Check if the steams are there and if they really stop there

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

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

direct both water directions

check waterway direction

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

check waterway direction, it was inverted to be consistent with the confluents but I'm not 100% sure

Check waterway direction