Order Road Mix and Crushed Stone in Twin Falls County, ID
Idaho Rock Supply handles gravel, stone and aggregate delivery in Twin Falls County, ID. If you are building a driveway, a parking pad or a shop floor, the load you want is road mix.
Road mix is crushed base with the fines left in, and it locks up under a roller. Order it online by the ton or the yard, and a dump truck tips it on site.
Materials Delivered in Twin Falls County
Road mix, also called 3/4 road mix or 3/4 minus, is the base course under driveways, parking pads, shop floors and shed slabs. A contractor asking for 3/4 minus and a homeowner asking for road mix are asking for the same load.
On public work in Idaho, base material is written up by spec rather than by nickname. State highway work follows the ITD Standard Specifications for Highway Construction, where Section 703.04 covers Aggregate for Untreated Base, Treated Base and Road Mix and is the source of the 3/4 inch minus gradation.
Section 703.11 covers aggregate for granular subbase. City, county and highway district work is usually written to the Idaho Standards for Public Works Construction, where crushed aggregate is called out as Type I or Type II under Section 802, and uncrushed aggregate under Section 801.
Choosing the Right Material
Owyhee County sits in Southwest Idaho, on the Treasure Valley and the western Snake River Plain. Its ground is old lake silt, sand and clay with basalt beneath, worked into irrigated silt loam on the valley floor.
It also carries sandy and gravelly terraces and hard caliche layers under thin desert soils on the benches. Caliche is a cemented layer that water will not pass, so a drainage run there has to be planned around it rather than into it.
Cassia County and Jerome County both sit in the Magic Valley, on the same ground region as Twin Falls County. The ground is the same, so the base and drainage choices carry over.
Ground Conditions Across Twin Falls County
Across the Magic Valley and the central Snake River Plain, the ground is a thin blanket of loess and wind-laid silt loam over fractured basalt. Rock often sits within a few feet of the surface, with river gravel and sand along the Snake and rimrock and talus at the canyon edges.
That thin cover is where a base fails. Water either runs into the fractured basalt and vanishes, or it backs up where the soil over the rock is thin and tight.
Irrigation canals and the springs along the Snake River canyon keep parts of the valley floor wet right through the season. A drainage layer of clean rock gives that water somewhere to go.
Wind strips dry bare fields, and cloudburst runoff cuts into canyon rims and coulees. Riprap on a cut slope or a culvert outlet holds that ground in place.
Work runs from the spring thaw into late fall, with spring dust and an early fall freeze-up as the practical limits at either end. Winters are cold and dry with hard freezing and repeated thaw cycles on open ground.
No published frost depth was found for Twin Falls County. The working range used across the Magic Valley is roughly 24 to 30 inches, and Idaho code leaves the frost line to the local jurisdiction, so the building official sets it.
Delivery Across Twin Falls County
You order online and choose a quantity by the ton or by the yard. Each product page has a calculator, and you pick a delivery date at checkout.
A dump truck tips the load in one pile on site. Deliveries cover Twin Falls, Kimberly, Buhl, Filer, Hansen, Castleford, Murtaugh and Rogerson.
Have the drop spot clear and reachable before the truck arrives. Bulk material arrives as one tipped pile, so plan where that pile should sit.
Questions About Ordering Road Mix and Stone
Should I order material by the ton or by the yard?
Both work, and the choice is yours at checkout. Tons suit material sold by weight, and yards suit material measured by volume.
Each product page has a calculator to help you settle on a quantity before you order.
Which stone is best for drainage in Twin Falls County?
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.
Where the soil over basalt is thin and tight, clean rock gives backed-up water a path.
What do I need to have ready for a bulk delivery?
Have the drop spot clear and reachable for a dump truck. The truck tips the load in one pile, so decide where that pile should sit before it arrives.
Order online, choose your quantity and pick a delivery date at checkout.
Size Your Load and Place Your Order
Start with the calculator on the product page for the material you need. It helps you settle on a quantity by the ton or by the yard, and you choose a delivery date at checkout.
Idaho Rock Supply delivers road mix, crushed rock, drain rock, sand, topsoil and more across Twin Falls County. Place your order online when you are ready.