Minnesota Department of Transportation

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Approved/Qualified Products

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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:  July 18, 2017

Prestressed Concrete Bridge Beams
Manufacturer Location
County Materials Corporation

*Janesville, Wisconsin

Roberts, Wisconsin

Forterra Pipe and Precast (formerly Cretex Concrete Products)

Elk River, Minnesota

*Iowa Falls, Iowa
Precast Concrete Box Culverts
Manufacturer Location
County Materials Corporation

Roberts, Wisconsin

Crest Concrete Products

*La Crescent, Minnesota

Forterra Pipe and Precast (formerly Cretex Concrete Products)

Elk River, Minnesota

Hawley, Minnesota

Hancock Concrete Products

Cannon Falls, Minnesota

Hancock, Minnesota

Wieser Precast Concrete Products

Maiden Rock, Wisconsin
Light Bases
Manufacturer Location

Hardrives, Inc.

St. Cloud, Minnesota

Pipe and Manhole Plant Pre-Approval Program
Manufacturer Location

County Materials Corp.

Roberts, Wisconsin

Marathon, Wisconsin (apron sections only)
Holmen, Wisconsin (products mfd. after June 30, 2017)

Forterra Pipe and Precast (formerly Cretex Concrete Products)

Elk River, Minnesota
Hawley, Minnesota
*Humboldt, Iowa
*Mitchell, South Dakota

Shakopee, Minnesota

Stacey, Minnesota

Hancock Concrete Products

Cannon Falls, Minnesota
Courtland, Minnesota

Hancock, Minnesota

*Sioux Falls, South Dakota

Hardrives, Inc.

St. Cloud, Minnesota

Wieser Precast Steps

Stewartville, Minnesota (manholes only)
Noise Wall Systems

See the Walls (retaining and noise) page for more information.

Noise Wall Posts (generic wood-faced noise barriers)
Manufacturer Location

Wieser Precast Concrete Products

Maiden Rock, Wisconsin

Three-Sided Precast Concrete Bridge Structures

See the Bridge Products page for more information.

Drycast Walls (small block)

See the Walls (retaining and noise) page for more information.

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

See Walls (retaining and noise) page for more information.

Edge Drain Headwalls
Manufacturer Location

Horsmann Precast

Finlayson, Minnesota

Wieser Precast Steps

Stewartville, Minnesota

Willmar Precast

Willmar, Minnesota