The three Whitby Locks linked the Wirral Line to the Mersey at what became Ellesmere Port. For the first few decades there was only a small settlement here, transhipment being done at Chester. When the Birmingham & Liverpool Junction Canal was approved, it was realised that Ellesmere Port would become the main destination for boats from Birmingham and the Black Country. Extensive works were carried out, not being completed until 1843. The final major period of development was prompted by the opening of the Manchester Ship Canal in 1891. From 1922 until 1972, the port was administered by the MSC. The boat museum was established in the 1970s, which has led to many of the buildings being saved.