PROJECT CASE STUDY he city of Los Angeles’ sewer system, like the sewer systems of many cities across the coun- try, was outdated and in need of repairs by the end of the 1990s. The main sewer sys- tem, which was approximately 70-years-old at the time, was lined with holes and cracks caused by years of typical wear and tear. The poor condition of the main sewer line, known as the North Outfall Sewer , caused it to remain dangerously full i

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