Profile: St. Regis Culvert, Inc. is a manufacturer of steel products. Our brands include Dura Flow™ and Max Flow™. Our products include corrugated steel pipe, corrugated steel pipe fabrication, corrugated steel pipe end treatments, guardrail, water control gates, structural plate, steel bridges and snowplow blades. We carry a wide variety of profiles and steel thickness in standard carbon or special heat-treated. We also furnish carbide insert, rotating tooth gravel blades, wear parts, curb runners and end bits.