Abstract: A modular hopper assembly is provided and includes a plurality of pre-fabricated upper hopper modular units, a plurality of pre-fabricated middle hopper modular units, a plurality of pre-fabricated lower hopper modular units and a plurality of support members configured as a base, where the upper hopper modular units, the middle hopper modular units and the lower hopper modular units are each assembled, and then the assembled upper hopper modular units, the assembled middle hopper modular units and the assembled lower hopper modular units are connected together to form a hopper, where the hopper is mounted on the base.