What is the difference between crushed stone and Natural Pea Gravel?

Crushed stone has angular faces from a crusher, so it interlocks and packs into a stable surface. Natural Pea Gravel is rounded and washed, so it stays loose and lets water pass. Use crushed stone for bases and drives, and Natural Pea Gravel for walkways, play areas and drainage where rounded stone is wanted.

Should I order material by the ton or by the yard?

Both work. Quantities are ordered by the ton or by the yard, and each product page has a calculator to help you size the load. Have your area and the material you want in hand before you order.

Which stone is best for drainage in Blaine County?

Washed rock, the 3/4 clean stone, suits French drains, curtain drains, foundation drains and downspout runs because the fines are washed out. On heavy till that drains slowly, clean stone gives meltwater a path. Use 3/4 inch crushed stone for drainage beds and pipe bedding.

Order Crushed Base Course in Blaine County, MT

Montana Rock Supply handles gravel, stone and aggregate delivery in Blaine County, MT. Start with crushed base course, the 3/4 minus material most Montana drives and pads are built on.

Ground here is heavy glacial till over shale, and it drains slowly. Pick stone that moves water away from the base, and the base holds up.

Materials Delivered in Blaine County

Crushed base course is the standard base material in Montana. It is specified as crushed base course under Section 701.02.4 of the MDT Standard Specifications, where grades are named by top size: Grade 5A at 2 inch minus and Grade 6A at 1 1/2 inch minus.

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

Order 3/4 Crushed Base Course for driveways, shop pads, parking areas and shed bases.

Below the base, Pit Run is unprocessed pit gravel for deep fill, raising grade and sub-base under a crushed base course or a road mix surface.

For the finished driving surface, Driveway Gravel is the road mix. Montana road mix carries enough fines and clay binder to pack hard.

Where water has to leave, Washed Rock is the 3/4 clean stone for French drains, curtain drains, foundation drains and downspout runs. Washing the fines out is the whole point.

Ground Conditions Across Blaine County

Across the Hi-Line and the northern glaciated plains, the ground is glacial till over shale: a mix of clay, gravel, sand and silt left by the ice and by glacial lakes. Much of it is heavy and slow-draining, with coulee and river-bottom alluvium cut down through it.

Flat ground and heavy till drain slowly. Snowmelt ponds on subsoil that is still frozen, and a semi-arid year gets broken by a few intense summer storms.

That is why a drainage layer matters as much as the base itself. Clean washed stone gives meltwater somewhere to go.

The working season is short. Frost is in the ground from late autumn into spring, and compaction waits for it to come out.

Time a delivery around that window.

Winters here are some of the coldest in the state, with deep frost, long cold spells, and chinook thaws that cycle the surface without taking the frost fully out until spring.

Published frost depth figures across Montana run from about 36 to 60 inches, and the northern plains sit at the deep end of that range. The local building department sets footing depth.

Wind on bare ground, sheet and gully erosion in the coulees, and bank cutting on the Milk and the Missouri all move soil. Riprap and large round rock armor those edges.

Delivery Across Blaine County

Order online and a dump truck tips the load on site. Coverage runs across Blaine County, including Chinook, Harlem, Turner, Zurich, Hogeland and Lloyd.

Quantities are ordered by the ton or by the yard. Each product page has a calculator to help size the load.

Pick a delivery date at checkout.

Material arrives as one tipped pile. Plan where you want it before the truck reaches the site.

Choosing the Right Material

Chouteau County shares this ground. It sits on the same glacial till over shale, heavy and slow-draining, with coulee and river-bottom alluvium cut through it.

The base and drainage choices there follow the same reasoning as here.

Hill County reaches into the Central Montana benchlands and island ranges as well as this ground. Where the ground changes, drainage needs change with it.

Phillips County also spans more than one ground area, reaching the benchlands and island ranges alongside this till.

On ground like this, start with crushed base course for the base, then add washed rock where water has to move. Riprap handles the slopes and coulee edges.

Order Aggregate Delivery in Blaine County

Montana Rock Supply delivers crushed base course, washed rock, road mix, topsoil and sand across Blaine County, from Chinook and Harlem to Turner, Zurich, Hogeland and Lloyd. Order online by the ton or the yard, size the load with the calculator, and pick your delivery date at checkout.

Bulk Aggregate Delivery Across Blaine County, MT