Alfred Dock is a dock at Birkenhead, Wirral Peninsula, England. The dock covers an area of 8 acres (32,000 m²) and provides access to the Great Float from the River Mersey. Of the existing two river entrances, only the north locks remain operational. Tower Road, which links Birkenhead with the Seacombe area of Wallasey, divides Alfred Dock from the Great Float via a bascule bridge.