What is the difference between topsoil and fill dirt?

Topsoil is screened and clean, and it goes on top of the ground to grow lawns and beds. Fill dirt is structural fill for backfill, raising grade and bringing a low spot up before a base course goes on top. Fill dirt is not a growing medium, so it goes below the top layer rather than in place of it.

What is road mix and what is it used for in Madison County?

Road mix is crushed base with the fines left in, also called 3/4 road mix or 3/4 minus. It is specified locally under ITD Standard Specifications Section 703.04 and, on public works plans, as crushed aggregate Type I or Type II under Section 802. It goes under driveways, parking pads, shop floors and shed slabs.

How deep should a gravel driveway base be in Madison County?

No single depth fits every site, because the ground here is thin soil over basalt and the load has to be carried by the base itself. The local building official sets footing depth, and the frost figure commonly used at Idaho Falls is about 30 inches. Size your load with the calculator on each product page.

Madison County, ID Aggregate and Rock Delivery

Idaho Rock Supply brings gravel, stone and aggregate delivery in Madison County, ID to Rexburg, Sugar City and the ground between them. Road mix is the base material this area asks for by name, and it arrives with the fines left in so it locks up under a roller.

Across the Upper Snake River Plain and the eastern farm valleys, young basalt sits close to the surface under thin soil. That shallow ground shapes what you put on top of it.

Ground Conditions Across Madison County

Water is the first thing to think about on the Upper Snake River Plain and the eastern farm valleys. Basalt close to the surface leaves meltwater and rain nowhere to go, so it sits in low spots and softens ground that looked firm in July.

That shallow rock means a drive or a footing rests on thin soil over stone. A base course spread on that ground has to carry the load itself rather than count on what is underneath it.

Spring runoff off the Caribou and Centennial ranges, wind moving dune sand and dry field soil, and canal bank and culvert washouts during snowmelt all move ground around. Rip rap armors the places where that water concentrates.

The working season is short. Frozen ground stops compaction from late fall to early spring, and the dependable base and paver window runs from late spring into early autumn.

Winters here are the coldest sustained in settled Idaho, with long hard freezes at 4,500 feet and above and a sharp heaving thaw in spring. The local building official sets footing depth.

Materials Delivered in Madison County

Road mix, also called 3/4 road mix or crushed base, is crushed base with the fines left in. State highway work specifies it under the ITD Standard Specifications for Highway Construction, Section 703.04, which is where the 3/4 inch minus gradation comes from.

Section 703.11 covers granular subbase.

City, county and highway district work is usually written to the Idaho Standards for Public Works Construction. Section 802 covers crushed aggregate in Type I and Type II, and Section 801 covers uncrushed aggregate.

Those are how material is described on Idaho plans.

Road mix goes under driveways, parking pads, shop floors and shed slabs. A contractor ordering 3/4 minus and a homeowner ordering road mix are asking for the same load.

Drain rock is clean angular rock for french drains, foundation drains, drywells, septic drainfields and downspout runs. It comes in 3/4 inch, 1 1/2 inch and 2 inch.

Sand covers two jobs. Washed Sand beds pavers and slabs and goes into concrete work, while Mason Sand handles brick and block work, paver joints and play areas.

Soil and fill round out the list. Top Soil builds up lawns and beds over thin ground, Garden Soil fills raised beds where the native ground is too stony or too alkaline, and Fill Dirt raises grade before a base goes on.

Delivery Across Madison County

Ordering happens online. You pick the material, choose a quantity by the ton or by the yard, and set a delivery date at checkout.

Each product page has a calculator to help size the load.

A dump truck tips the load in one pile on arrival. Have the spot clear and reachable by a truck before the delivery date, since the driver tips the load and moves on.

Delivery covers Rexburg, Sugar City and the surrounding county. Bulk loads arrive as one pile, so plan where that pile should sit before the truck reaches the property.

Choosing the Right Material

Ground next door is not always the same ground. Teton County sits in the Central Idaho mountains and high valleys, where thin, coarse soils lie over the granite of the Idaho Batholith and weather down to sandy Stone Screenings, with glacial till and moraine around the valley heads.

That difference matters for base choice. Granite-derived sand and till drain and behave differently from the thin soil over young basalt here, so a base that locks up on the plain may need a different approach on mountain ground.

Bonneville County spans more than one zone, taking in both the Upper Snake River Plain and the eastern farm valleys and the Central Idaho mountains and high valleys. Jefferson County shares the same ground region as Madison County, so the material reasoning carries over unchanged.

Order Road Mix, Rock and Soil for Your Madison County Project

Idaho Rock Supply delivers road mix, drain rock, crushed rock, chips, sand, topsoil, garden soil and fill dirt to Rexburg, Sugar City and the rest of Madison County. Driveways, parking pads, shop floors, shed slabs, french drains, drywells, paver beds, garden beds and decorative borders all start with the right material underneath.

Pick your material, size the load by the ton or yard, and set a delivery date at checkout.

Road Mix, Sand and Gravel Delivery in Madison County, ID