Minnesota Department of Transportation

511 Travel Info

Approved/Qualified Products

Precast Concrete Products & Qualified Suppliers

Precast concrete manufacturing plants not shown or preceded by an asterisk (*) have no regular inspection by or for MnDOT. All costs of arranging for and providing inspection at plants without regular MnDOT inspection may be deducted from monies paid to the Contractor. See project Special Provisions.

Date of last revision:  April 28, 2020

Prestressed Concrete Bridge Beams

Manufacturer Location
County Materials Corporation Roberts, Wisconsin
Forterra (formerly Cretex Concrete Products) Elk River, Minnesota

Precast Concrete Box Culverts

Manufacturer Location
Crest Precast Concrete *La Crescent, Minnesota
Forterra (formerly Cretex Concrete Products) Elk River, Minnesota
Hancock Concrete Products Cannon Falls, Minnesota
Hancock, Minnesota
Wieser Concrete Maiden Rock, Wisconsin

Light Bases

Manufacturer Location
Amcon Concrete Products St. Cloud, Minnesota

Pipe and Manhole Plant Pre-Approval Program

Manufacturer Location
County Materials Corporation Roberts, Wisconsin
Marathon, Wisconsin (apron sections only)
Holmen, Wisconsin (products mfd. after June 30, 2017)
Forterra (formerly Cretex Concrete Products) Elk River, Minnesota
Hawley, Minnesota
Stacy, Minnesota
Hancock Concrete Products Cannon Falls, Minnesota
Courtland, Minnesota
Hancock, Minnesota
Amcon Concrete Products St. Cloud, Minnesota
Wieser Precast Steps Stewartville, Minnesota (manholes only)

Noise Wall Systems

Noise Wall Posts (generic wood-faced noise barriers)

Manufacturer Location
Wieser Concrete Maiden Rock, Wisconsin
Forterra (formerly Cretex Concrete Products) Elk River, Minnesota

Three-Sided Precast Concrete Bridge Structures

Drycast Walls (small block)

Mechanically Stabilized Earth (MSE) Walls (large block and wall panels)

Edge Drain Headwalls

Manufacturer Location
Horsmann Precast Finlayson, Minnesota
Wieser Precast Steps Stewartville, Minnesota
Willmar Precast Willmar, Minnesota