Gravel, Stone and Soil for Warren County, PA

Pennsylvania Rock Supply handles gravel, stone and aggregate delivery in Warren County, PA. Start with the calculator to size the load, then pick the material. Most jobs here start with 2A modified, the base stone with the fines left in so it compacts hard.

Warren County sits on two different ground zones. The Allegheny high plateau runs stony soils over sandstone, shale and conglomerate, cut by steep valleys. The glaciated northwest is stony till over shale with a dense layer that drains slow.

Ground Conditions Across Warren County

Ground in the plateau zone is thin to moderately deep and stony, with coal beds and old mine ground in parts of it. Rain and snowmelt run fast off the valley sides and push into ditches, culverts and low drives. That concentrated flow is what eats a base that was not built to shed water.

In the glaciated zone around Russell, Columbus, Spring Creek and Sugar Grove, water perches above the dense till from fall into late spring. Low spots, drives and footings stay wet, and wetlands are common. A wet subgrade will not compact, and base stone should not go down on frozen or muddy ground.

Cold winters bring repeated freeze-thaw cycles, and frost depth is commonly 36 to 42 inches, set by each municipality. The higher ground runs cooler and wetter, so a thin or poorly drained base breaks up. Build the base thick enough and drain it.

Runoff off the steep slopes gullies gravel roads, ditches and culvert outlets and scours stream banks in the narrow valleys. Rain on snow can set off debris slides on mountainsides. Snowmelt and heavy rain do the same work in the glaciated zone, scouring roadside ditches and gravel drives.

Materials Delivered in Warren County

You order by the ton or yard and a dump truck delivers to the site. Here is what to order for the job in front of you.

2A modified is the trade name for a 2A-type base with extra fines added. Local yards still sell those sizes as 2B, 1B and 2A modified, and that is how you ask for them.

Clean stone is the other half of the job. Use 2B stone for a French drain or behind a wall in the wet glaciated ground. #67 stone does the same work where you want a slightly smaller clean stone. Drain Rock, #89 crushed stone and 3/8 inch crushed stone cover joints, tight bedding and fine drainage over a compacted base. For heavy work, #4 stone goes under construction entrances and underdrains, and Railroad Ballast handles hard standing and track beds.

Soil, fill and decorative stone round out a site. Fill Dirt raises grade before a base or topsoil goes down, Garden Soil fills raised beds, Washed Sand beds slabs and pavers, and Shredded Mulch holds moisture in beds. River Rock, Natural Pea Gravel and Driveway Gravel finish the surface.

Choosing the Right Material

The material shifts with the ground next door. Erie County spans the Lake Erie plain and the glaciated zone, so its low, flat ground drains differently and calls for more clean stone under a base. Crawford County shares the glaciated zone with Warren County and adds the plateau, so the choice is much the same: 2A modified where the ground drains, 2B where it does not.

Venango County shares the plateau and the glaciated zone with Warren County and adds the western plateau hills. Ground there is similar enough that the base and drainage calls match what works here.

Where the ground is the same across the line, the project decides instead. A driveway gets 2A modified with a clean stone edge drain. A patio gets 2A modified under screenings under the pavers, with 2B behind any retaining wall. A drain gets clean stone throughout, 2B or #57 with no fines in it.

Delivery Across Warren County

Order online and pick a quantity by the ton or yard. If you are not sure how much you need, the calculator sizes the load for you. Pick your delivery date at checkout, and a dump truck brings the material to the site.

Know where the truck can pull in and drop. A full load needs a firm, clear spot with room for the bed to raise and the tailgate to swing.

Order 2A Modified and More for Your Warren County Job

2A modified is the base stone most work in Warren County starts with, and it is the one to order first for a driveway, pad or patio. Pennsylvania Rock Supply delivers bulk gravel, stone, sand, soil and fill across the county. Size the load with the calculator, pick your material and quantity, and place the order online.