Sea Planes flying around Pittsburgh in 60's ? Yes they where here .

Pittsburgh has 3 rivers the largest inland port in the US  so to see all kinds of river touring craft would not be unexpected like the Gateway Clipper Fleet and the WWII Duck Boats. Trucks which float and take tourists around the rivers to see the Locks & Dams etc. You can even charter a helicopter
But at one time in early 60's you could get on a Sea Plane and tour the city as well.Sea planes? you think of them more for use on lakes but
located on whats now called the North Shore  a small fleet of Sea Planes operated for several decades near Brunot Island & Manchester. using the Ohio River for take offs and landings and the base was  located on the Allegheny River  near sixth street bridge .
 The service was started in 1940s  by William Graham  who also ran the  Pittsburgh / Butler  Airport at the time .

http://news.google.com/newspapers?nid=1144&dat=19400512&id=jnIbAAAAIBAJ&sjid=UkwEAAAAIBAJ&pg=6050,1185619

http://news.google.com/newspapers?nid=950&dat=19470606&id=NfdPAAAAIBAJ&sjid=IVUDAAAAIBAJ&pg=5020,6735858

http://news.google.com/newspapers?nid=1144&dat=19390820&id=CfUaAAAAIBAJ&sjid=SkwEAAAAIBAJ&pg=3471,1228614

I can not find a reason why the service was stopped had it gone bankrupt or was river land needed for development  or if owner had passed away and business not continued. But as a kid I remember standing on Mt Washington and seeing the planes take off and land on the Ohio in the early 60's .
There was also a sea plane base which operated near the Mckeesport -Dravosburg area as well up till late 60's  as well.