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City of Falls Church Water Distribution System Improvements Tyson’s Corner/City of Falls Church, VA

WDP performed a geotechnical investigation for a new 2.2 M gallon, water storage tank (hydropillar).  Related water system improvements included 3 pump station upgrades and 5,000 LF of new water main. 
WDP provided Special Inspections as required by the Fairfax County Critical Structures program for structural fill/utility backfill placement and compaction; foundations and slabs including reinforcing steel inspections and concrete testing; hydropillar walls including formwork, reinforcing steel and concrete; associated laboratory materials testing of soils and concrete. Considerable structural steel inspections requiring both visual weld inspections and radiographic weld inspections (full penetration welds between tank bowl plates) were coordinated and performed by WDP to satisfy the American Water Works Association (AWWA) quality control criteria that governs design and construction of water storage tanks.