You've seen them your entire life, but how much can you say you know about manhole covers?
We uncovered a few little-known facts about these round objects providing access to a world of underground infrastructure.
At SEH, our people define us. You are the reason we lead the industry. Explore open positions, our culture and what “100% employee-owned” means for your career. Connect with your Recruitement Team.
Browse our library of eBooks, case studies, infographics and more. Available for free download, these tools tackle your most pressing project challenges.