Heldenfels Enterprises provides pre-cast and pre-stressed concrete structures for highway and bridge construction. The company has two manufacturing plants in Texas, one in Corpus Christi and one in San Marcos, which produce construction materials, such as box beams, deck panels, double tees, I-beams, pre-cast pile caps, square and sheet piling, U-beams, column covers, pipe racks, spandrel panels, stair units, wall panels, seating risers, vomitory walls and rectangular beams. Heldenfels Enterprises maintains the Heldenfels presence in traditional construction markets highway, marine and industrial while it expands into new markets, such as athletic stadiums. The company s projects have included American Bank Center, Reliant Stadium, Minute Maid Field, SBC Center, the JFK Intercoastal Waterway Bridge, the Redfish Bay Relief Bridge, Indian Point Park Pier, Lexington Museum Approach and the Greenway Parking Garage. Heldenfels Enterprises is based in San Marcos, Texas.