Gilbert Heathcote's tunnel was an engineering project dating from the 1630s as one of the earliest modern attempts to drain The Fens in Lincolnshire. [1] Rendered obsolete by the mechanical drainage improvements after World War II, it was finally removed in 1991.
It carried water, under gravity, from Bourne South Fen, Thurlby Fen and Northorpe Fen to the Counter Drain and thence to Deeping Fen. A tunnel was required under the River Glen which was (and still is) artificially banked with a level some 3 metres above the surrounding lands and above the Counter Drain. The Counter Drain was pumped further downstream by wind-driven machinery, erected later. [2] At the time of construction Deeping Fen was still inundated.
In 1871 the Bourne South Fen Drainage District was formed to take over the drainage, which had been in the hands of adventurers, and from 1872 a succession of steam engines were used to assist the flow through the tunnel. [3]
The location [4] is around 500m upstream on the Glen of the confluence with the Bourne Eau. Tongue End is the nearest settlement. The modern by-road alongside the original drain to the tunnel is still called Tunnel Bank.
The Gilbert Heathcote for whom it is named appears to be the father of Sir Gilbert Heathcote, 1st Baronet, and an ancestor of the first Baron Aveland. That family later inherited nearby Grimsthorpe Castle, but must have had land and associations with this area to claim the title of Aveland.
The area drained falls within the area of the Welland and Deepings Internal Drainage Board. [5]
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 which 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 washes are no longer used solely as pasture, but may be used for arable farming.
The Fens, also known as the Fenlands, is a coastal plain in eastern England. This naturally marshy region supports a rich ecology and numerous species, and helps absorb storms. Most of the fens were drained centuries ago, resulting in a flat, dry, low-lying agricultural region supported by a system of drainage channels and human-made rivers and automated pumping stations. There have been unintended consequences to this reclamation, as the land level has continued to sink and the dykes have been built higher to protect it from flooding.
The River Glen is a river in Lincolnshire, England with a short stretch passing through Rutland near Essendine.
South Kesteven is a local government district in Lincolnshire, England, forming part of the traditional Kesteven division of the county. It covers Grantham, Stamford, Bourne and Market Deeping. The 2011 census reports 133,788 people at 1.4 per hectare in 57,344 households.
Twenty is a hamlet in the South Kesteven district of Lincolnshire, England. It is situated approximately 3 miles (5 km) east from the market town of Bourne, and 5 miles (8 km) west from Spalding. Agriculture is the major industry.
The A151 road is relatively minor part of the British road system. It lies entirely in the county of Lincolnshire, England. Its western end lies at coordinates 52°48.1892′N0°36.5179′W otherwise, grid reference SK938238.1
The South Forty-Foot Drain, also known as the Black Sluice Navigation, is the main channel for the land-drainage of the Black Sluice Level in the Lincolnshire Fens. It lies in eastern England between Guthram Gowt and the Black Sluice pumping station on The Haven, at Boston. The Drain has its origins in the 1630s, when the first scheme to make the Fen land available for agriculture was carried out by the Earl of Lindsey, and has been steadily improved since then. Water drained from the land entered The Haven by gravity at certain states of the tide until 1946, when the Black Sluice pumping station was commissioned.
Bourne Eau is a short river which rises in the town of Bourne in Lincolnshire, England, and flows in an easterly direction to join the River Glen at Tongue End. It is an embanked river, as its normal level is higher than that of the surrounding Fens. It was navigable in the 18th and 19th century, but now forms an important part of the drainage system that enables the surrounding fen land to be used for agriculture.
Grantham and Stamford is a constituency represented in the House of Commons of the UK Parliament by Gareth Davies, a Conservative.
The Deepings are a series of settlements close to the River Welland near the borders of southern Lincolnshire and north western Cambridgeshire near the city of Peterborough and between the towns of Spalding and Stamford in eastern England.
Thurlby is a village and civil parish in the South Kesteven district of Lincolnshire, England. It is situated just west of the A15 road, 2 miles (3 km) south from the town of Bourne, and on the edge of the Lincolnshire Fens. It is sometimes referred to as Thurlby by Bourne to distinguish it from other villages in Lincolnshire with the same name. Thurlby and the hamlet of Northorpe to its north are conjoined. The parish had a population of 2,136 at the 2001 census, although this had increased to 2,153 at the 2011 census.
Burnt Fen is an area of low-lying land crossed by the A1101 road between Littleport in Cambridgeshire and Mildenhall in Suffolk, England. It is surrounded on three sides by rivers, and consists of prime agricultural land, with sparse settlement. It is dependent on pumped drainage to prevent it from flooding.
In the drainage schemes of the Fens of Eastern England, some of the principal drainage channels are each known as the Forty Foot or Forty Foot Drain, the name being qualified when there is a need to distinguish between them. They are Vermuyden's Drain, South Forty Foot and North Forty Foot.
The Witham Navigable Drains are located in Lincolnshire, England, and are part of a much larger drainage system managed by the Witham Fourth District Internal Drainage Board. The Witham Fourth District comprises the East Fen and West Fen, to the north of Boston, which together cover an area of 97 square miles (250 km2). In total there are over 438 miles (705 km) of drainage ditches, of which under 60 miles (97 km) are navigable. Navigation is normally only possible in the summer months, as the drains are maintained at a lower level in winter, and are subject to sudden changes in level as a result of their primary drainage function, which can leave boats stranded. Access to the drains is from the River Witham at Anton's Gowt Lock.
Tongue End is a small village in the South Holland district of Lincolnshire, England. It is situated 4 miles (6 km) east from Bourne and 6 miles (10 km) south-west from Spalding, and alongside the Counter Drain that runs between Baston and Pode Hole.
Pode Hole is a small village 2 miles (3.2 km) to the west of the centre of Spalding, Lincolnshire, England. The village lies at the confluence of several drainage channels, where two pumping stations discharge water into Vernatt's Drain from land in Deeping Fen to the South and West. Water from Pinchbeck South Fen to the North is also lifted into Vernatt's Drain. The village arose to service the pumping stations.
The Pinchbeck Engine is a drainage engine, a rotative beam engine built in 1833 to drain Pinchbeck Marsh, to the north of Spalding, Lincolnshire, in England. Until it was shut down in 1952, the engine discharged into the Blue Gowt which joins the River Glen at Surfleet Seas End.
Guthram Gowt is a small settlement in the South Holland district of Lincolnshire, England. It is situated 5 miles (8 km) both east from Bourne and west from Spalding, and at a bend in the River Glen.
Deeping Fen is a low-lying area in the South Holland district of Lincolnshire, England, which covers approximately 47 square miles (120 km2). It is bounded by the River Welland and the River Glen, and is extensively drained, but the efficient drainage of the land exercised the minds of several of the great civil engineers of the 17th and 18th centuries.
South Holland IDB is an English internal drainage board set up under the terms of the Land Drainage Act 1930. It has responsibility for the land drainage of 148.43 square miles (384.4 km2) of low-lying land in South Lincolnshire. It is unusual as its catchment area is the same as the area of the drainage district, and so it does not have to deal with water flowing into the area from surrounding higher ground. No major rivers flow through the area, although the district is bounded by the River Welland to the west and the River Nene to the east.