A portable barrier installation system and release mechanism is provided. A support frame comprising a first support arch is coupled on each end to a first and second support base. A second support arch, parallel to the first support arch, is coupled on each end to the first and second support base. A hopper assembly is coupled to the support frame. Rotation of the hopper assembly causes the hopper assembly to be in a fill or storage position. A release mechanism facilitates the release and placement of filled bags.