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DYK rotations

Unlike the main DYK pages, which are extracted from facts newly added to the encyclopedia, the DYKs for the portal are a semi-fixed set of factoids, which are presented on the portal page according to the timestamp when the page is retrieved.

Group 1

Cycle determined by the month number. The same DYK is displayed for a whole month

Group 2

Cycle determined by the week number. The same DYK is displayed for a whole week

Group 3

Cycle determined by the timestamp in seconds. A random category, displaying a new section each time

Group 4

Cycle determined by the timestamp in minutes. Another random category

Monthly rotation (group 1)

• the Trent and Mersey Canal was originally dubbed The Grand Trunk Canal by its engineer, James Brindley? (Edit)
• the Store Street Aqueduct on the Ashton Canal in Manchester was built in 1798 at an angle of 45 degrees to the road it crosses, and was the first major aqueduct of its kind and the oldest still in use today? (Edit)
• the Chelmer and Blackwater Navigation in Essex was one of the few working canals not to be nationalised in 1948? (Edit)
• the Droitwich Barge and Junction canals will be connected together by canalising a 600 yd (550m) stretch of the River Salwarpe through the centre of Droitwich, but water will be carried from one to the other by a pipeline built under the towpath? (Edit)
• the new 37-yard (34 m) aqueduct, which carries the Neath and Tennant Canal over the River Neath at Ynysbwllog is believed to be the longest single span aqueduct in the UK? (Edit)
• the site of Shipley reservoir, which fed the Nutbrook Canal, was later occupied by the lake at the centre of The American Adventure Theme Park, until its closure in 2007? (Edit)
• William Goodland, the river superintendent for the River Tone Navigation was evicted from his cottage by the Bridgwater and Taunton Canal Company when they seized control of the river in 1827, but their action was ruled to be illegal by the Court of King's Bench? (Edit)
• the remains of the Shrewsbury Canal include Thomas Telford's 62-yard (57 m) cast iron aqueduct at Longdon-on-Tern, a prototype for the much longer Pontcysyllte Aqueduct on the Llangollen Canal? (Edit)
• bridges on the Bridgwater and Taunton Canal were mined with charge chambers containing the explosive ammonal, during World War II? (Edit)
• the only Caisson Lock ever built, was on the Somerset Coal Canal between 1800 and 1805? (Edit)
• the River Thames is navigable from the Thames estuary to as far inland as the town of Lechlade in Gloucestershire? (Edit)
• the first restored section of the Manchester Bolton & Bury Canal, which joins the River Irwell at Salford was re-opened in September 2008? (Edit)

Weekly rotation (group 2)

