Ballenger Zone 2 1,000,000-Gallon Composite Elevated Water Storage Tank

Key Accomplishments

Johnston Construction Company

• The company excavated for the tank foundation, prepared the subgrade, placed the mud slab, formed and tied the structural footing, and completed the reinforced-concrete foundation placement.
• JCC formed and constructed the reinforced-concrete starter wall supporting Landmark Structures’ composite elevated-tank pedestal.
• The company coordinated installation of reinforcing steel, anchor bolts, sleeves, conduit boxouts, piping penetrations, link seals, and embedded components furnished or detailed by Landmark.
• JCC backfilled the exterior and interior of the foundation and prepared the completed foundation for construction of the concrete support pedestal.
• The company installed the slab-on-grade and exterior concrete improvements within and around the base of the elevated tank.
• JCC constructed the chemical feed room within the tank pedestal, including its curb, interior door, utility sink, emergency eyewash equipment, chemical piping, chlorine piping, and associated plumbing.
• The work included installation of a new 16-inch ductile-iron water main and connection to the existing 12-inch water main.
• JCC furnished and installed process piping, valves, an altitude-control valve, pipe supports, link seals, straps, miscellaneous metal components, insulated flanged joints, and sealants.
• The company installed the tank floor drain, site drainage system, drainage swales, check dams, overflow splash pad, riprap drainage protection, and associated grading.
• JCC completed electrical and instrumentation work associated with the tank, including tank lighting, grounding, heat-trace coordination, underground conduits, antenna conduits, and related system connections.
• JCC performed improvements at the existing Hannover Booster Pumping Station, including replacement of four pump impellers and associated work required to integrate the new storage facility with the County’s water system.
• The company completed asphalt paving, concrete aprons, sidewalks, curbs, fencing with mow strip, final grading, topsoil placement, seeding, landscaping, and site restoration.

Concrete Services Division

• Concrete Services Division performed the forming, placement, finishing, and curing of concrete supporting construction of Frederick County’s new 1.0-million-gallon composite elevated water storage tank.
• CSD furnished the concrete labor, formwork materials, tools, equipment, accessories, finishing supplies, and curing materials required for its assigned work.
• The company installed and stripped formwork for the elevated-tank footing, slab-on-grade, curved walls, columns, boxouts, and miscellaneous concrete components.
• CSD placed and consolidated concrete for the tank foundation and associated structural and site improvements.
• The work included forming and concrete placement for the tank’s circular foundation and starter-wall components supporting the concrete pedestal and elevated steel water-storage bowl.
• CSD formed and placed slab-on-grade areas within and around the base of the elevated-tank structure.
• The company completed concrete aprons, walkways, mow strips, splash blocks, pipe-support pads, and riser-support components.
• CSD performed floating, screeding, troweling, pointing, patching, bagging, and final concrete-surface finishing.
• The company installed mesh and dowels included within its subcontract and coordinated reinforcing steel furnished and installed by others.
• CSD installed concrete accessories such as waterstops, joint materials, caulking components, and other items furnished by Johnston Construction Company.
• The company coordinated anchor-bolt setting with JCC and the tank contractor before concrete placement.
• CSD coordinated concrete deliveries, concrete-pump services, testing services, rental equipment, inspections, and placement schedules with Johnston Construction Company.
• The work included curing and protection of completed concrete, including labor associated with winter-protection measures when required.
• CSD completed concrete repairs, pointing, patching, surface treatment, cleanup, and protection of its completed work.