Construction photos from first addition to Nine Spring Treatment Plant, project start in summer of 1934, this is a picture taken in March 1935, This is early construction of the Blower Building
This is construction of Digester Tanks 1 - 4, in the background you can see the Blower Building and Final Tanks
Activated sludge process was successfully started in May 1936, This is a photograph of Aeration Tank 1 being filled for the first time and is still in service today.
