Working on Phase 4, looked up and noticed this. Kudos to you if you can guess where in the map this is just looking at the image.
A clue, built the bridge a while ago as a key link spanning two new regions. I needed the nodes underneath it for a major component in Phase 4.
Coal Valley Lake?
That’s a good guess, that would require a bridge with the high terrain around it! Unfortunately not though, think more southern