Bulk Aggregates for Erosion Control in Keene, NH

What stops a bank, swale or slope from washing out after spring snowmelt? For most jobs, it is coarse stone placed where water moves. New Hampshire Rock Supply handles gravel and aggregate delivery in Keene, NH, and the answer usually starts with the stone size.

On the stony glacial till and ledge around the Monadnock Region, water finds the weak spots fast. Crushed gravel and the coarser sizes below are what hold ground in place.

Materials for Keene Projects

Erosion work is a size decision. The bigger the stone, the more energy it takes to move it. Here are the sizes we deliver most for slope, swale and bank protection, listed coarsest to finest.

• RipRap: stream bank, culvert outlet, lakeshore and slope armoring against spring runoff. This is the first choice where moving water hits bare ground.
• #4 Crushed Stone: heavy drainage, construction entrances and trench bottoms, and a good base for a swale that carries fast water.
• Drain Rock: French drains, drywells, foundation drains and downspout runs that need to move water away from a footing.
• 3/4" Crushed Stone: drainage beds, drive surfacing and construction entrances, and a practical transition layer above coarser stone.
• Crushed Gravel: driveways, parking pads and shed bases. It is the standard New Hampshire base material, and it locks up tight when compacted.

For a walkway or a play area near the house, pea stone keeps the surface walkable. Stone dust is the New England default under pavers and flagstone, so bedding stays flat and firm.

If you are topping a drive that already drains well, Driveway Gravel is the surface layer. Coarse stone goes underneath, not on top.

Ground and Conditions in Keene

Timing drives everything here. Base, driveway and paver work runs from the end of mud season into late fall. Frozen ground stops compaction through the winter, so a delivery in January usually sits until spring.

Valley soils that are silty and clayey, plus dense hillside till, drain slowly and stay soft through mud season. Sandy terraces and outwash drain quickly. That difference sets your base depth and whether you need a drainage layer at all.

Winter brings repeated freeze-thaw, and frost heaves push up gravel drives and hill-town roads every spring. Frost depth runs about 4 feet in most towns, and the town building official sets footing depth for structures. That is why a shallow base on soft ground heaves, and why coarse stone over a drainage layer holds up better.

Erosion shows up after heavy rain and spring snowmelt, on the steeper streams coming off the hills. Bank scour is the usual call. RipRap and #4 Crushed Stone at the outlet are how you stop it from getting worse.

Delivery to Keene and the Surrounding Area

Order online and choose your quantity by the ton or by the yard, whichever you work in. Bulk delivery to a Keene site is a dump truck backing to your pile location, so plan the spot before the truck arrives.

We cover Keene and the rest of Cheshire County, including Swanzey, Rindge, Jaffrey, Winchester and Hinsdale. Lead time depends on material and how far out the site is, so it pays to order once the ground is workable.

If you are unsure how much stone a slope or swale needs, measure the length, width and depth and let the calculator size the order.

Questions About Stone in Keene

What stone should I use for drainage in Keene?

For a French drain or drywell, Drain Rock and #57 Stone are the workhorses, since both have open voids that let water move. For heavy drainage, trench bottoms and construction entrances, use #4 Crushed Stone. Where a bank or culvert outlet is scouring, RipRap is the size that stays put. Match the stone to how fast the water runs.

What should I have ready when the truck arrives?

Clear a spot the driver can back into and dump without hitting wires, branches or a septic cover. Mark the pile location so stone lands where you want it. If the ground is soft from mud season, pick a firm spot or have a pad ready. Tell us about any gate, low limb or tight turn ahead of time so delivery goes smoothly.

Order Erosion Stone in Keene

New Hampshire Rock Supply delivers bulk gravel, stone, sand and loam across Keene and Cheshire County. Whether you are armoring a bank, rebuilding a swale or topping a drive, order the size that fits the job and we will get it to your site.