Complex sentence: Although repaired and used for a further 16 years, the pier was eventually replaced in 1876 at that time the bathhouse complex was extended with the construction of the Bath's Hotel the forerunner of the Grand Hotel.
Split into simpler sentences: Although repaired and used for a further 16 years, the pier was eventually replaced in 1876. At that time the bathhouse complex was extended with the construction of the Bath's Hotel, the forerunner of the Grand Hotel.