Max
Dobey
in the
Wildlife
Series
Max
Dobey
in the
Wildlife
Series
pitch
into the
Wildlife
Series
Ali
Neill
on the
pitch
into the
Wildlife
Series
107 Cueva de la Hoyuca (Cueva de Riaño 2) (Cueva
Uzueka)
Riaño (VP51950002 old) new @ Easter 2007 30T 451918 4800014
Alt. 175m
Part of the Sistema de Cuatro Valles
(Traverse length 52439m after summer 2009; vertical range 138m) Depth 100m
(to upstream Llueva level)
The five entrances to Cueva de la Hoyuca are:
The other entrances into the Four Valleys System are Cueva de Riaño (105), Cueva de Carcavuezo (081), Cueva Llueva (114) and the collapse cave behind the resurgence at Los Boyones (117) in Secadura.
Updated 13 February 1998; 19th February, 18th April 1999, 12th December 1999; 14th March 2000; 16th September 2000; 23rd February, 7th October, 26th October 2001; 15th April, 25th October 2002; 8th November 2003; 1st October 2006; after Easter, 26th September , 27th October 2007; 15th April, 14th June, 24th, 29th September 2008; 24th February, 4th May, 24th August, 2nd November 2009
An incomplete description follows. Some sections are possibly described twice,
and the whole account (especially the entrance series) needs rationalizing as part of the re-survey.
A cave of great variety, potential and in places, complexity. Cueva de la Hoyuca is the major segment of the Four Valleys System (line survey). The cave continues to yield extensions, not just at the end, but in the entrance series which most people have neglected in their hunt for glory.
All of the water met in the cave eventually joins with some of the water from Cueva de Riaño (105), the water from Cueva de Carcavuezo (081) and then enters Cueva Llueva (114) and flows to resurge at Los Boyones (117) in Secadura.
If the route through the cave is known then a quick trip from the original entrance to the end of Trident Passages and back will take about 9 hours. The Giant Panda entrance (opened up in 2008) may cut a couple of hours off this time. The route from the original entrance sumps in wet weather in at least two places. The Giant Panda entrance may provide more "all weather" access, for example it was used at Easter 2008 when new explorations were taking place in the Gour Inlet extensions.
Route through into Cueva Llueva
Five entrances are known. The Church Entrance, only discovered in 1986, lies in a wooded depression next to the track, 200m below the church. A 6m high entrance drops down into a small passage. A short stretch of hands-and-knees in deep mud spoils the passage before it emerges into Quadraphenia at the first dog-leg. The unfortunate fact about this entrance is that a local farmer has used a nearby slot as a means of getting rid of manure. The deep mud may not be what it seems and perhaps should be checked out from inside the cave before attempting a trip through. Reference CE documents the gran depósito de estiércol and the possible consequences. During the 1994 recovery, a old door was used over the mud and this is likely to be still in place.
The "old" entrance (photo) is a couple
of metres up a wooded slope at the bottom of a maize field. A short, constricted,
draughting entrance crawl, with drops below, enters a small chamber. Straight
ahead, a descending passage drops to a calcite-floored chamber and a further
short slide down enters a maze of rifts where carbide arrows point back towards
the entrance. A short climb up and a tight sideways squeeze
(photo) pops out into Quadraphenia.
(Back from the entrance chamber, a ladder up bypasses the tight squeeze and
drops down into Quadraphenia). An alternative route through to Quadraphenia
is from the second entrance chamber, where a climb up straight ahead leads
to a crawl and climb down into the start of Quadraphenia, bypassing (and
passing) the tight squeeze.
(A Roof Passage in the entrance series was surveyed August 2002 -
length 108m, and needs a write-up).