• Bugsworth Basin on the Peak Forest Canal is a Scheduled Ancient Monument? (Edit)
• the Grand Western Canal was conceived as one of several competing schemes to build a canal between the Bristol Channel and the English Channel? (Edit)
• whilst less famous than Thomas Telford or James Brindley, William Jessop was engineer on many projects of the Canal Mania era (Edit)
• the new route of the Ashby-de-la-Zouch Canal to Measham was the first canal construction to be authorised under the Transport and Works Act? (Edit)
• both the Barnsley Canal and the Dearne and Dove Canal obtained an Act of Parliament to authorise construction on 3 June 1793? (Edit)
• the locks on the Blyth Navigation were unusual, in that the side walls curved outwards in the centre, to provide an extra 1.5 ft (0.45m) of width? (Edit)
• the Calder and Hebble Navigation built a new branch to Dewsbury after construction of the Thornhill Cut bypassed the town? (Edit)
• the tub boat Chard Canal included four aqueducts, three tunnels and four inclined planes in its 13.5 miles (21.7 km) course from the Bridgwater and Taunton Canal at Creech St. Michael, to Chard? (Edit)
• the 4-mile (6.4 km) Caistor Canal in Lincolnshire was constructed in 1800 but never reached the town of Caistor? (Edit)
• in one of the UK's first major canal restoration projects, the Caldon Canal was restored between 1970 and 1974? (Edit)
• only one third of the length of the Caledonian Canal is man-made, the rest being formed by Loch Dochfour, Loch Ness, Loch Oich, and Loch Lochy? (Edit)
• the artist J.M.W. Turner painted a picture of the Chichester Canal? (Edit)
• the Croydon Canal was the first canal to be formally abandoned by an Act of Parliament when it was closed in 1836? (Edit)
• the estimated cost for a full restoration of the Dearne and Dove Canal and the Barnsley Canal to take narrow boats was £127 million in November 2006, and the likely benefit to the local economy was estimated at £3.1 million per year? (Edit)
• the Douglas Navigation was abandoned in 1801, when it was superseded by the Leeds and Liverpool Canal Rufford branch? (Edit)
• the Leven Canal was commissioned and owned by a woman called Mrs Charlotta Bethell, and had a female lock keeper called Matilda Simpson? (Edit)
• the new aqueduct built to carry the Lichfield Canal over the M6 Toll motorway remains isolated at both ends? (Edit)
• when they heard that Weighton Lock on the Market Weighton Canal was likely to be demolished, the Market Weighton Civic Trust moved quickly to have the whole structure listed as an Ancient monument and their action, together with public pressure resulted in the lock being repaired and reopened? (Edit)
• the new St Germans pumping station on the Middle Level Navigations includes the second largest pumps in Europe, and a glass wall will enable visitors to see the pumps? (Edit)
• water from the Monkland Canal still flows through a culvert beneath the route of the M8 motorway, in order to feed the Forth and Clyde Canal? (Edit)
• British Waterways were praised by Rhodri Glyn Thomas of the Welsh Assembly for their "courageous decision" to manage the 2007 breach of the Monmouthshire & Brecon Canal in the way that they did? (Edit)
• the North Walsham & Dilham Canal was sold for £600 in 1885, but the canal company's solicitor disappeared with the money? (Edit)
• the 9.5-mile (15.3 km) Pocklington Canal was completed in 1818 at a cost of £32,695, a rare case of a canal not overrunning its cost estimate? (Edit)
• the Ribble Link, opened in 2002, is connected to the River Ribble by a rotating sector gate, which is only passable around high tide? (Edit)
• the River Don Navigation was the subject of one of the last major attempts in the UK to attract commercial freight to the waterways when it was upgraded to the 700-tonne Eurobarge standard in 1983? (Edit)
• 19 of the original 31 arches of the medieval Great Bow bridge at Langport on the River Parrett in Somerset were located by ground-penetrating radar in 1987, buried beneath the road which runs from Great Bow bridge to Little Bow bridge? (Edit)
