Minnesota Department of Transportation

511 Travel Info

Materials Lab Testing & Inspection

Asphalt mix on a towel

Lab Testing

Mn/DOT performs laboratory testing of materials for construction and maintenance projects, and research.

Mn/DOT Labs consist of ten District labs located in greater Minnesota, and a central facility that is part of the MnDOT Office of Materials and Road Research in Maplewood, Minnesota.

All Mn/DOT labs are accredited by AMRL.


Central Office Materials Labs

The central office materials labs perform specialized, as well as routine materials testing in its Maplewood facility. Each individual lab is led by a laboratory supervisor or a lead worker. The aggregate lab, soils & cement lab, and concrete & metals lab are under the direction of the Physical Testing Engineer, the chemical labs (analytical and asphalt binder) are under the direction of the Chemical Lab Director, the foundation lab is under the direction of the Foundations Engineer, and the bituminous lab is under the direction of the Bituminous Engineer.

Directory of central lab personnel.

District Materials Labs

The eight Mn/DOT districts perform routine project materials testing of bituminous, aggregates, and soils. Each laboratory is led by a laboratory supervisor, or lead worker under the direction of a District Materials Engineer.

Directory of district lab personnel.

Materials Inspection

Mn/DOT performs program oversight for electrical conductors, reinforcement steel and precast/prestressed concrete plants.

Directory of inspections personnel.


Lab Testing and Inspection Resources

Schedule of Materials Control

Minimum Sampling and Testing Requirements (project specific - visit the Schedule of Materials Control website for older versions)

2016 Schedule of Materials Control for 2016 standard specifications

2015 Schedule of Materials Control (use 2014 version) .

Lab Manual No. 5-695

The lab manual outlines laboratory procedures used by Mn/DOT for materials testing.

MnDOT Laboratory Manual.

Lab Testing and Inspection Rates

Sampling, testing, & inspections rates for State Agency, County, City and other governmentally funded transportation projects.

Lab Testing and Inspections Rates - Memo.

Current Rates: effective May 1, 2015.

Former Rates: thru April 30, 2015.