Complex sentence: It was built from 1884 to 1886 to serve the Department of Docks and Harbor Police It was expanded in 1900 and again in 1919 with the clock tower at the end of the pier.
Split into simpler sentences: It was built from 1884 to 1886 to serve the Department of Docks and Harbor Police. The pier was expanded in 1900 and again in 1919 with the clock tower at the end of the pier.