Hultman Aqueduct

SGH conducted a condition inspection of the 1.8 mi long, dewatered section of the aqueduct. Highlights of our work include the following:

• Performed an internal inspection and sounding of the 150 in. dia. concrete cylinder pipe
• Identified areas of highest concern based on previous structural analyses of the pipe
• Tested the areas where the pipe was highly stressed using nondestructive impact-echo and impulse response to detect cracking in the outer core
• Conducted surgical destructive testing that included removal of the inner core and steel cylinder to document the condition of the joints, the outer core, and corrosion on the steel cylinder
• Performed laboratory testing, including petrography and chloride content analyses, to characterize pipe condition