Little Patuxent 2 MG Elevated Water Storage Tank

Key Accomplishments

Concrete Services Division

• Concrete Services Division, LLC performed the concrete forming and placement work for the Little Patuxent Elevated Water Storage Tank project in Laurel, Maryland.
• CSD’s scope included furnishing labor, material, tools, supervision, and coordination required for forming and concrete placement of the tank foundation, tank slab, and tank walls.
• CSD’s work was performed in accordance with Specification Section 03300 Cast-in-Place Concrete, Specification Section 13210 Elevated Storage Tank, Ramboll Little Patuxent Elevated Storage Tank plans, and the CBI foundation design sketch.
• CSD’s scope included concrete forming, slab-on-grade forming, curved wall forming, slab placement, wall placement, float / screed work, troweling, point and patch, bagging, curing, concrete accessories, and pipe pads.
• Major work included installation and stripping of forms, placement of concrete, finishing concrete, curing concrete, concrete accessory labor, winter protection labor, and coordination of concrete material, concrete testing, concrete pumping, and equipment provided by Johnston Construction Company.
• The work required coordination with Johnston Construction Company, Anne Arundel County, Ramboll, the elevated tank supplier, concrete suppliers, reinforcing steel suppliers, testing laboratory, concrete pumping services, and overall tank foundation construction sequencing.
• The overall project consisted of construction of a new 2,000,000-gallon elevated water storage tank and associated improvements. The project included site grading, concrete, paving, maintenance of traffic, erosion and sediment control, electrical, instrumentation, and ductile iron water main work.
• CSD’s scope included mobilization and demobilization of concrete equipment, tools, and supplies to and from the jobsite. The work also included rental of form material, purchase of form lumber, installation and stripping of forms, placement labor, finishing labor, finishing supplies, curing labor, curing supplies, and related concrete accessories.
• Concrete forming work included slab-on-grade forming and curved wall forming for the elevated water storage tank foundation system. CSD coordinated the forming work with Johnston Construction Company, the tank foundation requirements, embeds, sleeves, anchor bolts, reinforcing steel, and the overall tank construction sequence.
• CSD’s concrete accessory scope included labor for items such as premolded joint material, waterstop, caulk, and other concrete accessories, with material provided by Johnston Construction Company as noted in the subcontract. CSD also coordinated pipe pads and related concrete items required for the tank and associated piping.
• The subcontract included winter protection labor, with winter protection blankets and heaters provided by Johnston Construction Company. CSD coordinated placement and support of winter protection measures as required for concrete work.
• CSD coordinated reinforcing steel support items, including reinforcing steel placing labor, reinforcing steel placing supplies, unloading rebar labor, setting anchor bolts and sleeves, and related coordination items as required by the project and subcontract conditions.
• Johnston Construction Company provided concrete material, concrete pumping rental, concrete testing services, material handling equipment, and other project support items, while CSD coordinated the concrete material, testing laboratory, pumping services, rental equipment, and field execution of the concrete scope.

Electrical Services Division

• ESD’s scope included furnishing labor, materials, tools, supervision, and coordination required for the electrical work in accordance with the contract documents, Specification Sections 16000, Drawings E-1 through E-6, Addenda 1, 2, and 3, CB&I preliminary foundation drawings, and ESD proposal documents.
• ESD furnished and installed conduit, wire, connections, electrical gear, meter base, 100A Panel PP-1, TVSS, temporary service, labels, grounding, instrumentation conduit and wiring, and electrical excavation for the ground ring, electrical service, and telecom ductbank.
• ESD’s lighting scope included tank lighting, obstruction lighting, and related electrical connections for the elevated water storage tank.
• ESD installed electrical ground rods and connected the tank base at four locations for the lightning protection ground ring.
• ESD coordinated heat tracing power, instrumentation wiring, RTU and HVAC wiring, startup assistance, testing, submittals, O&M manual review, material coordination, rental equipment coordination, and as-built / record drawings.
• The work required coordination with Johnston Construction Company, Anne Arundel County, Ramboll, the tank manufacturer, equipment suppliers, testing services, and other trades working on the tank, foundation, site, water main, and instrumentation systems.
• The overall project consisted of construction of a new 2,000,000-gallon elevated water storage tank and associated improvements. The project included site grading, concrete, paving, maintenance of traffic, erosion and sediment control, electrical, instrumentation, and ductile iron water main work.
• ESD’s work included furnishing all labor, materials, tools, supervision, coordination, and electrical construction services required for the Little Patuxent elevated water storage tank electrical scope. The electrical work was performed in accordance with the contract documents, electrical specifications, electrical drawings, addenda, CB&I preliminary foundation drawings, and subcontract requirements.
• The electrical scope included conduit, wire, and connections for the elevated water storage tank and associated electrical systems. ESD furnished and installed electrical gear including the meter base, 100A Panel PP-1, and TVSS.
• ESD’s lighting work included tank lighting and obstruction lighting. The lighting package included Type A, Type B, Type C, Type X, and Type W fixtures, along with the obstruction light package required for the elevated tank.
• The grounding and lightning protection support scope included installation of electrical ground rods and connection to the base of the tank at four locations for the lightning protection ground ring. ESD also coordinated with the tank manufacturer for downleads to be connected to the ground ring at the base of the tank.
• The underground electrical scope included excavation for the ground ring, electrical service, and telecom ductbank. The ductbanks were installed as direct-bury ductbanks per the project details and addendum clarification.