Enviromental Enhancements Voith Siemens Hydro was the first turbine supplier to implement innovative and cost effective ways to reduce the already low environmental impact of hydroelectric power. Our team in York developed and patented designs for Kaplan E’Fishent (copyright) fish-friendly and Francis aeration replacement runners which have been model tested, constructed, installed and proven successful in North America. Aerating Franics runner Fish friendly runner