John, I'm most impressed, you've done well, it conveys the very element well of the bridge, the same wouldn't work for the old crossing.
To really appreciate this piece you need to have made the crossing and then like you've said, it's once only that moment, conditions were just right.
I'd traveled to work on the same road every morning for years, the light just that once cast on the wooded valley showed multi shades of greens to the conifers plantation, never seen again, well by me, it could still just happen.
Cheers David