Extruded flat aluminum cover systems designed to allow plant personnel walkable access from above are not limited to smaller size covers, as is evidenced by this large rectangular Hallsten cover system.
Phase 1 of The City of Turlock Regional Water Quality Control Facility Headworks and Secondary Treatment Capacity Expansion Project included a Hallsten extruded flat aluminum cover system over Equalization Basin No. 1. This large overhead truss supported Hallsten aluminum cover system was designed to enclose the entire basin and allow plant personnel walkable access from above. Sized at nearly an acre, this is the largest singular cover that Hallsten has produced to date.