#4 Crushed Stone for Soft Ground in Northern Indiana

In the lakes country the pile that turns up for a soft lane is usually coarser than the person who ordered it was picturing. Pieces the size of a fist and larger, angular, with daylight showing between them everywhere you look. Push a hand into it and nothing gives; push a boot in and it rolls rather than compresses. That is the point. On moraine ground with a muck pocket in the low corner, a layer you can see through is the only kind that stays open once it is buried.

#4 crushed stone on paper and in the pile

Three things follow from that spec and are worth having straight before you order.

It is a bottom-of-the-stack material. Nothing about it is finished, comfortable or level, and nothing is meant to be. A load of it is bought for what it does under something else.

It has no fines, so it never binds. What holds it together is the angularity of the pieces keying into one another under load, not dust filling the gaps. That keeps the voids open, which is the property you are actually buying.

The voids are large. Water moves through a layer of it far faster than through anything smaller, and fine soil moves into it just as easily, which is why what separates it from the ground below matters.

Jobs it fits around kettle ponds, muck pockets and outwash ridges

The one row that trips people up is the first. Coarse stone over soft ground works because it spreads the load across a wider area than the wheel that applied it, not because the stone itself is strong. That only happens if the layer is thick enough to arch, and if something keeps the soft ground from squeezing up into it.

Why the moraine decides how thick the layer goes

The northern lakes country is rolling moraine, loamy to clayey till on the ridges, broken by sandy and gravelly outwash plains, with kettle lakes, bogs and pockets of muck and peat sitting in the low places. Water soaks away quickly through the outwash. It perches on the denser till and collects in the kettles and the mucky low ground.

That means the depth question has no single answer on one property. Over firm outwash gravel a modest layer is plenty, because the ground below is already doing the work. Over a muck pocket the stone has to bridge, and bridging needs depth, often twice what a firm site needs, plus a separation layer so the muck does not migrate up between the pieces and destroy the arch.

Winter pushes the same way. Cold winters with repeated freeze-thaw heave a gravel drive and soften till subgrades each spring, so the wet, soft season is when a thin layer proves itself inadequate. Build from late spring, once the till and the low spots have dried out, through fall. Frozen ground stops compaction entirely.

Work out where the soft ground is before you order, not after. Walk it after a rain with a probe rod or a long screwdriver. Where it pushes in easily, the layer needs to be deeper and the fabric is not optional.

Tons for a pond edge, an entrance and a patio over muck

Hypothetical jobs, worked out here. Length times width times depth, all in feet, divided by 27, gives cubic yards. The site publishes about 2,900 lb per cubic yard for stone in this family, roughly 1.45 tons per cubic yard, so these tonnages are approximate.

A kettle pond edge, 70 feet of bank with a 6 foot face, at 9 inches. 70 x 6 = 420 square feet. Nine inches is 0.75 feet, so 420 x 0.75 = 315 cubic feet. 315 divided by 27 = 11.7 cubic yards, about 16.9 tons.

A construction entrance off the county road, 50 feet by 16 feet at 8 inches. 50 x 16 = 800 square feet. Eight inches is 0.667 feet, so 800 x 0.667 = 533 cubic feet. 533 divided by 27 = 19.8 cubic yards, roughly 28.6 tons.

The lower course under a paver patio built over a soft corner, 18 feet by 14 feet at 6 inches. 18 x 14 = 252 square feet. Six inches is 0.5 feet, so 252 x 0.5 = 126 cubic feet. 126 divided by 27 = 4.7 cubic yards, about 6.8 tons. That is only the coarse course. The compacted dense graded layer and the bedding above it are separate orders.

Run your own numbers through the stone calculator, which takes length and width in feet, depth in inches, a circle or up to five areas, and adds a 5 percent margin by default, which you can untick.

Staging a load on soft ground before anything gets spread

Order by picking a delivery date and then a quantity on this page. Delivery is arranged from your ZIP code at checkout.

The prep here is different from a normal aggregate delivery, because the reason you are buying the stone is that part of your site will not carry weight. Do not stage the load on the soft ground it is meant to fix. Pick firm ground, an outwash ridge, an existing drive, a field entrance, within reach of the work, and plan to move the stone in with a tractor bucket or a skid steer. Check the approach for low limbs and a turnaround, since a loaded truck needs room to raise a bed and a way out that is not a long blind reverse.

Have the fabric rolled out and the soft area excavated before the stone lands, so it goes in once rather than twice. Questions about depth over a particular soft spot are best sent with measurements through the contact page before the date is set.