Board of Sanitary Engineers Items (1 total)

Map of the city of Washington showing present main sewerage and sewage outfalls : also the territory flooded in June 1889 (detail)
The same storm system which contributed to the Johnstown Flood in June 1889 also caused flooding in Washington, DC. This map detail shows the extent to which the flooding affected the National Mall. The dark blue lines show the edges of the flooding;…
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