Bulk Aggregates for Drainage in Amherst, NH
Water is the problem in Amherst, so start with the stone that moves it. New Hampshire Rock Supply runs gravel and aggregate delivery in Amherst, NH, and the calls we get here are mostly about wet ground. Sandy valley outwash drains fast. Dense till with a hardpan layer does not. Crushed gravel, washed stone and drain rock answer both, and we deliver them by the ton.
Materials for Amherst Projects
Drainage drives this market. French drains, drywells, downspout runs and foundation drains all need washed stone, because fines in the mix clog the pipe and the trench stops working. Order by size, coarsest to finest, and match the stone to the job.
Drain Rock is the workhorse for French drains, drywells, foundation drains and downspout runs. It stays open, so water keeps moving instead of backing up against your foundation. #4 Crushed Stone handles the heavy end: trench bottoms, construction entrances and severe drainage where you want big voids.
#57 Stone and #67 Stone sit in the middle. Both work in drainage and as concrete aggregate, with #67 running slightly smaller. 3/4" Crushed Stone covers drainage beds, drive surfacing and construction entrances.
Finer washed stone finishes the job. 3/8" Crushed Stone goes to fine drainage, pipe bedding and topping over a compacted base. #89 Crushed Stone packs tight joints and tight bedding.
For the base under all of it, Amherst runs on crushed gravel. It is the standard New Hampshire base material for driveways, parking pads and shed bases. Crusher Run binds and compacts where you want a tighter drive. Stone Dust beds pavers, flagstone and patios, the New England default under flatwork.
Ground and Conditions in Amherst
Time the work around the season, not the calendar. Base, driveway and paver work runs from the end of mud season into late fall. Frozen ground stops compaction through the winter, so a load dumped in January sits until spring.
The ground under Amherst splits two ways. Stony glacial till and ledge sit on the hills, with sand and gravel outwash in the river valleys, deepest along the Merrimack and Souhegan. Sandy outwash drains fast. Dense till with a hardpan layer drains slowly, and in mud season thawed soil holds water above ground that is still frozen.
That is why drainage stone matters more here than base stone alone. Put a washed layer under the slab or behind the wall and let the hardpan shed water sideways. Frost heaves lift gravel drives and roads as the ground thaws each spring, so build base depth for about 4 feet of frost in most towns. Your town building official sets footing depth.
Erosion is the other half. River and stream bank scour after heavy rain and snowmelt is real in this part of the state, as the May 2006 flood showed when record flows hit several rivers. Arm culvert outlets, stream banks and slopes with RipRap before spring runoff, not after.
Delivery to Amherst and the Surrounding Area
Order online and we deliver bulk to your site in Amherst. Amherst sits in Hillsborough County, and we cover the towns around it, including Manchester, Nashua, Merrimack, Hudson and Bedford. Lead time depends on the material and the season, so plan the delivery for the day you can spread it.
Buy by the ton or the yard. Tonnage suits stone and gravel. Yards suit sand, loam and mulch. Measure the area and settle on the depth you want, then use the calculator to turn it into tons or yards. Bulk delivery drops where the truck can reach, so point us at a firm, dry spot near the work.
Have the base ready before the stone lands. A driveway or drainage trench that is graded and compacted takes a load in one pass. Soft ground in mud season does not, and a truck that sinks costs you a day.
Order Bulk Stone and Gravel in Amherst
New Hampshire Rock Supply delivers crushed gravel, washed stone, drain rock, sand and loam across Amherst and Hillsborough County. Pick your material, size the load, and order online. We will get it to your site so the drainage and the base go in right the first time.