Great shot. I like the effect of long exposures with water. The suggestion I would make is that it may have been an idea to crop out the wall on the right.
Interesting to see someone using Efke film - I've just bought some 50 & 25 in roll film to try.
Many thanks for the comments and I do agree about the wall. When I took the shot I tried to eliminate it but without it the log and the bit of falling water in front of the log seemed to come from nowhere. If I had moved downsteam I would have lost the flat water above the falls because of the slope I was on. So since the falls are obviously man-made I included the wall , distraction that it is.
Like the photo, I agree with the wall, but I take it it is full frame scan so it is removable. I just started using efke PL-100 and 25 with rodinal. Havn't used rodinal for a long time but starting to like the effect again. film so far seems to have some nice tonal qualities