Create an Account - Increase your productivity, customize your experience, and engage in information you care about.
Show All Answers
CSO-1 was eliminated as part of the Crown Park Sewer and Stormwater Project as of January 31, 2005. Within the past decade, the city has previously eliminated CSO discharge points CSO-2, 3, 4, 5, 9, and 11 as indicated on the map.
CSOs occur because these combined sewer interceptors and pipelines have a limited capacity, and intense rain storms cause flows that exceed pipe capacities. Under such conditions, the flow could damage the city's wastewater treatment plant and/or back up into homes and streets. To prevent system damage and sewer backups, specific structures have been built to allow the combined sewer pipes to discharge and thereby relieve the pressure.
DOE regulations say a CSO location is considered "controlled" if untreated discharges occur there not more than once per year, on average.