Hmm...don't really care for the b&w conversion. I mean this shot is suitable for B&W just not under this ruleset since you can't properly control the effect.
I can not see the river because the photo appears to be under exposed. The composition could be improved by moving either to the right or left of the fence. The fence takes my eye down the center of the photo that leads to what???. Next time and if your camera displays histograms, check your exposure by looking at the histogram.