In the middle
"We're born alone, we live alone, we die alone. Only through our love and friendship can we create the illusion for the moment that we're not alone." (Orson Welles)
I dont know what is in the middle of river but I can still feel its lonliness. He has to stand against the splashes of water, fight against the storms, and see passing ships nearby but cant shout for help. What he can do is just wait, wait and wait untill deteriorates completely one day.