The River Welland is a lowland river in the east of England, some 65 miles (105 km) long. It drains part of the Midlands eastwards to The Wash. The river rises in the Hothorpe Hills, at Sibbertoft in Northamptonshire, then flows generally northeast to Market Harborough, Stamford and Spalding, to reach The Wash near Fosdyke. It is a major waterway across the part of the Fens called South Holland, and is one of the Fenland rivers that were laid out with washlands. There are two channels between widely spaced embankments with the intention that flood waters would have space in which to spread while the tide in the estuary prevented free egress. However, after the floods of 1947, new works such as the Coronation Channel were constructed to control flooding in Spalding, and the washlands are no longer used solely as pasture, but may be used for arable farming.
Significant improvements were made to the river in the 1660s, when a new cut with 10 locks was constructed between Stamford and Market Deeping, and two locks were built on the river section below Market Deeping. The canal section was known as the Stamford Canal, and was the longest canal with locks in Britain when it was built. The river provided the final outlet to the sea for land drainage schemes implemented in the seventeenth century, although they were not completely successful until a steam-powered pumping station was built at Pode Hole in 1827. Navigation on the upper river, including the Stamford Canal, had ceased by 1863, but Spalding remained an active port until the end of the Second World War.
