|This scene is nice and has more potential than is captured here IMO. I say that because of the lighting. Appears to be midday or maybe it's just overcast, but there's nothing dynamic about the lighting. Seems a little flat.
The 'S' you've captured works well for the challenge, although it's not as strong a component to the photo as I think the challenge intended (to lead the viewer thru the image).
If this was cropped to only half, eliminating the upper half, and taken with some still water and reflections - maybe some early morning light with a little steam rising...??? Just a thought.
As is, I think the image is fairly strong to the theme, and I like that you didn't just find some literal 'S' to photograph. And as a photo it's fine, but in more of a snapshot sense rather than an artistic one.
Best of luck to you in the challenge.