Started in 1937 during the Great Depression, Holliday Rock has been a constant presence in the Southern California construction market for over seventy-fi ve years and is one of the largest independent producers of aggregate, ready mix concrete, and hot mix asphalt in the United States. Holliday operates 7 aggregate plants, 7 hot mix asphalt plants, and 27 ready mix concrete plants. These plants service San Bernardino, Riverside, Los Angeles, Orange, Kern, and Ventura Counties. Since 1937, Holliday has continued to maintain their roots and still remain 100% family owned and operated. Holliday has grown to become the largest independently owned and operated ready mix concrete producer in Southern California. Holliday currently employs over 600 people.