• the idea of a canal between the Chesterfield Canal and the River Don Navigation, similar to the Rother Link, is not new, as similar proposals were made in 1810, 1814 and 1832? (Edit)
• the New Flight of locks from the Bridgewater Canal to the Runcorn and Weston Canal was abandoned in 1966, but the Old Flight was left in place and just covered over? (Edit)
• although the Sankey Canal was opened in 1757, making it the first modern canal built in England, the Duke of Bridgewater claimed that distinction for his Bridgewater Canal, which was not authorised until two years later? (Edit)
• a breach of the Shropshire Canal occurred in 1855, when it broke through into the Oakengates railway tunnel, causing floods in the town? (Edit)
• the Shropshire Union Railways and Canal Company constructed and ran one of the few railways in England which were built by a canal company? (Edit)
• the Slough Arm was one of seven stretches of canal, formally designated as remainder waterways, which were re-classified as cruising waterways by the British Waterways Act of 8 February 1983? (Edit)
• in 1814 the French Benedictine monks who came to Downside Abbey are said to have used the Somerset Coal Canal for the last stage of their journey? (Edit)
• early attempts to build the South Forty-Foot Drain near Boston, Lincolnshire were destroyed and burnt by local landowners? (Edit)
• the designation of the entire Staffordshire and Worcestershire Canal as a Conservation area in 1969 has resulted in historical buildings and structures being retained and improved sympathetically? (Edit)
• Graving Dock lock on the Stover Canal is probably unique in the United Kingdom, in that it was reconstructed with a dock at its side, which could be used as a dry dock when the lock was empty? (Edit)
• the southern section of the Stratford-upon-Avon Canal passes over three cast iron aqueducts, unusual in that the towpaths are at the level of the canal bottom? (Edit)
• those who aspired to build the Stroudwater Navigation and their opponents both commissioned the writing of poems to support their cause? (Edit)
• the last narrowboat to be built on the Swansea Canal was the 'Grace Darling', completed in 1918 at the Godre'r Graig boat yard? (Edit)
• the Tavistock Canal was built with a gentle slope, so that the flow of water along the canal could be used to power waterwheels along the route? (Edit)
• Horatio Hornblower travelled to London along the Thames and Severn Canal (including the Sapperton tunnel) in the historical novel Hornblower and the Atropos written by C. S. Forester? (Edit)
• a large part of the Uttoxeter Canal was filled in and used for the route of the Churnet Valley Railway? (Edit)
• the Wendover Arm Canal leaked so much that it was taking water from the Grand Union Canal, rather than supplying it with water? (Edit)
• work started on the Ivelchester and Langport Navigation in 1795, but the scheme was effectively bankrupt by 1797, and construction of the locks was never completed? (Edit)
• Cleveland House, at the top of Bath Locks on the Kennet and Avon Canal had a trap-door in the tunnel roof to pass paperwork between clerks above and bargees below? (Edit)
• the Anglesey Branch of the Wyrley and Essington Canal was originally built as a feeder to carry water to the canal from Chasewater Reservoir? (Edit)
• the Westport Canal is now used as a drain for the Somerset levels? (Edit)
• Pontcysyllte Aqueduct, which was designed by Thomas Telford and carries the Llangollen Canal over the River Dee near Cefn Mawr, is the highest and longest aqueduct in Britain? (Edit)
• there is an Electricity Pylon which spans the Huddersfield Narrow Canal? (Edit)
• the worlds only Drop lock is situated on the Forth and Clyde Canal? (Edit)
• from 1987 to 2007, 7.5 miles (12.1 km) of the connected section of the Montgomery Canal were restored? (Edit)
• a former aqueduct on the Glasgow, Paisley and Johnstone Canal is now the world's oldest railway bridge still in active use? (Edit)
• British Waterways/Environment Agency Gold Licences all run from 1st January to 31st December? (Edit)

