Newbie effort of a Pier in Venice, Florida

Thanks for the comments.* I was waiting for someone to mention the gaps on the right side--didn't notice them while I was taking the picture!* I'm not very good with photoshop but was wondering if I could remove the gap and make it look right? I actually like the longer view better because I think the greater sense of depth helps the photo.

GeorgeShooter--it was 4 sec, f/20, ISO 100, tripod with self timer. I guess I overdid it on the f stop. At the time, I was trying to get the long exposure wanted good depth of field and didn't know a very small aperture could be a problem. I also wasn't paying enough attention to my focus point. I'll keep your suggestions in mind for next time.