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Office of Materials & Road Research
E-mail:
MaterialsLab.DOT@state.mn.us
1400 Gervais Avenue
Maplewood, MN 55109-2044
Phone: (651) 366-5592
FAX: (651) 366-5461
© 2026 Minnesota Department of Transportation
395 John Ireland Boulevard
St. Paul, MN 55155-1899
Phone: 800/657-3774
800/627-3529(TTY, Voice, ASCII)
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Last Updated: Thursday, March 26, 2026 - 3:48:05 p.m. Central Daylight Time