 In 1859 and 1860 the governments of Prussia and Nassau negotiated over the construction of a railway between Ehrenbreitstein and Oberlahnstein.In Oberlahnstein the line would connect with the Nassau Rhine Railway (now part of the East Rhine line), then under construction, and the Lahn Valley Railway.It was also stipulated in the contract that a railway bridge would be built between Koblenz and Ehrenbreitstein and the Duchy of Nassau committed itself to promote the construction of the Lahn Valley Railway.