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Aiken City updates downtown water flushing program; staff report turbidity cleared in many sequences
Summary
City engineers and HyPhil presented results from a downtown unidirectional flushing program: 73 sequences, 27 miles flushed, about 1,000,000 gallons used, and average flushing velocities exceeding the 3 ft/s target; city to re-run downtown UDF in Feb. 2026 and pursue valve and hydrant assessments for phases 2 and 3 in 2026.
City engineers told the Aiken City Council Dec. 8 that a targeted unidirectional flushing (UDF) program in downtown Aiken yielded measurable water-quality improvements and provided a roadmap for system repairs.
Dave Johnson of HyPhil, joined by Thomas Barrett, Aiken’s city engineer, said the downtown UDF plan divided the area into four flushing zones and produced 73 flushing sequences that collectively flushed about 27 miles of pipe. The downtown effort, conducted July 23–Aug. 7, used roughly 1,000,000 gallons of water; hydrant-flow time totaled about 31 hours. Johnson said the program was designed to…
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