Originally flowing directly into the River Mersey, it was converted into the sophisticated Birkenhead Dock system from the 1820s onwards by land reclamation, with the main portion of the pool becoming known as the Great Float.
In 1933, with the exception of a small lake, the head of Wallasey Pool at Poulton was converted into Bidston Dock.
[4] A red girdered bascule bridge at Tower Road connects the Seacombe district of Wallasey with Birkenhead.
[6] Furthest upstream is the Penny Bridge, which crosses the head of the pool to connect Poulton with Bidston in Birkenhead.
[10] The site is now known as the Newlands Project Nature Reserve, is 68 hectares (170 acres) in size, with a fishing lake and a 2 kilometres (1.2 mi) of cycling trail.