Lewes 1 MG Elevated Water Storage Tank

Key Accomplishments

Johnston Construction Company

• Coordinated pile installation, geotechnical oversight, static-load testing, foundation excavation, reinforcing steel, concrete placement, backfill, and final slab construction.
• Furnished and installed the interior piping serving the elevated tank, including piping connections and appurtenances required for complete tank operation.
• Installed the buried water-main system, wet-tap connection, fire hydrant, and associated valves and fittings.
• Furnished and installed a tank-overflow Tideflex valve and coordinated the overflow connection with the tank manufacturer.
• Installed a concrete access ramp and an overflow swale with riprap protection.
• Furnished and installed electrical ductbanks, conduit, conductors, distribution equipment, lighting, receptacles, obstruction lighting, grounding, and equipment connections.
• Provided electrical power and control infrastructure for the tank systems, instrumentation, motor-operated equipment, and site facilities.
• Furnished and installed instrumentation and controls associated with the tank, including the control panel and coordination with the Owner’s SCADA system.
• Installed unit heaters and a sump pump within the base of the elevated storage tank.
• Installed a suspended drop ceiling within the base of the tank and coordinated ceiling support requirements with CB&I.
• Coordinated construction sequencing with the elevated-tank erection, coating, electrical, controls, piping, and site-work activities performed by the various project participants.
• Johnston Construction Company performed the civil, mechanical, electrical, and instrumentation scope for the Lewes Elevated Storage Tank project in Lewes, Delaware.

Concrete Services Division

• Concrete Services Division, LLC performed the concrete forming, placement, finishing, and curing work associated with the new Lewes Elevated Storage Tank.
• Performed concrete work for the elevated-tank foundation, floor slab, door-access ramp, pipe-support pads, and transformer pad.
• Installed and stripped the formwork required for the tank foundation, including slab-on-grade forms, curved-wall forms, and straight-wall forms.
• Coordinated the placement of approximately 106 cubic yards of concrete for the foundation and associated structures.
• Formed approximately 792 square feet of curved foundation wall and approximately 36 square feet of straight-wall construction.
• Formed approximately 64 square feet of slab-on-grade construction for the tank foundation and related concrete improvements.
• Placed concrete for the tank foundation walls and slab-on-grade areas in accordance with the tank-foundation drawings and project specifications.
• Floated and screeded approximately 805 square feet of concrete surfaces.
• Performed pointing and patching of approximately 828 square feet of formed concrete surfaces.
• Installed concrete accessories including premolded joint material, waterstops, caulking, and related components furnished by Johnston Construction Company.
• Coordinated reinforcing-steel placement, unloading of reinforcing materials, setting of anchor bolts, and installation of embedded items when requested by JCC.
• Constructed three concrete pipe pads and installed twenty dowels associated with the concrete work.
• Coordinated concrete deliveries, concrete-pumping services, testing-laboratory activities, and construction equipment provided by Johnston Construction Company.
• Performed winter-protection labor and coordinated the placement of blankets and heaters furnished by JCC when required.

Electrical Services Division

• Electrical Services Division, LLC performed the electrical construction associated with the new Lewes Elevated Storage Tank.
• Furnished the labor, materials, tools, equipment, and supervision required for the electrical work included in Divisions 16 and 17 of the project specifications.
• Installed conduit, conductors, boxes, wiring devices, supports, terminations, and electrical equipment connections throughout the tank site.
• Furnished and installed the electrical-service equipment, including the utility meter, 200-amp main circuit breaker, 200-amp Panel PP1, surge-protection device, disconnects, and Hand-Off-Automatic switch.
• Installed the main electrical disconnect rack and coordinated its location with the tank, underground utilities, and site improvements.
• Furnished and installed twelve Type A fixtures, one Type B fixture, four pole-mounted Type SA site lights, and one obstruction-lighting system with its associated panel.
• Constructed the concrete bases required for the exterior site-lighting poles.
• Installed electrical grounding and bonding, including a grounding ring, ground rods at four locations, and connections to the base of the elevated tank and main disconnect rack.
• Installed six 6-inch conduits through the tank foundation for future antenna-related use.
• Installed a 2-inch conduit extending up the tank for the antenna cable furnished by others.
• Performed trenching, excavation, and backfilling required for the electrical service, grounding ring, gate-related conduit, site lighting, and other electrical raceways within ESD’s scope.
• Coordinated direct-buried conduit and underground electrical routing with Johnston Construction Company’s grading, water-main, stormwater, paving, and site-restoration work.
• Installed low-voltage power conductors, control-voltage cables, raceways, boxes, wiring devices, circuit protection, panelboards, and lighting systems in accordance with the project specifications.
• Coordinated electrical connections with equipment and materials furnished by Johnston Construction Company, CB&I, the utility provider, and other project participants.