The Preferred Source

Since the early 1900s Idaho Materials & Construction has built The Preferred Source of quality sand, rock, landscape products, ready-mixed concrete, asphalt, paving and construction services. We offer our customers the broadest range of quality products and services throughout Southern Idaho. We strive for excellence through our safe employees, world-class teams, breadth of innovative products and services, and commitment to sustainability.

Products & Services

Sand, Rock & Landscape Products

We offer a wide variety of specialty landscape rock products, sand, colored aggregates, rock mulches, trail chat, topsoil, mulch, and bark products.

Learn More

Ready-Mixed Concrete

We are experienced in designing and delivering specialty concrete mixes including fiber reinforced concrete, high-content fly-ash mixes, self-consolidating concrete, and pervious concrete pavement.

Learn More

& Paving

Asphalt is one of the most sustainable construction materials. Many of our projects have won quality awards.

Learn More

Construction Services

We specialize in highway and site development work. From small subdivisions to multi-million dollar highway and commercial projects, nothing is too large or small.

Learn More


  • John and his crew spent just over a week in …

    – John Lecy from Cornerstone Concrete (Stillwater, MN)

    Read More
  • A few weeks ago we donated a large rock to …

    – Thank you from Alameda Middle School

    Read More
  • I wanted to pass along a photo that was recently …

    – Photos shared by Cascade Operations employee John Stevenson

    Read More
  • My name is Bill Leaton and I’m the manager for …

    – “The reason for my letter is, Wow!!!”

    Read More

Featured Projects


February 16, 2018

Idaho Materials and Construction (IMC) won a Quality in Construction …

Photos shared by Cascade Operations employee John Stevenson

September 12, 2017

I wanted to pass along a photo that was recently …

300 North Project

August 18, 2015

Board of Commissioners Jerome Highway District Jerome, Idaho Dear Idaho …

State Route 45 Project

On behalf of the City of Nampa, I want to …