There is no such thing,I have been told by men who were in the business of making them as a good or even adequate fishway. There is always an imbalance between the purposes they serve and the results… they are built to try and bring back what man has taken away…The trouble is they cannot be built so as to result in free and easy passage for the fish at all times. A fishway requires engineering and research in its preparation.’

‘Whatever their design, fishways are all built so as to assure that the alewives quickly transit from one pool to another. In most cases they seem to work satisfactorily but unless they are well managed they can effect full use of the stream by the migrant fish.”

John Hay The Run pp105-107