Residential Concrete Paving in Westminster, CO A M Concrete in the Denver Metro area is the premier concrete contractor. In business since 1975, we are the qualified choice in Denver for concrete repair and new pavement for residential and commercial projects. Weve had several repeat contracts with the city of Longmont because of our reputation. The choice is obvious if you need quality concrete paving, call A M Concrete.Some of things we specialize in include: driveways, sidewalks, patios garages, basement , curbs , gutters, and any and all residential/commercial paving projects.