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AUGUST 18, 1997

Local News

Water main ruptured

  by Andrew Walgamott
   BOTHELL--A contractor installing 48-inch pipe casings near Home Depot ruptured a 12-inch water main last Tuesday, causing cloudy water in up to 70 percent of Bothell's water supply, according to Al Nelson, water quality inspector.
   Approximately 220,000 gallons of water were lost the morning of Aug. 12 in 20 minutes before officials isolated the break in the 18000 block of 120th Ave. N.E. No service to the system's 2,000 customers was lost, Nelson said.
   Concerns turned to cloudy water caused by high water velocities stirring sediment throughout the system. Customers were asked to limit their hot water usage to minimize the amount of sediment entering hot water tanks.
   Nelson said the problem was mainly aesthetic though there existed a possibility of back siphonage where pipes experienced negative pressure.
   Bothell fielded less than three dozen complaint calls following the break, according to Nelson. He said the water had cleared up by last Friday. The contractor was working on a King County wastewater treatment pipeline project that will eventually transport sewer from Bothell to Renton via twin 48-inch pipes.
   Nelson can be contacted at 488-0118.