The canal's Act was passed in 1755, predating that of the Bridgwater Canal, so this can arguably be called the first modern canal. Although known as the Sankey Brook Navigation, this was part of a strategy to make it sound as if was merely an improvement to an existing river, requiring less scrutiny when obtaining the Act, whereas it was actually totally independent of it. Originally joining the Mersey at Fiddlers Ferry, it was later extended by three and a quarter miles to a more reliable deep water connection near Widnes. In ordering the pictures, the canal has been split into four sections:- a) The Main Line 13 miles and 1 furlong to a junction with the Blackbrook and Gerrards Bridge arms. b) The Blackbrook Branch, half a mile long. c) The Gerrards Bridge Branch, one and a half miles long. d) The Boardman's Bridge or Dalglish Arm, one and a quarter miles from its junction with the Gerrards Bridge Branch