Northwest Pipeline’s preliminary investigation indicates thatland movement affecting about 500 feet of pipe was the cause of aline break Friday night near Stevenson, WA (see Daily GPI, March 1,2). Following industry practice, Northwest will send segments ofthe pipe for metallurgical testing to verify the rupture’s causeconclusively. A temporary 16-inch surface pipeline is beinginstalled to restore service to LDC Northwest Natural Gas in theNorth Bonneville, WA, area. Northwest Pipeline said it is workingwith geotechnical experts to plan permanent re-routing of theruptured 26-inch line outside the boundaries of the land movementarea.

©Copyright 1999 Intelligence Press Inc. All rights reserved. Thepreceding news report may not be republished or redistributed, inwhole or in part, in any form, without prior written consent ofIntelligence Press, Inc.