The cross-border Keystone XL pipeline was hit with another setback on Aug. 15 when a U.S. District Court judge in Montana ordered the U.S. State Dept. to perform a supplemental environmental impact statement on a new route through Nebraska.
U.S. Army Corp. of Engineers' researchers, leading a team that recently completed the 3D printing of 9.5-ft-tall reinforced concrete walls for a 32-ft x 16-ft deployable barracks, are setting their sights on a future project--3D printing of concrete roof beams--even before they have put the precast concrete lid on the printed walls.
St. Louis-based Castle Contracting, a wholly owned subsidiary of McCarthy Building Cos., promoted Mike Pranger to vice president of operations, the company’s top position.