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Siphon Quenches Drought

by Dan Loitz, Plant Engr.; Ketchikan Pulp Co., Ketchikan, AK,
Allen L. de Steiguer, Principal; Camp Dresser and McKee, Seattle, WA,
William R. Broz, Mechanical Engineer; Howard Needles Tammen and Bergendoff, Bellevue, WA,


Serial Information: Civil Engineering—ASCE, 1990, Vol. 60, Issue 8, Pg. 44-46


Document Type: Feature article

Abstract:

An age-old engineering concept�the siphon�enjoys new success in alleviating a severe water shortage at the Ketchikan Pulp Company's Ward Cove Pulp Mill. With major layoffs imminent, the 1800-foot long high density polyethylene pipeline was constructed in just two weeks, despite rugged and primitive work conditions. Delivering 20 million gallons per day, this flexible siphon, combined with a late break in the drought, enabled a return to full mill operation at 37 million gallons per day. Valuable lessons in material selection, construction methods and operating constraints were learned along the way.

Subject Headings: Droughts | Construction methods | Construction materials | Water shortage | Water pipelines | Synthetic materials | Polyethylene

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