Butterfly Lane 1,000,000-Gallon Composite Elevated Water Storage Tank

Key Accomplishments

Johnston Construction Company

• The company performed mobilization, site preparation, erosion and sediment control, clearing, grading, excavation, backfill, and restoration required for the new tank facility.
• JCC completed the excavation and supporting civil work associated with the specialized composite-tank foundation.
• The company coordinated foundation construction with Caldwell Tanks’ design, reinforcement, anchor-bolt, pedestal, and tank-erection requirements.
• JCC performed mechanical piping and valve work associated with the elevated-tank inlet, outlet, overflow, drain, and distribution-system connections.
• The company installed the altitude valve and associated piping, valves, controls, and appurtenances required to regulate tank filling and operating water level.
• JCC performed underground water-main construction and connected the new tank facility to the City of Frederick’s existing water-distribution system.
• The company installed sanitary sewer, storm sewer, drainage piping, catch basins, and associated utility appurtenances.
• JCC constructed stormwater-management improvements and coordinated drainage around the tank foundation, access areas, and surrounding site.
• The company performed electrical, instrumentation, and control work supporting operation and monitoring of the new elevated water tank.
• JCC installed raceways, conductors, boxes, electrical equipment, control panels, instrumentation wiring, grounding, lighting, and associated electrical components within its scope.
• The company coordinated the new programmable logic controller, remote terminal unit, tank-level monitoring, alarms, controls, and communication systems with the City’s existing monitoring infrastructure.
• JCC performed water-quality instrumentation work supporting monitoring of the completed water-storage facility.

Concrete Services Division

• Concrete Services Division performed the concrete-forming, placement, finishing, and curing work supporting construction of the Butterfly Lane Water Storage Tank.
• CSD furnished the labor, form materials, form lumber, tools, concrete-finishing supplies, curing supplies, and supervision required for its assigned work.
• The company performed concrete work supporting the new one-million-gallon composite elevated water-storage tank constructed for the City of Frederick.
• CSD formed and placed the reinforced-concrete tank foundation, including the footing and curved-wall portions of the specialized composite-tank structure.
• The company formed and placed the interior floor slab within the base of the elevated-tank support pedestal.
• CSD’s assigned scope also included the tank derrick slab, if required by the construction sequence.
• The company constructed the tank overflow pad used to protect the surrounding area from erosion during tank-overflow events.
• CSD formed and placed one concrete pipe pad supporting the project’s permanent process-piping system.
• The company installed and stripped footing, slab-on-grade, and curved-wall formwork.
• CSD placed approximately 211 cubic yards of concrete across the assigned foundation, wall, slab, overflow-pad, and pipe-pad components.
• The company completed floating, screeding, machine troweling, pointing, patching, curing, and protection of completed concrete surfaces.
• CSD set anchor bolts, dowels, and mesh included within its subcontract scope.
• The company installed concrete-accessory items, including premolded joint material, waterstops, caulking, and associated joint components.
• CSD coordinated concrete deliveries, testing-laboratory services, concrete-pumping services, and equipment rentals provided through Johnston Construction Company.

Electrical Services Division

• Electrical Services Division performed the electrical work supporting construction of the new one-million-gallon Butterfly Lane Water Storage Tank.
• ESD furnished the labor, electrical materials, tools, equipment, supervision, mobilization, and field services required for its assigned work.
• The company installed electrical service and distribution equipment serving the elevated water-storage tank and associated operating systems.
• ESD furnished and installed panelboards, disconnect switches, motor-starting equipment, circuit breakers, transformers, contactors, and related electrical components.
• The company installed electrical raceways, conductors, boxes, devices, fittings, supports, and wiring serving the tank’s electrical and mechanical systems.
• ESD installed tank-interior and exterior lighting required for safe inspection, operation, and maintenance of the facility.
• The work included utility-meter and service-disconnect equipment associated with the permanent electrical service.
• ESD installed grounding and bonding systems for the tank’s electrical equipment, raceways, panels, and associated components.
• The company installed heat-trace wiring and related electrical connections supporting freeze protection of the tank’s piping and equipment.
• ESD provided electrical power and connections for the tank’s HVAC equipment, including fans, heaters, and associated controls.
• The company installed power and control wiring supporting process valves, tank-level monitoring, water-quality instruments, and related operating systems.
• ESD installed electrical ductbanks and underground raceways between the utility source, tank structure, and project equipment.
• The company furnished and installed conduits required for the antenna system, including the specified six-inch antenna-conduit runs.
• ESD coordinated conduit penetrations and raceway routing with the tank foundation, concrete pedestal, mechanical piping, and site utilities.