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 AASHTO re:source.
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.
District Materials, Soils, and 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.
Mn/DOT performs program oversight for electrical conductors, reinforcement steel and precast/prestressed concrete plants.
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)
Lab Manual No. 5-695
The lab manual outlines laboratory procedures used by Mn/DOT for materials testing.
Lab Testing and Inspection Rates
Sampling, testing, & inspections rates for State Agency, County, City and other governmentally funded transportation projects.