In 2008 we constructed a fish pass at Osbaston for Carillion and the Environment Agency.
The contract was worth £ 150,000.
It involved the construction of a series of weirs and pools allowing fish to effectively bypass the Archimedes Screw being constructed for a hydro electric scheme.
http://talybontenergy.co.uk/?attachment_id=1178
http://www.ritz-atro.de/2006/uk/news_sub12.html