Street maps for the area served by the Owls Head Water Pollution Control Plant, showing combined sewer and stormwater pipes and diameters, produced around 1975 by Metcalf & Eddy and NYC Dept of Environmental Protection. For historic reference only - set since superseded by Baker NYCDEP GIS maps. Maps 3, 4, 5, and 6 relevant to SE corner of Gowanus Canal
