I have to assume that you put the gain in? Adams worked pretty hard not to have grain using large format cameras, this look more like it would be from a 35mm camera shooting fast film.
Excellent photo of the houses and the Lighthouse. Very cool. For me, the grain is just a bit too much and maybe you could have photoshopped out the posts Neat image could have helped with the grain.
My biggest concern in this image is the grain. It is not that I am against grain... I actualyl usually prefer it... but for Ansel Adams.. he usuall used ISO6 or ISO25 film... and grain was very rarely seen. I will vote aside from that though...just a thought.