Originally the canal from Llanymynech to Newtown was known as the Montgomeryshire Canal, named after the county of Montgomeryshire it ran through, and it adjoined the Llanymynech Branch of the Ellesmere Canal.
Originally the canal from Llanymynech to Newtown was known as the Montgomeryshire Canal, named after the county of Montgomeryshire it ran through, itself divided into Western and Eastern branches. At Carreghofa Locks near Llanymynech the Montgomeryshire Canal connected to the Llanymynech Branch of the Ellesmere Canal.