About Us

Knife River in Sioux City, Iowa, is a leading provider of construction materials and services, offering aggregates, asphalt, ready-mix concrete, heavy-civil construction, and hauling across Siouxland. As part of Knife River Corporation, our division supports infrastructure across Iowa, Nebraska, and South Dakota.

We’ve long been a cornerstone of the regional construction industry, contributing to major community and transportation projects. Our Sioux City location operates with a strong commitment to quality, safety, environmental responsibility, and service excellence.

Products & Services We produce and deliver essential materials:

Aggregates: Sand, gravel, crushed stone

Asphalt: Recyclable paving solutions

Ready-Mix Concrete: Custom mixes for all project types

Construction Services: Site development, grading, paving

Trucking/Hauling: Reliable delivery across the region

With 112 power units and 36 drivers, we ensure timely service. Our paving and site development teams support roads, highways, and commercial projects with precision and care.

Our Values at Knife River Sioux City, our mission is shaped by four core values: People, Safety, Quality, and Environment. These principles guide every mile we pave and every partnership we build—empowering us to serve our communities with pride and purpose.