Well. Never was there a better time to try picking up the Sigil of Stone than when a stone bridge needs fixing. ...She barely even noticed navigating this, but it does look like someone less deft and quick than her would have just a bit of trouble with it. (And that simply will not do.)
She knows the core of it, the boulder, its impact rings. She's seen its Archon fight, up close and personal. She's seen Earthshakers do ritual workings.
Hopefully that will allow her to improvise something from the standard forms for this purpose.
...Perhaps Influential Domain...?
...No. No, it would be wonderful if she could accomplish that, but - Cairn was not the sort to gently mold and shape. Cairn chose the path of overwhelming power.
So how does overwhelming power solve a broken bridge?
...When Denzil arrives, he finds Ophelia scribbling away with a stylus, and occasionally consulting diagrams of abstruse sigils (- and some in what's probably legible Engineer -) etched in the dirt with a stick.