Ocean City 1st Street 1.0 MG Elevated Water Storage Tank

Key Accomplishments

Johnston Construction Company

• Installed and maintained erosion and sediment controls throughout JCC's work and coordinated site drainage, groundwater control and temporary measures necessary to maintain suitable construction conditions.
• Performed the project's required site surcharge program to address anticipated settlement and down-drag conditions prior to installation of the permanent tank foundation.
• The geotechnical design called for a temporary surcharge over the tank footprint to preload the underlying soils prior to pile installation, including settlement monitoring and controlled removal after the required consolidation had occurred.
• Provided the augered pressure grouted pile foundation supporting the elevated tank ringwall, with Berkel & Company Contractors identified as JCC's specialty pile subcontractor.
• Foundation criteria required APG piles extending to approximately 76 feet below grade, terminating in the site's very dense sand layer. Design options included 14-inch and 16-inch piles, together with required static pile-load testing.
• Coordinated pile load testing, pile installation records and grout-break testing as part of foundation quality assurance and documentation.
• Installed CB&I-furnished foundation anchor bolts and constructed the concrete floor and pipe-support systems located within the base of the tank.
• Performed concrete and geotechnical testing and furnished associated test reports required to document compliance with the project requirements.
• Furnished and installed the project's floor-drain piping system.
• Furnished and installed piping, valves, fittings, pipe supports and thrust blocks from the limits of the 16-inch water main through the 16-inch inlet/outlet base tee, integrating the tank with the municipal water distribution system.
• Furnished and installed the precast overflow structure and associated overflow piping.
• Furnished and installed the project's packaged simplex booster-pump system, including associated mechanical, electrical and control integration.

Concrete Services Division

• Served as Trade Subcontractor to Johnston Construction Company for the concrete portion of the Town of Ocean City's 1st Street Elevated Water Storage Tank project.
• Furnished the labor, materials, tools and supervision necessary for concrete forming, placement, finishing and curing in accordance with the project structural and mechanical drawings, applicable specifications and project addenda.
• Completed an approximately 286-cubic-yard concrete package supporting the new elevated water-storage tank site and associated structures.
• Constructed concrete retaining-wall footings and retaining walls, including extensive formwork, placement, finishing and curing operations.
• Installed 146 dowels for retaining-wall coping and completed associated concrete support work for the retaining-wall system.
• Formed and placed 24 fence-post pilasters and completed grout work at the tops of the pilasters as part of the site's permanent fencing improvements.
• Constructed the equipment-shelter foundation system, including wall footings, a communication shelter pad and concrete support walls.
• Completed concrete work for the shelter's stair footings, stair-support walls, stairs and landing, integrating the relocated equipment shelter with the finished tank site.
• Formed and placed the primary tank pile cap, providing a major structural concrete component associated with the elevated-tank foundation system.
• Constructed the interior tank floor slab and performed grout fill within the tank interior as required by the structural details.
• Constructed multiple concrete supports for the tank's process and distribution piping, including six pipe-support footings within the slab, four spread-footing pipe supports and ten additional pipe supports.
• Constructed 20 ice-bridge post foundations, providing structural support for the tank site's ice-bridge assemblies.
• Performed a broad range of concrete-forming operations including footings, slabs-on-grade, curved walls, straight walls, columns, special forms, boxouts and retaining walls.
• Performed concrete placement for footings, slabs, walls, columns, special structures, fill and grout, along with the associated finishing and curing work.