We Guarantee a Quality Product, Delivered Safely and On-Time! Knife River provides construction materials and contracting services in Central Texas. Servicing Burnet County and the surrounding areas. We are one of the nation's largest aggregate producers. We produce and sell aggregate for TxDOT, Commercial, and Residential projects. We are a full-service heavy civil contractor. We've got what you need to get your job done. From highways to driveways, Knife River delivers the construction materials and services you need.