A Sierra Vista construction company is among four firms federal authorities have chosen to build models of a border wall made from materials other than concrete.
U.S. Customs and Border Protection has now given two Arizona companies contracts to build border wall prototypes, KWR Construction in Sierra Vista and Fisher Sand & Gravel in Tempe.
Federal officials previously announced that Fisher Sand & Gravel will build border wall prototypes out of concrete. KWR will use materials other than concrete to design and build models between 18 and 30 feet high. Companies from Alabama, Maryland and Mississippi were also tapped to build sample walls from alternate materials.
CBP did not say how much the alternate materials contracts are worth. Contracts for concrete prototypes are worth between $400,000 and $500,000.
Federal officials say they will meet with KWR and the other three firms to determine a timeline for construction. But they expect the prototypes will be finished this fall.