Order 2A Modified and Crushed Stone in Cumberland County, PA
For gravel, stone and aggregate delivery in Cumberland County, PA, start with 2A modified. It is the standard base stone here, crushed stone with the fines left in so it compacts hard. Pennsylvania Rock Supply delivers it by the ton for driveways, parking pads and shed bases.
This is folded bedrock country. Long sandstone ridges stand over valleys floored by shale or by limestone and dolomite that weather to clay, so a base that holds water will not last.
Materials Delivered in Cumberland County
Material is sized from coarsest to finest. Match the size to the job, and match the local name to the size so your load is right.
2A Modified carries the most weight here. It is crushed stone with the fines left in, and it is what Pennsylvania yards sell for a compacting base. 2A modified is the trade name for a 2A-type base with extra fines added.
#8 Crushed Stone, called 1B locally, is the small clean chip for walkways and decorative topping. For joints and tight bedding, order #89 Crushed Stone. Round out a load with Washed Sand for concrete and bedding.
Ground Conditions Across Cumberland County
Base, driveway and paver work runs from spring, once the ground has thawed and dried, into late fall. Base stone should not go down on frozen, soft or muddy ground.
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.
Rain and snowmelt run off steep ridge slopes into the valleys. In the limestone and dolomite valleys, runoff concentrated from roofs, gutters and drives can open sinkholes. That is a limestone-valley issue, not a statewide one.
Runoff from steep ridge slopes also scours roadside ditches, culvert outlets and gravel drives. Stream banks cut back during heavy rain and snowmelt. Clean stone and rip rap handle that water where a compacting base cannot.
Delivery Across Cumberland County
You order online. Size the load by the ton or by the yard, then let the calculator confirm the quantity for your job. Pick a delivery date at checkout.
A dump truck brings the material to your site and places the pile where you want it. Coverage runs across the county, including Carlisle, Mechanicsburg, Camp Hill, New Cumberland, Enola, Lemoyne, Shippensburg, Boiling Springs, Mount Holly Springs, Newville, Newburg and Walnut Bottom.
Have the drop spot clear and reachable before the truck arrives. Plan around the working season, and avoid scheduling a base stone delivery onto ground that is still frozen or soft.
Choosing the Right Material
Your choice starts with the ground under the work. A compacting base goes on firm, dry subgrade. A clean stone goes where water has to move.
- Driveways and parking pads: 2A modified for the base, then driveway gravel as a top surface.
- French drains and wall backfill: 2B stone or #57 stone, both clean and washed.
- Shed and patio bases: 2A modified, with screenings under pavers.
- Muddy or soft ground: #4 stone first, then build on top.
- Walkways: 1B stone, Natural Pea Gravel or walkway gravel, depending on how loose you want it.
Neighbouring counties change the answer. In York County and Adams County, the ground is mixed Piedmont, with loamy soils on the uplands, red shale and sandstone in the lowlands, and limestone valleys that weather to heavy clay. That limestone clay is close to what you see here, so drainage stone and a well-compacted base matter just as much. Dauphin County spans more than one zone, with Ridge and Valley ground like Cumberland County's and Piedmont ground besides. The same base and drainage choices carry over.
What is the difference between crushed stone and Natural Pea Gravel?
Crushed stone has angular, broken faces, so it locks together and compacts. 2A modified and 2B stone are crushed. Natural Pea Gravel is rounded natural stone, so it stays loose underfoot and drains well. Use crushed stone for bases and drives, and Natural Pea Gravel for walkways, play areas and decorative beds.
Should I order material by the ton or by the yard?
Both work, and the calculator converts between them for your job. Order by the ton for most bulk stone, since that is how it is weighed and sold. Order by the yard for soil, sand and mulch. Enter your measurements in the calculator and it sizes the load.
Which stone is best for drainage in Cumberland County?
Use clean, washed stone with no fines. 2B stone, which is the same size as #57 stone, is the common pick for French drains and wall backfill. Larger #4 stone suits underdrains and subgrade work. In limestone valleys, keep runoff away from the foundation, since concentrated water can open sinkholes.
Order Gravel and Stone for Your Cumberland County Job
Pennsylvania Rock Supply delivers 2A modified, clean stone, sand, soil and mulch across Cumberland County, from Carlisle and Mechanicsburg to Shippensburg and Newville. Size your load with the calculator, choose a delivery date at checkout, and a dump truck brings it to your site. Place your order when you are ready to build.