44th Street Water Treatment Plant Filter Rehabilitation

Key Accomplishments

Johnston Construction Company

• Installed new ductile-iron filter-face piping and new ductile-iron interconnecting piping between the filters and the existing influent and effluent manifolds.
• Furnished and installed electrically actuated butterfly valves for filter inlet, outlet, backwash, rinse, tank-drain, air-wash, and air-pressurizing service.
• Installed manual isolation valves, air-release valves, vent-isolation valves, pressure-gauge assemblies, and drain funnels for the filter systems.
• Replaced the existing filter-control arrangement with two new stainless-steel control panels serving Filter Banks A and B.
• Installed Modicon M580 programmable controllers, 12-inch touchscreen operator interfaces, Ethernet communications, redundant power supplies, surge protection, UPS backup, relays, terminal blocks, and related panel components.
• Coordinated programming for the filter controls and integration of the new panels with the existing plant SCADA system.
• Installed fourteen magnetic flowmeters serving the individual filter inlets.
• Installed two magnetic flowmeters serving the common filter-effluent piping.
• Removed two existing filter air blowers, associated air piping, appurtenances, and concrete equipment pads.
• Installed two new air blowers with sound enclosures, flexible connections, silencers, relief valves, pressure gauges, motors, check valves, and associated air piping.
• Constructed new concrete pads for the replacement air-blower equipment.
• Reused and upgraded existing motor-control-center buckets serving the new blower systems.

B & R Electrical Contractors

• B & R Electrical Contractors, Inc. performed the electrical construction associated with the rehabilitation of fourteen filters at the 44th Street Water Treatment Plant.
• Furnished the labor, materials, tools, equipment, and supervision required for the electrical work included in the project drawings, Division 16 specifications, and referenced Gorman Avenue Water Treatment Plant contract documents.
• Performed electrical demolition of existing conduit, conductors, junction boxes, controls wiring, and equipment connections affected by the filter rehabilitation.
• Reused existing electrical raceways, conductors, and connections where conditions permitted and replaced or extended them where required for the new filter equipment.
• Furnished and installed conduit, wiring, boxes, fittings, supports, terminations, and electrical connections for the fourteen rehabilitated filters.
• Furnished and installed fourteen stainless-steel junction boxes, with one junction box serving the wiring and controls associated with each filter.
• Installed electrical raceways and conductors serving the new electrically actuated filter valves.
• Coordinated electrical connections for the replacement filter-control panels serving Filter Banks A and B.
• Installed power feeds, conduit, wiring, supports, and field terminations between the new control panels and remotely located filter equipment.
• Coordinated connections for the new filter-inlet and common-effluent magnetic flowmeters where included within BRE’s electrical scope.
• Reused and upgraded the existing motor-control-center buckets serving the replacement filter air blowers.
• Installed electrical power and control connections for two new air blowers and associated equipment furnished by others.
• Coordinated blower wiring with the existing motor-control equipment, replacement control panels, and filter operating sequences.
• Installed conduit and wiring required for the chlorine-room CCTV improvements.