2A Modified, Sand and Gravel Delivery in Union County, PA
Pennsylvania Rock Supply handles gravel, stone and aggregate delivery in Union County, PA. The base stone buyers ask for here is 2A modified, also called modified stone. It is crushed stone with the fines left in, so it compacts hard under a driveway, a parking pad or a shed base.
Union County sits on folded bedrock: long sandstone ridges with thin, stony soils, and valleys floored by shale or by limestone and dolomite that weather to clay. That ground decides how much base you need and how well it drains.
Ground Conditions Across Union 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. If you build on muck, the stone moves instead of locking up.
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, so check with your township before a footing or post goes in.
Rain and snowmelt run off steep ridge slopes into the valleys. In limestone and dolomite valleys, concentrated runoff from roofs, gutters and drives can open sinkholes. Keep water moving away from the house and out of the base.
That same runoff scours roadside ditches, culvert outlets and gravel drives, and stream banks cut back during heavy rain and snowmelt. Stone size and placement matter most on those slopes.
Materials Delivered in Union County
2A modified is the standard Pennsylvania base stone. It is sold locally as a 2A-type base with extra fines added. The extra fines are what let it compact hard. Order it for driveways, parking pads, and shed and patio bases.
2B is the same size as #57, and 1B is the same size as #8.
Below the clean stone, Fill Dirt raises grade, fills low spots and backfills before a base or topsoil goes down. On top, Top Soil is screened to take out stones and roots for lawns, final grading and bed prep. Washed Sand, also called concrete sand, covers concrete work and bedding under pavers and slabs, while Mason Sand is for brick and block mortar and paver joints.
Choosing the Right Material
Snyder County shares Union County's ground: the same folded bedrock, sandstone ridges and limestone valleys. The material choice is similar there. The projects differ more than the ground does, with more drive resurfacing on one side of the line and more drainage work on the other.
Lycoming County sits partly on the same ridge and valley zone and partly on the North-central high plateau and Allegheny Mountains. On the higher ground, cooler, wetter conditions make drainage a bigger part of the plan, so 2B or #57 moves up the list next to a 2A modified base.
Centre County spans the same ridge and valley ground plus Western Pennsylvania plateau hills and the high plateau. More of that county sits on plateau, where shallow soils over rock push buyers toward clean drainage stone. Union County work leans harder on 2A modified for driveways and pads.
Within Union County, match the stone to the job. Use 2A modified where a surface has to compact and carry weight. Use 2B or #57 where water has to pass through. Use screenings where pavers or flagstone need a firm, fine bed. Use rip rap where runoff hits a bank or a culvert outlet.
Delivery Across Union County
Order online, choose a quantity by the ton or the yard, and pick a delivery date at checkout. A dump truck brings the load to your site and tips it where you want it. Size the load with the calculator before you check out so the quantity matches the job.
Delivery covers Lewisburg, Mifflinburg, New Columbia, Winfield, New Berlin, West Milton, Allenwood and Millmont. Ridge roads and narrow lanes are part of the route, so clear a spot the truck can reach and turn around.
Order 2A Modified and Drainage Stone in Union County
Pennsylvania Rock Supply delivers bulk gravel, stone, sand, topsoil and fill across Union County, from Lewisburg and Mifflinburg to Winfield, New Berlin, West Milton, Allenwood and Millmont. Choose your material, size the load with the calculator, then set a delivery date at checkout. Place your order online when you are ready.