Aldersley Junction Bridge Birmingham Canal No 21 (Bottom) Lock

Aldersley Junction Bridge and No. 21 (Bottom) Lock are located on the Birmingham Canal in Wolverhampton. Built in 1785 and restored in the 1980s, they were designed by engineers James Brindley, R. Whitworth, and S. Simcock. The structure is made of brick with stone coping. The bridge features a brick elliptical arch with a stone key and straight parapets, and it has a ramp on the north side, measuring approximately 3.5 meters wide. The lock to the east has double lower gates and a single upper gate. This lock is part of a flight of 21 locks on the Birmingham Canal, specifically at the Wolverhampton level. Lock No. 21 was added about 15 years after the main flight was constructed around 1785, as Lock No. 20 was found to be too deep and was subsequently altered in the same year.