Collington Elevated Water Storage Facility – Waterline Testing & Valve Installation

Key Accomplishments

• Installed 6-inch gate valves and associated blow-off and hydrant appurtenances at designated locations along the project waterline.
• Furnished and installed required materials and performed pressure testing of approximately 1,155 linear feet of 24-inch water main from STA 0+00 to STA 11+55.
• Performed water-main testing in accordance with WSSC requirements, including hydrostatic pressure testing, leakage testing, advance coordination with the Engineer and use of required test instrumentation.
• Worked under WSSC testing criteria requiring the hydrostatic pressure test to be maintained for a minimum of two hours, followed by leakage testing in accordance with the applicable project requirements.
• Coordinated water-main testing with the project's applicable chlorination requirements, including provisions for chlorination to occur in conjunction with hydrostatic testing unless otherwise approved by the Engineer.
• Performed required backfill, compaction and compaction testing associated with JCC's valve and pipeline work in accordance with the project's pipeline-earthwork requirements.
• Coordinated with Corrosion Specialties to ensure underground water-main cathodic protection was installed and remained intact during JCC's work.
• Maintained responsibility for ensuring areas installed or disturbed under JCC's subcontract were leak-free and compliant with the applicable testing requirements.
• Provided full-time on-site supervision and coordinated required inspections, testing and witnessing with Landmark Structures and WSSC.
• Coordinated activities with other contractors to maintain site access and the overall construction schedule.
• Maintained required as-built records, submittals and O&M documentation for materials and systems installed under JCC's scope.
• Located and protected existing above- and below-ground utilities and structures and provided required trench-safety measures for JCC's pipeline activities.