HMMI is a one-stop-shop manufacturing facility for large and heavy steel products. From fabrication, welding, machining and p ... ainting to complete assembly of large and heavy products, our highly-trained professionals can produce and deliver products to meet your unique needs. Centrally located in Huron, South Dakota, our 100,000-square-foot facility includes an expansive indoor steel storage space which enables us to keep a large selection of raw material on-hand to quickly meet the changing needs of today’s build-to-demand market while a variety of inventory control options minimizes inventory floor time, ensuring your delivery needs are met. Our large facility enables us to store your frequently used parts, enabling us to dramatically shorten lead times. read more