We crossed the Thirlmere Aqueduct again near Staveley on the Potter Fell walk. It is disguised as a bridge by the Victorian ironworks were a give away. The pipes are high above the beck below. I dropped a stone and timed 1.90s. I'm not sure the stone fell cleanly, so let's say 1.5s. Using s=1/2gt^2 gives a height of 11m. It's probably a little under 10m but not much.
