Order 2A Modified and Crushed Stone in Lehigh County, PA
Storm runoff scours ditches, culvert outlets and gravel drives all over Lehigh County. Pennsylvania Rock Supply sells the stone that answers it, with gravel, stone and aggregate delivery in Lehigh County, PA.
Start with 2A modified. It is the standard Pennsylvania base stone, crushed stone with the fines left in so it compacts hard. Use it under driveways, parking pads and shed bases. Clean stone such as 2B handles the water.
Delivery across Lehigh County
Order online and pick your delivery date at checkout. Size the load by the ton or the yard, using the calculator if you want the figure checked. A dump truck then delivers to your site.
We cover Allentown, Whitehall, Emmaus, Breinigsville, Catasauqua and Slatington. Delivery also reaches Schnecksville, Coplay, Macungie, Alburtis, Coopersburg, Trexlertown, Laurys Station and New Tripoli.
Have the drop spot clear before the truck arrives. A full load needs room to spread and turn around.
Materials delivered in Lehigh County
Local yards still use the older Pennsylvania names alongside those numbers: 2B for #57 and 1B for #8.
2A modified carries the most weight here. It is a 2A-type base with extra fines added. Order it for driveways, parking pads and patio bases.
Add top soil for lawns and final grading, or fill dirt to raise grade before a base goes down. River rock and Natural Pea Gravel finish beds and paths.
Ground conditions across Lehigh County
This county spans two ground zones. The Great Valley and Ridge and Valley covers Allentown, Whitehall, Emmaus and Breinigsville. Coopersburg sits in the Southeastern Piedmont and Delaware River lowland.
In the Ridge and Valley, folded bedrock leaves long sandstone ridges with thin, stony soils. Valleys are floored by shale or by limestone and dolomite that weather to clay. Old strip mines and waste piles break up ground in the anthracite fields.
Coopersburg ground is mixed Piedmont: loamy soils on the uplands, red shale and sandstone in the lowlands, and limestone valleys that weather to heavy clay. A narrow strip along the Delaware River is loose sand and gravel.
Rain and snowmelt run off steep ridge slopes into the valleys. Over limestone and dolomite, runoff concentrated from roofs, gutters and drives can open sinkholes. Manage water away from the house first.
Cold winters bring repeated freeze-thaw cycles that heave and break up a thin base or one that holds water. Frost depth is commonly about 36 inches, set by each municipality.
Time the work between spring, once the ground has thawed and dried, and late fall. Base stone should not go down on frozen, soft or muddy ground.
Choosing the right material
Montgomery County sits in the Southeastern Piedmont and Delaware River lowland, with the same limestone valleys and heavy clay soils. Base and drainage choices there track Lehigh County closely, especially on clay.
Bucks County spans both zones, so its ground runs from Piedmont to Ridge and Valley. That means the same mix of compacting base and clean drainage stone applies, depending on which side of the county you build.
Berks County also spans both zones. Ground conditions there are similar to Lehigh County's, so typical projects match: 2A modified under drives, 2B behind walls.
Match the stone to the job, not the town. Compact a base where you park or pave. Use clean stone where water has to move.
Order Lehigh County aggregate delivered
Pennsylvania Rock Supply covers Lehigh County with 2A modified, clean drainage stone and the sand, soil and fill that go with them. Order online, size the load by the ton or yard, and set your delivery date at checkout. Place your order and get the stone on site.