The navigable river Nene extends from the junction with the Northampton Arm of the Grand Union Canal to the mouth of the river on the Wash at Crab's Hole. The navigable river is 88 miles (142 km) long and has 38 locks.
Peterborough (31 miles inland) was the tidal limit until the lock and sluice were built at Dog-in-a-Doublet in 1937, a further five miles towards the sea. The Middle Level Navigations connect to the Nene at Stanground Lock, along a short arm from the river, just outside in Peterborough. There is also a 0.6 mile arm - The West Bridge Arm - in Northampton, which has been kept navigable over the years by IWA's Northampton Branch.
The maximum size of boat that can navigate throughout the river is
length: 78' (23.7 metres)
beam: 13' (3.9 metres)
height: 7' (2.1 metres)
draught: 4' (1.2 metres)
There are no limiting structures, other than the A17 at Sutton Bridge, downstream of Wisbech, and the Port of Wisbech can accommodate craft upto 260' (79.2 metres) x 40' (12.2 metres) X 17' (5.1 metres).
From Northampton (junction with GU Northampton Arm) to Bevis Hall (2.5 miles upstream of Wisbech):
Aqua House, Goldhay Way, Orton Goldhay, PETERBOROUGH, PE2 5ZR
T: 01733 371811
Environment Agency website
From Bevis Hall to the mouth of the river at The Wash
Port of Wisbech (part of Fenland District Council)
The Boathouse, Harbour Square, WISBECH, PE13 3BH
T: 01945 588059
Fenland District Council website