River Witham (Boston to the Wash)

The maximum dimensions for a boat to be able to travel on the waterway are 78 feet long and 15 feet and 2 inches wide. The maximum headroom is not known. The maximum draught is not known.
It has a junction with the River Witham (Black Sluice Navigation) at River Witham - Black Sluice Navigation Junction.
The navigational authority for this waterway is Canal & River TrustRelevant publications — Waterway Maps:
- Waterway Routes 01M - England and Wales Map
- Waterway Routes 18M - Fossdyke and Witham Navigation and Tributaries Map (Downloadable)
Relevant publications — Waterway Guides:
Boston Grand Sluice Lock No 3 Boston Lock |
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Fydell Street Bridge | a few yards | 1 lock | |
St Botolph's Church (Boston) The Boston Stump |
2 furlongs | 1 lock | |
St Botolph's Bridge | 2½ furlongs | 1 lock | |
Town Bridge, Boston | 3 furlongs | 1 lock | |
Boston Ring Road Bridge | 4¼ furlongs | 1 lock | |
Railway Swing Bridge (Boston Docks Branch) | 1 mile and ¼ furlongs | 1 lock | |
River Witham - Black Sluice Navigation Junction Junction of the River Witham with the Black Sluice Navigation |
1 mile and 1¼ furlongs | 1 lock | |
Boston Dock Entrance | 1 mile and 5 furlongs | 1 lock | |
Hobhole Drain Outlet Mouth of River. No junction with the Hobhole Drain |
4 miles and 2½ furlongs | 1 lock | |
River Witham - The Wash Junction Junction of the River Witham with The Wash |
6 miles and 2½ furlongs | 1 lock |
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Wikipedia has a page about River Witham
The River Witham is a river almost entirely in the county of Lincolnshire in the east of England. It rises south of Grantham close to South Witham at SK8818, passes through the centre of Grantham (where it may be closely followed using the Riverside Walk through Wyndham Park and Queen Elizabeth Park), passes Lincoln at SK9771 and at Boston, TF3244, flows into The Haven, a tidal arm of The Wash, near RSPB Frampton Marsh. The name "Witham" seems to be extremely old and of unknown origin. Archaeological and documentary evidence shows the importance of the Witham as a navigable river from the Iron Age onwards. From Roman times it was navigable to Lincoln, from where the Fossdyke was constructed to link it to the River Trent. The mouth of the river moved in 1014 following severe flooding, and Boston became important as a port.
From 1142 onwards, sluices were constructed to prevent flooding by the sea, and this culminated in the Great Sluice, which was constructed in 1766. It maintained river levels above Boston, and helped to scour the channel below it. The land through which the lower river runs has been the subject of much land drainage, and many drains are connected to the Witham by flood doors, which block them off if river levels rise rapidly. The river is navigable from Brayford Pool in Lincoln to Boston. Its locks are at Lincoln, Bardney and the Grand/Great Sluice. Passage through the latter is restricted typically to 12-hour intervals during daylight when the tidal levels are suitable. The river provides access for boaters to the Witham Navigable Drains, to the north of Boston, and to the South Forty-Foot Drain to the south, which was reopened as part of the Fens Waterways Link, a project to link the river to the Nene flowing through the city of Peterborough. From Brayford Pool the Fossdyke Navigation links to the Trent.