Holliday Rock has been the leading independent supplier of asphalt, aggregates, and ready-mix concrete in the USA for more than 85 years. With its presence in 39 locations, Holliday manages a widespread network of facilities which includes 7 aggregate plants, 5 hot mix asphalt plants, and 39 ready-mix concrete plants. These sites service the counties of San Bernardino, Los Angeles, Orange, Kern, Ventura, San Luis Obispo, and Santa Barbara.