Another great shot, and again, the central horizon is a bit unsettling in my view. Here I would probably crop the upper part, show just enough of sky gradation and put more emphasis on water.
The sky is basically dead space I'd crop half of it out . Rule of thirds is what i follow in landscape photography, horizon is either 1/3 up or down depending on the scene.
I like the balance in colour and composition, but may suggest a little tightening of the composition.
With greatest respect to sashbar and fmshoemaker, we sometime get too settled in the tools and habits we use in photography and miss what may be beyond it. By this I mean if you judge composition by the metrics that you understand then you fall into a pattern of seeing the image only in relationship to those metrics. You may tend to look at horizon lines and talk of thirds and may not see the pattern of dark/light/dark horizontal bands that give just enough asymmetric balance around a near central horizon and neatly divide the image into 3rds. Moving the horizon to the 'rule of thirds' (ROT) makes no sense as it totally destroys the rhythm of thirds that you have given the image. All it does is serve the metric that it is the horizon that is placed on the ROT because such is the habit that is formed.
This I would tighten up a little so you have more equal balance of dark above and below. I would also shave a little of the area off the right as I think it balances the image a little better and allows your eye to flow more around the distant waterway instead of landing smack against the opposite shore.