Random rotation (group 3)

• British Waterways is responsible for 2,200 miles (3,500 km) of waterways? (Edit)
• the private Arbury Canals included a Triple Lock, which had a 'Y' shaped chamber, with two separate entrances from above? (Edit)
• the Falkirk Wheel uses the same amount of electricity as boiling eight kettles of water each time it is operated? (Edit)
• over 100 different species of bird have been recorded over the length of the Kennet and Avon Canal? (Edit)
• the Waterway Recovery Group organises a series of Canal Camps for volunteer restorers? (Edit)
• it normally takes a boat 5-6 hours to travel through the 29 Caen Hill Locks which have a rise of 237 feet (72.2 m) in 2 miles (3.2 km), a 1 in 44 gradient? (Edit)
• water from the River Ganges is put into the River Soar, making it an alternative holy site for the benefit of the Hindu, Sikh and Jain population? (Edit)
• Sheila Burnett was disqualified after completing the Devizes to Westminster International Canoe Marathon in 1971 when it was discovered that she was a woman? (Edit)
• the Merthyr Tydfil to Abercynon section of the Glamorganshire Canal was closed in 1898 to protect the village of Aberfan? (Edit)
• at 154 feet (47 m) long, the Wardle Canal is the shortest canal in Britain? (Edit)
• the entire course of the Adelphi Canal has been destroyed by opencast mining? (Edit)
• water from Butterley Reservoir entered the Cromford Canal in the middle of Butterley Tunnel? (Edit)
• James Fussell built a working boat-lift on the Dorset and Somerset Canal at Barrow Hill in 1800, but the canal was never completed, due to lack of finance? (Edit)
• the Grand Surrey Canal was the first to have its own police force, when "Bank rangers" who were forerunners of the British Transport Police were appointed in 1811 to keep law and order along the canal? (Edit)
• much of the Mersey and Irwell Navigation was destroyed by the building of the Manchester Ship Canal? (Edit)
• the New Junction Canal which was completed on 2 January 1905, was the last canal to be built in England for commercial purposes? (Edit)
• Harecastle Tunnel on the Trent and Mersey Canal is said to be haunted by the ghost of Kit Crewbucket? (Edit)
• the Bude Canal mainly used inclined planes to haul tub boats to the upper level, 433 feet (132 m) above sea level? (Edit)
• the 1699 Act of Parliament which allowed the River Tone in Somerset to be improved stipulated that profits were to be used for "the benefit and advantage of the poor of Taunton", but no such action occurred until 1843, when £1,000 was used to build a new wing for the Taunton and Somerset Hospital? (Edit)
• silt was dredged from the River Parrett in order to make Bath bricks, an early cleaning material? (Edit)
• the navigation rights on the River Avon, Warwickshire were confirmed by the Stour and Salwarpe Navigation Act in 1662. (Edit)
• although the lock beside the Grand Sluice at Boston on the River Witham is only 41 feet (12 m) long, it is possible for longer boats to pass through it at certain states of the tide? (Edit)
• a plaque near lock 6 of the Tinsley flight on the Sheffield Canal records the efforts of the workers who reconstructed the lock in difficult circumstances, after it was hit by a bomb in December 1940? (Edit)
• the Anderton Boat Lift lifts boats 50 feet (15 m) from the River Weaver to the Trent and Mersey Canal? (Edit)
• in 2004, the Sleaford Navigation Trust purchased the section of the River Slea between the Navigation Yard in Sleaford and Bone Mill lock? (Edit)
• the boat loading chutes on the Thanet Canal were repositioned as the noise disturbed the occupants of Skipton Castle? (Edit)
• the soliton, a form of wave, was first observed on the Union Canal in 1834, while its discoverer John Scott Russell was travelling along the canal in a horse-drawn boat? (Edit)
• an undershot waterwheel was built into an aqueduct on the Wey and Arun Canal to raise water from the River Arun into the canal? (Edit)
