Thirty-one workers in Los Angeles narrowly escaped tragedy on July 9 after an outfall effluent tunnel still under construction partially collapsed, threatening to trap them 370-feet below street level in the dark. The 18-foot diameter tunnel in the L.A. neighbourhood of Wilmington is part of the nearly $700-million Clearwater Project designed to carry treated effluent […] The post Thirty-one workers safely escape collapse in L.A. effluent tunnel appeared first on Environmental Science & Eng...| Environmental Science & Engineering Magazine