Abstract: A cementious washout container includes a container body having a container reservoir. A hinged chute assembly is rotatably coupled with an upper portion of the container body. The hinged chute assembly includes a chute panel, and a hopper screen coupled with the chute panel. The hopper screen includes perforations overlying the container body. A container drain is positioned at a lower end of the container body, and a container valve is movably coupled over the container drain. The cementious washout container retains and stores washout water and fine particles from multiple loads of cement or concrete and consolidates the washout water and fine particles for a single delivery of the same without requiring multiple separate deliveries of these wastes in multiple trucks.