Flood Entrance Pot

Flood Entrance Pot (sometimes known as Flood Exit Pot)[3] is one of the entrances to the Gaping Gill cave system located about 300 metres (330 yd) south of Gaping Gill Main Shaft. It was the first alternative entrance into the main system to be explored, and it is now a popular entrance into the system, with a fine 38-metre (125 ft) pitch landing in Gaping Gill's South-East Passage. It lies within the designated Ingleborough Site of Special Scientific Interest.[4]

Flood Entrance Pot
Flood Exit Pot
Flood Entrance Pot Entrance
Showing location of Flood Entrance Pot in the Yorkshire Dales
LocationIngleborough, North Yorkshire, UK
OS gridSD 7513 7242
Coordinates54°08′49″N 2°22′56″W[1]
Depth146 metres (479 ft) (To bottom of South East Pot)[1]
Length248 metres (814 ft)[1]
Elevation396 metres (1,299 ft)[1]
Discovery1909[1]
GeologyCarboniferous limestone
Entrances3
DifficultyIV[1]
Hazardsverticality[1]
AccessPermit [2]
Cave survey1980 LUSS survey on Cavemaps

Description

A climb down in the small shakehole soon leads to a tight 15-metre (49 ft) pitch. At the bottom the passage passes beneath the aven where Wade's Entrance joins, and after a further 80 metres (260 ft) it goes round a series of bends to where the last pitch of OBJ Hole enters. There is a chamber after a further 30 metres (98 ft) where a small stream enters from an inlet passage. Downstream a succession of climbs and a 14-metre (46 ft) pitch reach the main pitch of 77 metres (253 ft). South-East Passage in Gaping Gill may be stepped into at the −38 metres (−125 ft) level, but the shaft continues in two stages as South-East Pot to a 29-metre (95 ft) deep pool.[1] This is a window into a large underwater passage, and dye tests have shown that the water from Gaping Gill Main Chamber and from Stream Passage Pot flow through this passage.[5][6] Above the final shaft there is a tight passage, Horrocks-Stearn Crawl, which connects to Bar Pot above its main pitch.[1]

Wade's Entrance (54.147100°N 2.382525°W / 54.147100; -2.382525 (Wades Entrance)) is an alternative entrance 30 metres (98 ft) north-east of Flood Entrance Pot. A 3-metre (10 ft) climb down lands at the top of a 23-metre (75 ft) pitch which drops into the passage a few metres downstream of the Flood Entrance Pot entrance pitch. This is a very much easier than the original entrance, and is the voie normale.

OBJ Pot (54.147352°N 2.383081°W / 54.147352; -2.383081 (OBJ Pot)), is a third entrance 80 metres (87 yd) north-east of Flood Entrance Pot immediately to the east of the path. It consists of a free-climbable 4-metre (13 ft) pitch, followed by a 12-metre (39 ft) and an 18-metre (59 ft) pitch which is choked with shingle.[7] The way on is actually at the base of the second pitch where a tight rift leads into an equally tight inlet that enters the roof of the main passage in Flood Entrance Pot.[8]

History

South-East Pot was discovered and free-climbed down to a depth of 15 metres (49 ft) in 1906 by the Yorkshire Ramblers' Club during a Winch Meet. They commented on the high aven above it, which later proved to be the last Pitch of Flood Entrance Pot.[9] The shaft was bottomed in May of the following year.[10]

Flood Entrance Pot was first entered in 1909 by the Yorkshire Speleological Association who were motivated to look for an entrance after finding some flies and a red worm at the bottom of South-East Pot. They concluded that these must have come from the surface having descended the high aven above. It gained its name as it allowed the Gaping Gill system to be entered even when the Main Shaft was in flood.[11]

Wade's Entrance was opened up by the Bradford Pothole Club in 1957. Eric Wade failing to get through the entrance squeeze in Flood Entrance, dug in an adjacent shakehole and got through after getting a voice connection.[7]

OBJ Pot was opened up by the British Speleological Association in August 1949.[12] It took its name from a beer brewed by Dutton's brewery in Blackburn (the initials stand for Oh be joyful).[7] The connection was finally made with Flood Entrance Pot by Bradford Pothole Club in May 2010, who enlarged the rift at the bottom of the second pitch.[8]

In 1980 Lancaster University Speleological Society published a comprehensive survey and description of the cave.[7]

gollark: https://pastebin.com/G2PMCNhFSkynet: simple websocket-based data transfer (ask if you want the server code).Use with `local skynet = require "skynet"````skynet.receive(channel) - receive a message on the given channelskynet.send(channel, data) - send a message (can be any JSON-serializable type) on the given channelskynet.listen() - convert "websocket_message"s to "skynet_message"sskynet.open(channel) - kind of internal, open "channel" - returns a raw websocket, which you must not use or the world shall burn in nuclear fire.```
gollark: Websocket rednetish.
gollark: Also, I made `skynet` anyway, which is basically not-exactly-backwards-compatible rednet over a websocket server.
gollark: You cannot repeat on all 65535 channels on one computer. In any case, we have full spectrum snoopy whatevers.
gollark: What, running `repeat` on them all?

References
  1. Brook, Dave (1991). Northern Caves 2 The Three Peaks. Clapham, via Lancaster: The Dalesman Publishing Company. pp. 182–1183. ISBN 1855680335.
  2. "Cave Access Information". Council of Northern Caving Clubs. Archived from the original on 6 January 2014. Retrieved 5 January 2014.
  3. Beck, Howard (1984). Gaping Gill 150 Years of Exploration. London: Robert Hale Limited. p. 555. ISBN 0709015526.
  4. "Designated Sites View - Ingleboroough SSI". Natural England. Retrieved 2 April 2017.
  5. Marston, T.K.; Schofield, J. (1960). "Colour Testing at Gaping Gill - Whitsuntide 1960". Bradford Pothole Club Bulletin. 3 (2): 11–12. OCLC 903386498.
  6. Marston (1961). "Water Tracing at Stream Chamber - Gaping Gill - Whitsuntide 1961". Bradford Pothole Club Bulletin. 3 (6): 3. OCLC 903386498.
  7. Boothroyd, Colin (1980). Bar Pot and Flood Entrance Pot. Lancaster: Lancaster University Speleological Society. Retrieved 5 January 2014.
  8. Benn, Ged (November 2013). "OBJ, Gaping Gill's 21st Entrance". Bradford Pothole Club Bulletin. 7 (4): 116–117. OCLC 903386498.
  9. Horn, A. (1907). "Further Explorations In Gaping Ghyll Hole". Yorkshire Ramblers' Club Journal. Leeds: Yorkshire Ramblers' Club. 2 (7): 202–210.
  10. Cuttriss, S.W. (1908). "Gaping Ghyll Again". Yorkshire Ramblers' Club Journal. Leeds: Yorkshire Ramblers' Club. 2 (8): 3062–311.
  11. Greenwood, W.H. (1910). "Flood Entrance: Gaping Ghyll". Yorkshire Ramblers' Club Journal. Leeds: Yorkshire Ramblers' Club. 3 (10): 167–173.
  12. "New Explorations". Cave Science. 2 (10): 87. October 1949. OCLC 6273016.
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