Wisbech prior to drainage schemes, it sat on the river Great Ouse. The port is Cambridgeshire's only gateway to the sea. In 1631 Sir Cornelius Vermuyden built the Horseshoe Sluice at Wisbech at a cost of £8,000. In 1680 the trade of Wisbech had increased sufficiently for the port to be reckoned independent and no longer a member of King's Lynn. In 1720 the corporation was licensed to buoy the channel for the first time. By 1751 it was possible in a dry year to walk across the river bed under Wisbech Bridge. Ship building was carried out in the late
Wisbech Canal George III. Cap. 92) which was granted on 9 May 1794. This Act formed "The Wisbech Canal Company", which had powers to raise £14,000, with an option to raise an additional £6,000 if required. This was to be used to construct the canal which ran from a junction with the River Nene at Wisbech, to a junction with the Well Creek and the Old River Nene at Outwell. The Well Creek connects to the Great Ouse. In addition, the company had powers to maintain and improve the river from Outwell Church to Salter's Lode Sluice on the Old River Nene.