This is a drawing illustrating the various repairs of the Bond Lorraine Sewer, the main trunk sewer that drains the neighborhood of Carroll Gardens in Brooklyn. It is just south of the RH-35 Combined Sewer Overflow (CSO), the worst offending CSO on the Gowanus Canal, pouring a 111 million gallons per year into the Canal. CSO RH-35 only drains 6% of the sewershed, but supposedly accounts for 30% of annual overflows to the Canal. This has led to speculation that there is something wrong again with this section of the Sewer since the last repairs in 1977. The Gowanus Canal currently receives a million gallons per day of diluted raw sewage, concentrated on rainy days. Drawing prepared by GEI Consultants, June 2009 for National Grid.
