History of Northwich were looking for coal, but instead discovered rock salt, in the grounds of the family home, Marbury Hall, to the north of Northwich. Soon salt mining started again. This mining area is now known as Dairy House Meadow. By 1732 the River Weaver was improved from Frodsham Bridge to Winsford Bridge and eventually allowed vessels up to to travel up to Northwich Bridge. This allowed salt to be transported by boat rather than cart. The Trent and Mersey Canal, opened in 1775, passed to the north of Northwich because of objections from the trustees of the Weaver Navigation. However, the
Nantwich Bridge military use being exempt. The bridge appears to have survived the fire of 1583, which started nearby and destroyed much of the town to the east of the river. In 1622, William Webb writes: In 1652, Wich Bridge was described as lying on "y greatest & most frequented Road within this County", and it was designated a county bridge on 27 April 1652. This meant that the county was responsible for its maintenance, but also that Nantwich had to pay towards the maintenance of the other county bridges, a charge from which the town had previously been exempt. By 1663,