check on field if the stream should be inverted, from the confluents, it's seems that it should be

missing stream (according to Bing imagery)

natural=water overlaping with natural=wetland

waterway might be incomplete

There is a lone node having the tags that the reservoir (or dam) should have. Note sure about how to fix this though

Check for existence and finish waterway, bad import

Check for existence and finish waterway, bad import

direct both water directions

check waterway direction

check waterway direction: it seem that it should be inverted but I'm not sure enough