Combined Sewer Overflow (Side Weir)
This scattergraph displays data from a flow monitor installed in a 120-in sewer located just upstream from a CSO regulator. Dry weather flows are funneled into a 54-in sewer and continue to the WWTP. However, once the flow depth exceeds 28 inches, additional flow is carried over a side weir to a 108-in sewer and is discharged to the receiving water. This CSO lasted for over five hours and discharged approximately 7,423,000 gallons of untreated wastewater to the receiving water.
Click Here for full-size view.