King Kennedy Water System Replacement – Ground Storage Tank & Water Booster Station

Key Accomplishments

Johnston Construction Company

• JCC’s scope included construction of a new precast concrete treatment / booster station building, 40,000-gallon glass-lined bolted steel ground storage tank, 6,000-gallon hydropneumatic tank, two in-line water booster pumps, chlorine chemical feed system, process piping, valves, fittings, appurtenances, electrical systems, controls, instrumentation, and site improvements.
• The work included demolition of the existing King Kennedy Water Booster Station and construction of new facilities while maintaining the existing water system in operation.
• Major utility work included installation of 8-inch and 4-inch mechanical joint ductile iron pipe, fittings, valves, hydrant assemblies, temporary water service provisions, testing, chlorination, disinfection, and connection to the existing King Kennedy Water System.
• Site work included clearing and grubbing, excavation, trenching, backfill, dewatering, erosion and sediment control, gravel pad, stone base, fencing, gate, restoration, turf establishment, and cleanup.
• Johnston Construction Company completed the King Kennedy Water System Replacement – Ground Storage Tank & Water Booster Station project in Mechanicsville, Maryland. The project was completed for St. Mary’s County Metropolitan Commission at the King Kennedy Estates water system site located at 40725 King Drive.
• The project consisted of replacing the existing King Kennedy water booster station with a new water booster station and ground storage tank facility. The new facility included a precast concrete building, water booster pumps, glass-lined bolted steel ground storage tank, hydropneumatic tank, chemical feed system, process piping, valves, electrical systems, controls, instrumentation, and related site improvements.
• JCC coordinated the overall construction effort, including mobilization, submittals, schedule management, site layout, erosion and sediment controls, temporary facilities, demolition, excavation, trenching, water main installation, mechanical installation, electrical and control work, startup, commissioning, record drawings, O&M manuals, testing, disinfection, restoration, and closeout.
• The new water facility included a 40,000-gallon ground storage tank, 6,000-gallon hydropneumatic tank, two in-line water booster pumps, chlorine chemical feed system, and associated piping and appurtenances required to connect the new facility to the existing King Kennedy Water System.
• Building work included construction of the new precast concrete booster station building, including cast-in-place concrete, concrete reinforcement, precast concrete building components, hollow metal doors and frames, door hardware, miscellaneous metals, painting, plumbing, ventilation, unit heaters, louvers, and building systems required for a complete operating facility.
• Mechanical work included booster pumping equipment, hydropneumatic tank, water piping, hangers and supports, valves, fittings, flow measurement, chemical pumping systems, chlorination equipment, plumbing, HVAC, ventilation equipment, and related appurtenances.
• Water main work included installation of 8-inch mechanical joint ductile iron pipe, 4-inch mechanical joint ductile iron pipe, fittings, valves, fire hydrant assemblies, water services, meter settings, vault coordination, testing, cleaning, and chlorination. The work also included connections to existing water lines and structures.
• Electrical work included electrical testing, grounding and bonding, raceways, fittings and supports, low voltage wire and cable, boxes, wiring devices, electrical controls and relays, transient voltage suppression, enclosed circuit breakers, automatic transfer switches, disconnect switches, panelboards, motor control center work, transformers, lighting, standby generator, and lightning protection.

Concrete Services Division

• Concrete Services Division, LLC performed the specialized structural and site concrete work associated with the King Kennedy Water System Replacement – Ground Storage Tank & Water Booster Station in Mechanicsville, Maryland.
• CSD furnished the labor, form materials, tools, finishing supplies, curing materials, concrete accessories, reinforcing-steel placement labor, and other resources required for its assigned concrete package.
• CSD’s work included concrete construction for the new booster-station building slab, hydropneumatic tank supports, pump pads, generator pad, building entrance pads, antenna foundation, equipment pads, and valve-box pads.
• The concrete package incorporated footing forms, slab-on-grade forms, column forms, footing placement, slab placement, column placement, floating and screeding, machine-trowel finishing, pointing and patching, floor hardener, curing, concrete accessories, reinforcing-steel placement, and equipment-pad construction.
• CSD’s subcontract included approximately 47 cubic yards of concrete-related work, including approximately 40.78 cubic yards of slab-on-grade placement, 3.46 cubic yards of footing placement, and 2.93 cubic yards of column placement.
• The forming package included approximately 541.67 square feet of slab-on-grade forming, 138.83 square feet of column forming, and 65.33 square feet of footing forming.
• CSD performed approximately 525 square feet of machine-trowel finishing, approximately 377.55 square feet of floating and screeding, and approximately 138.83 square feet of pointing and patching.
• CSD placed approximately 2.33 tons of reinforcing steel as part of the assigned concrete package.
• The subcontract also included concrete curing, concrete accessories, winter-protection labor, anchor-bolt setting, and sealing of the building concrete floor slab.
• CSD coordinated concrete purchased by JCC, testing-laboratory services, concrete pumping, and JCC or rental equipment used to support concrete-placement activities.
• CSD’s work supported construction of a new water-system facility incorporating a 40,000-gallon ground storage tank, hydropneumatic tank, two in-line booster pumps, chlorine chemical-feed system, precast concrete building, piping, valves, and associated appurtenances.
• Concrete Services Division, LLC performed the concrete portion of the King Kennedy Water System Replacement – Ground Storage Tank & Water Booster Station project at 40725 King Drive, Mechanicsville, Maryland 20659.
• The overall project was undertaken by the St. Mary’s County Metropolitan Commission to replace and upgrade the existing King Kennedy water-system facilities serving the surrounding King Kennedy Estates area.
• The project included construction of a new treatment and booster facility incorporating a 40,000-gallon ground storage tank, hydropneumatic storage, two in-line water booster pumps, chlorine chemical-feed equipment, a precast concrete building, new piping, valves and appurtenances, and connections to the existing King Kennedy Water System.