I've got a "snipping tool" that lets me save any area of my computer screen. It comes in handy.
I actually saw this exact bing maps bird's eye view. I could have copied it and added it to the site, but I couldn't find how to copy and paste it here.
There appears to be abutments still in the water, so I'm guessing the whole bridge used to be a timber trestle.
Or the old fashioned way... push the Print Screen key and paste into paint, and crop out what you want.
Are there any copyright issues associated with using these Bing images in this manner? I don't really know.