Bulk Aggregate Delivery Across Musselshell County, MT

Montana Rock Supply handles gravel, stone and aggregate delivery in Musselshell County, MT. Start with crushed base course, the standard Montana base material, and size the load with the calculator on each product page.

Order by the ton or by the yard, pick a delivery date at checkout, and a dump truck tips the pile on site in Roundup, Musselshell or anywhere between.

Delivery across Musselshell County

We deliver bulk aggregate across Musselshell County, including Roundup and Musselshell. You order online, choose a quantity by the ton or by the yard, and pick your delivery date at checkout.

Each product page has a calculator to help you size the load before you order. Once your order is placed, a dump truck arrives and tips the material in one pile on site.

Ground conditions in this part of Montana can affect timing. Work runs from breakup into autumn, and the benchland dries out quickly once spring runoff is past.

Clay subgrades soften as soon as they wet up. If your site is soft when the truck is due, plan for that before you place the order.

Materials delivered in Musselshell County

Here is what we carry and what each material is for. Crushed base course leads the list because it is the base most Montana work is built on.

3/4" Crushed Stone is a clean stone for drainage beds, pipe bedding and construction entrances. 3/8" Natural Pea Gravel suits walkways, play areas and dog runs where rounded stone is wanted.

Yellowstone River Rock is rounded river-washed stone for decorative beds, borders and dry creek beds. Shredded Mulch holds on slopes and in wind better than nuggets, which matters on open Montana ground.

Crushed base course is specified as crushed base course in Montana. The MDT Standard Specifications cover it under Section 701.02.4, where grades are named by nominal top size.

Grade 5A is 2 inch minus and Grade 6A is 1 1/2 inch minus. A 3/4 inch minus grade, 7A, was developed for MDT as pit sources for the larger sizes ran short.

City and county work is often written against Section 02235 of the Montana Public Works Standard Specifications, and county road standards call sizes out as 3 inch minus sub-base and 1 inch minus crushed base or top course.

Ground conditions across Musselshell County

Ground across the Central Montana benchlands and island ranges runs to deep silty and clayey prairie soils on the benches, with gravelly terraces along the rivers and shallow stony ground on the island ranges.

That clay is the part that matters. Clay subgrades soften as soon as they wet up, so an under-built base moves under a loaded truck.

Water comes from spring snowmelt running across ground that is still frozen underneath. Heavy summer thunderstorms on open benchland add to it.

Erosion shows up as wind scouring on open farmland and gullying on silt and clay slopes. Riprap and clean stone protect banks, coulee outlets and ditch lines where runoff concentrates.

Cold inland winters are cut by chinooks, so the ground freezes hard, thaws and refreezes repeatedly. Gravel roads soften and rut every time it cycles.

The local building department sets footing depth.

Choosing the right material

Ground in Musselshell County is deep silty and clayey prairie soil on the benches, with gravelly terraces along the rivers and shallow stony ground on the island ranges. Petroleum County shares that same ground region, so the base and drainage choices there work the same way.

Yellowstone County differs. Its ground runs to river terrace sand, gravel and cobble along the Yellowstone and Clarks Fork, silty loam bench soils above them, shale-derived clay on the rims, and shallow stony ground where the Beartooth front comes down.

Sand and gravel terrace ground drains more freely than clay benchland. Where the subgrade already sheds water, a clean washed stone drain does the work with less stone under it.

Rosebud County differs again. Its ground is bentonite-rich gumbo clay weathered off marine shale, with badlands, scoria beds and the broken ground of the Missouri Breaks, plus sand, gravel and cobble terraces.

Gumbo clay swells and holds water. On ground like that a base course needs the fines kept out of the drainage layer, so washed rock and Crushed Stone go in place of anything with binder in it.

On the clay benches here, crushed base course goes down over pit run where grade has to come up. Road mix surfaces the drive, and washed rock handles the drains.

Order crushed base course for your Musselshell County project

Crushed base course is the material most Montana ground is built on, and it is the right starting point for a drive, a pad or a parking area in Musselshell County.

Order online by the ton or by the yard, size the load with the calculator on the product page, and pick a delivery date at checkout.