Collington Elevated Water Storage Facility – Waterline Testing & Valve Installation

Johnston Construction Company

• Served as Civil Subcontractor to Landmark Structures I, L.P. for waterline testing and valve installation associated with the Collington Elevated Water Storage Facility.
• Installed the project air release valve assembly, including Polyken wrap, solid sleeve, manhole, associated accessories, backfill, compaction and compaction testing.
• 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.