Here's another clue: This bridge crosses a river with a name due opposite of its location relative to mine.
And another anecdotal clue: It is visible from Street View. When I first verified this, the image(s) I found showed the sign with the bridge name visible in plain sight. I got really nervous that I had done the same thing, and quickly rushed back here to double-check - only to realize, of course, that I had enough sense to post a picture of the opposite opening. Whew!