I'm not an expert spey caster but: it may be possible to make full casts
but probably not for many people since there is a pier running the full
width of the bridge under the center. Also, people tend to park under
the bridge so unless you get there early enough or can talk people
into moving their cars, you may have problems in that regard. You can
certainly set up a camera under the bridge tho you'd probably be best
off doing so right on the edge of the water.
As I said before, this tends to be a busy spot at this time of year. It's
one of the easiest productive spots to get to on the creek.