|March 2012 (35.759 Degrees, 139.789 Degrees) Nishiarai Bridge|
In the Google Earth photo below, we can see the Otake Arch Bridge carrying Route 313 over the Sumida River, where it is joined by Route 461 before continuing across the Arakawa. There are enormous river banks on the Arakawa while the Sumida has almost no banks. That must be why they can divert the water into the Arakawa whenever the Sumida is in danger of flooding. That must also be why the bridges across the Arakawa are much higher than the bridges over the Sumida.
One last photo of the Nishiarai Bridge (below) shows the many spans required to cross this enormous flood control channel. Such a large area where no construction is allowed makes a nice place for a baseball field and other recreational facilities.
Tokyo, Japan's Bridges: Nishiarai Bridge across the Arakawa by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 United States License.