March Newsletter-- Look back at Historic Hoover Dam Bypass Bridge Collapse
HOOVER DAM BRIDGE
At the time of its construction, the Hoover Dam Bypass Bridge was the first concrete-steel composite arch bridge built in the United States and included the longest cast-concrete arch in the Western Hemisphere.
During high winds on September 15, 2006, the Nevada South tower buckled and collapsed. During the collapse, the falling sections severed multiple support cables of the Nevada North tower causing it to fall to the north. The resulting collapse of both Nevada towers imparted dynamic loading to the two Arizona towers, causing both to fall westward toward the Black Canyon of the Colorado River.
Haag Engineering Co. was retained to determine factors causative of the collapse and evaluate duties and responsibilities of the parties involved in the design, erection and use of the specialized equipment.
Haag Research & Testing:Desaturation Testing—Available Now
Haag Research & Testing is the only lab in the US to offer an IAS Accredited desaturation testing protocol. Most desaturation projects are completed within 10 business days after samples are received. We’ve completed hundreds of desaturation tests, and are accepting new projects now!
Contact Haag Research & Testing today, 214-614-6500
Minimum eligibility experience of 100 residential roof field inspections required. Introductory pricing may end without notice. Students will be allowed 30 days to complete the course and proctored exam. Course will take approximately 15 hours to complete.