Normally, assessing wall thickness in a pressurized water or sewer line and main requires shutting down the line and cutting into it. But broadband electromagnetic scanning is finding increasing use as a viable, non-destructive testing alternative that does not interrupt utility service.This fall, BEM scanning contributed to a condition study of a 1970s-era force sewer main for the Metropolitan Sanitation District of Greater Cincinnati. Malcolm Pirnie, the water division of ARCADIS, Highlands Ranch, Colo., is the assessment contractor.The consultant hired InfraMetrix LLC, Tampa, Fla., to use BEM to scan select locations in the line where analysis and other tests predicted
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.