All metal culvert meet minimum MnDOT gauge requirements. We stock riveted corrugated galvanized steel culvert and connecting bands from 12" through 48" diameter, apron ends from 12" through 24", and can order larger diameters through 144". Spiral culvert is stocked in 8" only. We can also order arched steel, aluminized, arched aluminized, aluminum, polymer coated, and arched polymer coated culvert in all sizes. Fitting, basin, and structure fabrication is available. All culvert is manufactured by Metal Culverts, Inc., Albert Lea, MN.