Garrison Oak 1.5-Million-Gallon Composite Elevated Water Storage Tank – Foundation & Infrastructure Construction

Key Accomplishments

Johnston Construction Company

• Performed foundation-related excavation, site preparation, structural backfilling, and compaction activities in accordance with CB&I's engineering requirements and the project's geotechnical specifications.
• Furnished and installed concrete flooring within the base of the elevated tank structure, together with associated concrete construction and installation of CB&I-supplied structural anchorage components.
• Installed 16-inch ductile iron water distribution piping, including associated valves, hydrants, fittings, thrust blocks, and connections required to integrate the elevated storage tank with the municipal water distribution system.
• JCC's scope included furnishing the tank facility's control room and coordinating its structural, architectural, mechanical, electrical, and operational infrastructure.
• Undertook electrical construction responsibilities involving power distribution, panelboards, raceways, wiring, grounding, lighting, electrical equipment connections, and supporting control systems.
• Coordinated the installation of SCADA and remote telemetry infrastructure, including provisions for communicating water levels, operating conditions, and alarms to the City of Dover's central monitoring system.
• Provided for HVAC installation, electrical heating, and associated building systems required to support the tank facility's enclosed operational areas.
• Completed contracted site improvements involving clearing, grading, erosion and sediment controls, asphalt paving, fencing, drainage provisions, and restoration of disturbed areas surrounding the elevated water storage tank.
• Coordinated construction quality-control requirements, water piping testing and disinfection, equipment integration, and project closeout documentation associated with the municipal water storage facility.
• The Project Was Completed On December 31, 2016.

Concrete Services Division

• Concrete Services Division, LLC (CSD) served as Trade Subcontractor to Johnston Construction Company for specialized concrete foundation construction associated with a 1.5-million-gallon composite elevated water storage tank at Garrison Oak Technical Park in Dover, Delaware.
• Performed concrete forming operations for the elevated tank foundation, including footings, slabs-on-grade, and curved foundation walls designed to accommodate the circular configuration of the composite elevated tank structure.
• CSD's contracted work included approximately 1,361 square feet of curved foundation wall formwork, incorporating form installation, alignment, bracing, and subsequent removal.
• Provided concrete placement services for approximately 255 cubic yards of foundation concrete, including an estimated 216 cubic yards associated with the foundation wall and approximately 39 cubic yards associated with footings and slabs-on-grade.
• Undertook reinforcing steel placement activities, including reinforcement handling, placement labor, and coordination with the foundation's specified structural reinforcement requirements.
• Performed concrete screeding, floating, surface finishing, pointing, and patching, with the subcontract identifying approximately 1,505 square feet of float and screed work and 1,361 square feet of pointing and patching.
• Coordinated concrete curing and protection activities, including approximately 3,147 square feet of contracted curing work, together with winter protection labor and placement coordination.
• Installed vapor barrier materials associated with concrete foundation construction, with approximately 1,396 square feet of vapor barrier work identified in the subcontract's construction estimate.
• Coordinated concrete pumping, concrete testing activities, construction equipment utilization, and material handling with Johnston Construction Company to support foundation construction operations.
• Performed specialized concrete construction services in accordance with the project's reinforced concrete, formwork, placement, finishing, and quality-control requirements established by Chicago Bridge & Iron and the project specifications.
• The Project Was Completed On December 31, 2016.

Electrical Services Division

• Electrical Services Division, LLC (ESD) served as Trade Subcontractor to Johnston Construction Company for the electrical construction associated with the 1.5-million-gallon Garrison Oak Composite Elevated Water Storage Tank in Dover, Delaware.
• ESD's contracted scope included furnishing and installing a 100-amp electrical service, providing the power infrastructure required for the elevated water storage tank facility and its associated operating equipment.
• Furnished and installed Panelboard LP, incorporating circuit protection, electrical distribution equipment, and associated connections supporting the facility's power requirements.
• Undertook conduit and electrical wiring installations, with the subcontract identifying approximately 1,630 linear feet of conduit and 6,850 linear feet of wiring in the contracted estimate.
• Installed facility lighting infrastructure, including specified lighting fixtures, switches, receptacles, electrical boxes, and associated wiring devices.
• Provided electrical surge protection as part of the facility's power distribution infrastructure, including procurement of a transient-voltage surge suppression system.
• ESD's scope included installing designated CB&I-supplied instrumentation, including specified roof-mounted instruments associated with the elevated water storage tank's monitoring systems.
• Coordinated electrical equipment procurement, shop drawing submissions, material deliveries, and approved equipment selections, including revisions to the panelboard configuration during the construction process.
• Supported electrical inspection, testing, and startup coordination in accordance with project specifications and the requirements of Johnston Construction Company and Chicago Bridge & Iron.
• The Project Was Completed On December 31, 2016.