Thanks for the images they are informative. Could you please describe what tools or methods you used. As in, was this all a content aware technique?
My first opinion is that you should have copied and borrowed, then used the Clone Stamp Tool for the details.
Here I have made a selection of the river.
I then used Cmd/Cntrl + J to make 3 copies.
Turn the top 2 copies off.
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I then used the Move Tool to position the 1rst copied/borrowed selection.
I used Free Transform to make the Copy match the pattern of the river.
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Next I added a layer mask to the 1rst copy.
I used the Brush Tool with a soft round brush to blend the 1rst copy layer into the original.
Now I have to repeat the same technique with the remaining borrowed selection copies to remove the remaining bridge and clean up the treeline.
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