Sioux Erosion Control

Sioux Erosion Control is an Oklahoma company in the erosion-control trade. Highway jobs need that work: sod, mats, and related measures that keep soil from washing off a road project. The customers are public. The money is highway funding. Contracts are supposed to be awarded on bids.

In August 2026 a federal jury convicted the company, a vice president, and an employee. The conspiracy the jury found had run for five years. It fixed prices, allocated territories, and rigged bids on more than $100 million in publicly funded highway-related contracts. Allocating territory means the rivals split the map. Rigging the bid means the designated loser either bids high or stays away.

The library status is ongoing because sentencing was still pending after the August 2026 verdict. This profile does not describe a sentence. None had been imposed yet. The conviction is the jury's finding. The punishment is a later hearing.

Public highway contracts are the market, so the overcharge is a taxpayer cost.

The three convicted parties at trial were the company, a vice president, and an employee.

Price fixing, territorial allocation, and bid rigging are the three parts of the conspiracy the jury accepted.

State and local road authorities thought they were taking competitive bids for erosion control.

A neighboring contractor who was told to stay out of a county lost the work, and the public lost the second price.