This is the only pre-searing bridge near the aqueduct. Okay, fine.

Here's the same bridge, same location (see minimap)... but, uh...

That's not quite the same bridge...
But wait, there's more!
Here's a post-searing bridge, this time north-east of the aqueduct.

Now here's the same bridge, pre-searing.

Wait, that's no bridge...
So, not only have they built a bridge since the searing, but it has somehow been damaged, despite not being hit by the searing!
Now, admittedly, Regent Valley has been severely bashed by the searing, with the terrain far more deformed than, say, Ashford or Ascalon City. Even so, I have never seen giant flaming crystals form a bridge across a river...