Northeast
Belmont Light, Underground Transmission Line
SGH provided civil and geotechnical consulting services associated with alignment design and construction of the underground transmission line.
Hoosac Wind Project, MA
Hoosac Wind Project
Scope/Solutions
The Hoosac Wind Project is located in the mountains of Western Massachusetts. The project includes nineteen 1.5 MW wind turbines consisting of a steel tower supported by 45 ft dia. reinforced-concrete mat foundations. During construction, the contractor identified issues with understrength concrete and retained SGH to investigate the problems, identify solutions, and assist with dispute resolution.
SGH performed the following work for the project:
- Performed finite-element analyses of as-constructed foundations to confirm adequacy with lower-than-specified concrete strength and avoid costly retrofit
- Performed petrographic examination of concrete cylinders to determine possible causes of understrength concrete
- Reviewed concrete mix-design submittals and quality assurance test results to identify flaws in either process that could have contributed to understrength concrete
- Prepared an expert report and testified at an arbitration, and successfully assisted the contractor in recovering costs due to delays
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Project Summary
2013
Completion Date
Solutions
Repair & Rehabilitation
Services
Structures
Markets
Energy
Client(s)
Bond Brothers
Specialized Capabilities
Geotechnical
Key team members
Additional Projects
Northeast
Overhead Transmission Line
Working for the contractor, SGH investigated the extent of the defects, evaluated the structural adequacy of the drilled shafts, designed temporary excavation support systems and concrete repairs, observed the repair work, and performed a root-cause analysis of the defects.