Part of Colas USA, Sully-Miller Contracting Company is one of the premier road and highway contractors, rail & intermodal, se ... aport, airport, federal/military and specialty contractors in Southern California. You will not find a more integrated and versatile general contractor in the region. With an emphasis on Project Management, Sully-Miller self-performs over 50 percent of the work on all contracts. Sully-Miller Contracting is a highly capable partner, taking the reins of standard and complex civil projects by providing the following services: Procurement of raw materials and construction Project completion, ongoing operation and maintenance Sully-Miller Companies consist of Sully-Miller Contracting, United Rock and Blue Diamond Materials. Each company supports the other. Blue Diamond Materials provides the hot mix asphalt manufacturing, United Rock â the aggregate and Sully-Miller Contracting executes the projects. Accessibility to extensive resources and capabilities, enable Sully-Miller Contracting to handle a broad spectrum of projects. read more