The main structure at the supply depot, the docks are designed to accommodate small to medium sized boats which would deliver food, general supplies, and luxury items such as books and newspapers for the staff. Originally a wooden construction, the docks were quickly reinforced with some concrete and steel to ensure they would last for the duration of the asylum's life on the island. The concrete gangways and metal railings that now make up the docks have proven to be sturdy constructions, even if they are not the most glamorous.