Why This Catalogue Is Built for Glacial Till, Ledge and a 42-Inch Frost Line

Push a probe bar into the ground beside an older Connecticut drive and you are about as likely to hit ledge as you are to find clean soil under it. That is the ground this catalogue was assembled for: rocky glacial till, bedrock close to the surface across much of the state, and water that moves sideways over that rock instead of soaking down through it. Every choice about what is worth listing comes back to it.

Base material comes first because frost gets to 42 inches

Frost reaches roughly 42 inches here, and it is the repetition that does the damage rather than the depth on its own. Ground freezes, thaws, takes on meltwater and freezes again, several times between December and April. No practical driveway base goes below that line, so the base is not there to escape frost. It is there to hold together while the ground beneath it moves.

That is why Processed Gravel sits near the front of the list rather than buried under decorative stone. It is the New England base aggregate, asked for locally as process or three-quarter process, and it is listed under its size and grading so the two names can be reconciled. Crusher Run sits alongside it for the jobs that want the tightest possible compacted layer.

A drainage shelf, because water on till has nowhere to go but sideways

The second block of the catalogue exists because of what till does with water. Washed stone with its fines removed, #57 stone, #67 stone and Drain Rock, keeps open voids so a footing perimeter, a wall backfill or a downspout run can actually carry water away. Put binding material in that trench and it stops working the first spring.

RipRap is on the list for the same reason at a different scale: a scoured stream bank inland after a thaw, or a shoreline edge along Long Island Sound that a storm has pulled apart.

Stone dust, trap rock and pea stone: the names people actually use here

Some of the list is simply vocabulary. Stone Dust is what a patio bedding layer is called in this part of the country, not screenings and not sand. 3/4 inch trap rock is the signature quarry rock of the Connecticut River Valley and gets asked for by that name far more often than by its size. Pea stone gets ordered more readily than pea gravel. Where a local term and a listing name differ, the product page carries both plus the size and grading, so a spec from a contractor or an engineer can be checked against what is being sold.

What this is: a catalogue, a calculator and a checkout

Connecticut Rock Supply sells bulk aggregate online. You browse the material, work out the quantity on the calculators, then set the tonnage, a delivery date and the delivery ZIP code at checkout. The ZIP is what settles the delivery: the order goes to a supplier in the network working near that address, an agent gets in touch to confirm exactly where the load is going, and the confirmation carries the date you picked and a local contact. What the truck needs at the other end is set out separately. There is no quote to chase, which for most of the jobs on this site is the point.

What it is not is an engineering service. If your job carries a structural or regulatory requirement, take the size and grading from the product pages to whoever is specifying it and have them confirm the material before you order.

Does any of this involve turning up somewhere with a trailer?

You list Processed Gravel, but the mason said 3/4 process. Are we talking about the same pile?

Can the catalogue handle a job an engineer has specified?

Does the same list suit the shoreline and the Litchfield Hills?