• the Wey and Godalming Navigations were donated to the National Trust by the Stevens family in 1964? (Edit)
• during the Second World War many of the locks and other structures of the Wilts & Berks Canal were used for army exercises and damaged by explosives? (Edit)
• Tom Pudding was the name given to the tub boats on the Aire and Calder Navigation, which were formed into trains of up to 21 or sometimes 38 boats, and pushed by a tug? (Edit)
• Galton's Canal was built for the sole purpose of transporting silt which was to be used to top-dress peat bogs? (Edit)
• in its heyday, the Birmingham Canal Navigations contained about 160 miles (257 km) of canals? (Edit)
• for twenty years goods had to be trans-shipped across a barrier between the Worcester and Birmingham Canal and the Birmingham Canal Navigations? (Edit)
• the Royal Military Canal was built as a defence against Napoleon, and has since been used to control smuggling and as a defence during World War II? (Edit)
• the National Waterways Museum at Ellesmere Port contains the largest collection of canal boats in the world? (Edit)
• the Norfolk Wherry Albion is unique in that she is carvel built? (Edit)
• canal builder John Smeaton also built the Eddystone Lighthouse and coined the term 'civil engineer'? (Edit)
• the 2009 World Canals Conference will be held in Serbia? (Edit)
• the Ribble Link is Britain's newest waterway, being the first opened for almost 100 years? (Edit)
• the Wisbech Canal did not have its own water supply, but was refilled with water at each high tide? (Edit)
• a major user of the Worcester and Birmingham Canal was Cadbury's chocolate factory at Bournville? (Edit)
• the Dundas Aqueduct is a Grade I listed building? (Edit)
• the last operational canal inclined plane in the UK connected the former Wombridge Canal to the Shrewsbury Canal? (Edit)
• the summit level of the Oxford Canal south of Napton junction is one of the most twisting sections of canal in England? (Edit)
• in the early 19th century, the Caen Hill flight of locks was lit by gas lights? (Edit)
• the Staffordshire and Worcestershire Canal was saved from closure in 1959 by a volunteer canal society? (Edit)
• the Birmingham and Liverpool Junction Canal section of the Shropshire Union Canal was the last trunk narrow canal built in the UK (in 1835)? (Edit)
• the group of locks on the Leeds and Liverpool Canal, the Bingley Five Rise Locks are the steepest flight of Staircase locks in the United Kingdom? (Edit)
• the 970-yard (890 m) Berwick Tunnel on the Shrewsbury Canal was the first canal tunnel to include a towpath running through it? (Edit)
• the Thames and Medway Canal once shared Higham and Strood tunnel with a railway line? (Edit)
• technically, Richmond Lock is a half-tide lock and barrage, which also incorporates a public footbrige? (Edit)
• William Jessop recommended John Rennie for the post of engineer to the Lancaster Canal Company, an appointment that helped to establish Rennie’s reputation? (Edit)
• the middle section of the Coventry Canal was officially part of the Birmingham and Fazeley Canal, until both were nationalised in 1948? (Edit)
• the abandoned Coombe Hill Canal is now home to a number of rare beetles, and two species of fly not known elsewhere in the UK? (Edit)
• canal engineer James Brindley built experimental locks in the grounds of his home, Turnhurst Hall? (Edit)
• the Trent and Mersey Canal features one of the two "flyover" junctions on the English/Welsh canal network. (Edit)
• Bristol Harbour is called a Floating Harbour as the water level remains constant and it is not affected by the state of the tide on the River Avon? (Edit)
• Claverton Pumping Station uses power from the flow of the river to pump water from the River Avon into the Kennet and Avon Canal? (Edit)
• Standedge Tunnel is the longest, deepest and highest canal tunnel in Britain? (Edit)

