Related Links: Pipeline Bursts Heat Up Safety Questions Over Keystone XL Engineer Blows Whistle on Canada Pipeline Inspections Canada's National Energy Board released its final audit report on Trans- Canada's pipeline management system on April 24. NEB found the company to be in non-compliance with risk-assessment and hazard-identification regulations, monitoring and maintenance protocols, internal audits, inspections and management review.The setback to TransCanada's effort to secure approval to build a major new pipeline segment came less than a week after the U.S. State Dept. delayed, until after the November elections, its decision on construction permitting for the last leg of the
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.