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
Economics of English Mining in the Middle Ages and churches. Four metals were mined commercially in England during the period: iron, tin, lead and silver using a variety of refining techniques. Coal was also mined from the 13th century onwards, Iron mining occurred in several locations including the main English centre in the Forest of Dean, as well as in Durham and the Weald. Some iron to meet English demand was also imported from the continent, especially by the late 13th century. By end of the 12th century, the older method of acquiring iron ore through strip mining was being supplemented by more advanced techniques, including tunnels, trenches