Random rotation (group 4)

• the Glory Hole, spanning the River Witham in Lincoln is the only British bridge which still has secular medieval buildings standing on it? (Edit)
• funding for the initial restoration of the Monmouthshire & Brecon Canal became available as a result of the National Parks legislation? (Edit)
• Crofton Pumping Station on the Kennet and Avon Canal contains one of the oldest operational Watt style beam engines in the world, dating from 1812? (Edit)
• the Anderton Boat Lift was converted from hydraulic to electric power in 1908, and from electric to hydraulic power in 2002? (Edit)
• the Aust Ferry terminal was featured in a promotion for the Martin Scorsese film No Direction Home about the life of Bob Dylan? (Edit)
• a narrowboat carrying coal on the Oxford Canal was drawn by a mule until 1958, and was the last horse-drawn freight narrowboat in Great Britain? (Edit)
• an unusual feature of the Arbury Canals was a Triple Lock, which had a 'Y' shaped chamber, with two separate entrances from above, leading to different branches? (Edit)
• the Selby Canal was built in 1774 by the Aire and Calder Navigation Company, to head off another proposal for a 23-mile (37 km) canal linking Leeds directly to Selby and thus bypassing the Aire altogether? (Edit)
• the Civil Engineer John Smeaton, who worked on the Calder and Hebble Navigation and the Birmingham and Fazeley Canal, also built the Eddystone Lighthouse, a water engine for the Royal Botanic Gardens, Kew and the first 5-sailed smock mill in Britain? (Edit)
• the Worsley Navigable Levels consisted of 46 miles (74 km) of navigable tunnels, and included an underground inclined plane which was 453 feet (138 m) long and raised boats by 106.5 feet (32.5 m)? (Edit)
• the Barton Swing Aqueduct carries the Bridgewater Canal across the Manchester Ship Canal, the swinging action allowing large vessels using the Ship Canal to pass underneath and smaller narrowboats to cross over the top? (Edit)
• water supply problems on the Thames and Severn Canal were caused by springs breaking through the clay lining of the canal bed, leaving holes through which water was lost when the springs receded in summer? (Edit)
• Queen Victoria visited the Manchester Ship Canal to perform the official opening on 21 May 1894, and knighted the mayor of Salford, William Henry Bailey and the lord mayor of Manchester, Anthony Marshall as part of the ceremony? (Edit)
• after 1972, a major source of income for the Chelmer and Blackwater Navigation was the sale of wood from the willows that grew on the banks for making cricket bats? (Edit)
• fourteen of the 17 locks on the Aberdeenshire Canal failed within the first few weeks, and reconstruction of the masonry resulted in the canal being shut for nearly a year while the work was completed? (Edit)
• The Andover Canal was never successful enough to pay a dividend to its shareholders until it closed in 1859, when income from the sale to the Andover & Redbridge Railway produced one? (Edit)
• although the Anson Branch was authorised by the Birmingham Canal Act of 1768, it was not completed until 1830? (Edit)
• about 190 yds (175m) of the Hollinwood Branch Canal have been refurbished as part of a £100 Million redevelopment scheme for Droylsden which includes housing, apartments, restaurants, shops and offices, all centred around a new marina which was opened in September 2008? (Edit)
• the Ashton Canal was one of seven stretches of canal, formally designated as remainder waterways, which were re-classified by the British Waterways Act of 8 February 1983, and upgraded to Cruising Waterway Standard? (Edit)
• the Barnsley Canal Transfer Act of 1871, which authorised the takeover of the canal by the Aire and Calder Navigation, also authorised them to replace ten of the twelve Walton locks by an inclined plane, and although these powers were renewed in 1889, no construction took place? (Edit)
• the Baybridge Canal which ran for 3.5 miles (6 km) through two locks was built entirely within the parish of West Grinstead in the English county of Sussex? (Edit)
• the locks on the Petworth Canal in Sussex were dismantled in 1826 so that the materials could be used to repair the locks on the Rother Navigation? (Edit)
• the Foxton Inclined Plane Trust is campaigning for full restoration of the boat lift, and a £1.78 million grant from the Heritage Lottery Fund has funded preliminary restoration works on the site? (Edit)
• Hall Green stop lock in Cheshire connects the Hall Green Branch of the Trent and Mersey Canal to the Macclesfield Canal, and was originally built as two end-to-end chambers, so that the level of either canal could be higher than the other? (Edit)
• Gas Street Basin, located in the centre of Birmingham, England, where the Worcester and Birmingham Canal meets the BCN Main Line, featured prominently in the 1973 Cliff Richard film Take Me High? (Edit)
• The Smethwick Engine, a steam pumping engine made by Boulton and Watt for the BCN Old Main Line in 1779, is now at the Thinktank science museum in Birmingham and is the oldest working engine in the world? (Edit)
• the Underfall Yard, which is part of Bristol harbour, takes its name from the underfall sluices which were designed by Isambard Kingdom Brunel in the 1830s as a way of scouring mud from the harbour to maintain its depth? (Edit)
• water levels on the River Little Ouse dropped when the sluice at Denver was built on the River Great Ouse, and improvements had to be made to the river to maintain navigation to Thetford? (Edit)
• the first cargo carried on the Bristol Avon Navigation after its construction arrived in Bath in December 1727, and consisted of 'Deal boards, Pig-Lead and Meal'? (Edit)
• improvements to the Prescott Channel in connection with the London 2012 Olympics uncoverered an unexploded World War II bomb, the largest ever found in central London? (Edit)
• there were plans to widen Watford Locks, a group of seven locks on the Grand Union Canal close to Watford Gap service area on the M1 Motorway in 1929, and to replace them by an inclined plane in the early 20th century, but both schemes were abandoned? (Edit)
• one unexpected possibility of cruising on the Witham Navigable Drains is to visit New York, a hamlet just to the north of Hough Bridge on the West Fen Drain? (Edit)
• the River Wissey and the Wissington Light Railway were the only ways to reach Wissington sugar-beet factory, which was opened in 1925? (Edit)
• below Prickwillow, the navigable River Lark flows along a channel in which the River Great Ouse formerly flowed in the opposite direction? (Edit)
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