Maryland Portable Concrete, Inc. produces ready-mixed concrete and related construction materials through plants in Harford and Cecil counties. Founded in 1980 by siblings Marty and Carolyn Hamilton after the family’s earlier mobile-mixer operation, it remains family-owned and operated, with Gregory White as president and sole owner since 2016. The company reports a fleet of more than 140 vehicles and serves customers across parts of Maryland, Delaware, and Pennsylvania.
Schuster ConcreteSchuster Concrete is a Maryland-based ready-mixed concrete producer that began in 1985, when founder Daniel G. Schuster built a batch plant in Owings Mills to supply his construction projects and other customers. It now operates eight stationary plants and a fleet of portable plants, producing custom mixes for projects across Maryland and neighboring states.OWINGS MILLS, MD
Carruth & Son ConcreteFounded in 1976, family-owned and operated Carruth & Son Concrete supplies ready-mix concrete for projects large and small. The company produces ready-mix concrete and repurposes returned and leftover concrete into recycled materials at its southern Maryland plants, serving customers in Charles, Saint Mary’s and Calvert counties and parts of northern Virginia.WALDORF, MD
Gillespie & Son, IncFounded in 1922, Gillespie & Son is a fifth-generation, family-run concrete manufacturer and building-supply business based in Chestertown on Maryland’s Eastern Shore. It produces ready-mix concrete and precast products, serving Maryland and Delaware; its separate Gillespie Precast affiliate distributes to the broader Mid-Atlantic region. The company describes an operation that includes a concrete plant, precast facilities, warehousing, offices, and a builder’s supply store.CHESTERTOWN, MD
Hanover Concrete, CoEstablished in 1940, Hanover Concrete, Co. is a family-owned concrete producer and building-materials supplier based in Hanover, Pennsylvania. It manufactures ready-mixed concrete and fabricates reinforcing steel in-house, and has expanded to serve south-central Pennsylvania and northern Maryland through its Hanover, Shrewsbury, and Gettysburg operations.HANOVER, PA