects.

Lawrence County spans more than one zone, with a glaciated northeast and northwest as well as the plateau hills. Where ground was worked by ice, soils and drainage can differ from Beaver County's clay-heavy slopes, so check the subgrade before you assume the same base depth.

On any of these hillside lots, drainage is the deciding factor. If water reaches the base, no stone choice saves it. If it drains away, a compacted 2A modified base holds up through freeze-thaw.

Delivery Across Beaver County

Pennsylvania Rock Supply delivers bulk material across the county, including Aliquippa, Beaver Falls, Ambridge, New Brighton, Monaca, Beaver, Baden, Rochester, Midland, Conway, Industry, Freedom, New Galilee and Darlington. You order online, size the load by the ton or yard with the calculator, and pick a delivery date at checkout.

A dump truck then delivers to your site. Have the drop spot clear and reachable, and keep it close to where the material goes so you are not moving it twice. On a hillside lot, put the pile where a rainstorm will not wash it down the slope.

Order Beaver County Gravel and Stone Online

Pennsylvania Rock Supply delivers 2A modified, clean stone, sand, soil and decorative rock across Beaver County, from Aliquippa and Beaver Falls to Monaca, Rochester and the smaller communities in between. Size your load with the calculator, choose a delivery date at checkout, and a dump truck brings it to your site. Place your order online when you are ready.

Beaver County, PA Gravel and Landscape Rock Delivery