The passage enlarges from a slight stoop almost immediately and the next 560m is a trot along sandy-floored tunnels (photos 1 2). Large junctions (one of which brings in the Church Entrance passage) are negotiated by four left hand turns until a final right hand turn leads down to a low section into the stream in Pigs Trotters Chamber with its fine roof pendants. A short crawl over black cobbles meets a smaller inlet passage on the right. The inlet ends at a wet flat-out crawl on silt which sumps in wet weather and which often has to be dug out after the winter. The crawl is abandoned by slithering up into a small chamber on the left. A series of phreatic chambers is entered which are connected by short crawls. Some hundred metres of joint- aligned walking follow and this ends at a small boulder choke where the only way on is down into the low and wet Punk in the Gutter which lasts for only a few metres.
First River Inlet is passed on the left and the way enlarges. The stream is left to clamber over large, blocks and the only way to regain the water is down through a narrow slot.
The next 1000m of passage - the Gorilla Walk - is generally stooping-sized with a metre or more of water to wade through. At the end a major junction is met. Second River Inlet - the route into Cueva de Riaño (105) - comes in from the left while the way on is to the right. The route for the next 500m is obvious, through the Near Stomps, a large stream passage where the route is mainly over large sand banks. Gour Inlet is passed on the left and 100m further on, Obvious Junction is met up on the right. The river is left behind as twin passages unite at the start of Crossover Crawl. This is a generally low, sandy passage which ends after 160m at a walk down into the Third River.
Downstream, the next 540m are easy walking through Las Playas, the last 200m or so being on sand. The main passage is then blocked but a small passage with deep water (B Road) sets off on the right and the large, main route is soon rejoined on the other side of the collapse. One hundred and forty metres further on 4th River Inlet is passed and after another 100m of walking the entry to the Astradome is seen on the left.
By continuing downstream, 44 Chamber is reached and then the streamway becomes small phreatic passage for 340m to Sandy Junction, where the stream left at Obvious Junction enters on the left. The way on is downstream to face a boulder choke and the entry to Armageddon.
Armageddon is a 260m long heap of boulders, the first 20m of which are negotiated by following road works bunting (still there?) through the pile over drops into the stream below. Then by striking out and up (generally to the east) the boulders are left temporarily for a sandy walk, passing a large passage on the right - the entry to the Armageddon Bypass. A clamber down to stream level is then required and finally a climb to the east leads to a ladder pitch of 5m down through precariously perched boulders to the stream. The ladder has been in place since the middle of the seventies.(One or more trips have negotiated Armageddon without finding the ladder).
Armageddon is left behind and the water followed down into Paisley Passage, a 20m wide and 4m high bedding plane. The passage terminates after 200m at Green Choke with the water seeping away on the right.
The way through is over fallen slabs and scree to the left and all routes unite as a slither up to the head of a roomy bedding plane - the Giants Causeway. A walk down over large slabs leads to a pool and the stream is regained. The water is followed for 160m over sandstone blocks in a bedding 3 to 4m high. The water drops over a small cascade and the next 150m are negotiated in deepening water as Duckhams Sump is approached. The route is along the right hand wall and then out into deep water for 5m towards the sound of falling water. With little enough airspace at the best of times, muddy swirls on the roof show that the whole area sumps. The exit is up through a body-sized hole in the flat roof into an awkward rift which is followed upstream for 100m. It is then possible to climb up on the left into an area floored with large level-topped blocks and sand. The bedding becomes increasingly larger until a descent is made to a high inlet on the right. This marks the start of Rocky Horror.
Route finding on this 200m long pile of immense blocks can take a couple of hours though some routes have been marked. It is generally best to keep fairly high up on the right of the passage, leaving the stream down on the left. Passage walls eventually appear out of the gloom and the floor gradually reaches the roof. The stream can be found by dropping down on the right a few metres back from the end. A comparatively small and well decorated passage meets the stream after 80m.
A draught whistles out between boulders both at stream level and at a higher level and one route through the unstable mess was pushed in 1986. The loose connecting choke joins with the 1985 Extensions in Cueva Llueva (114) on the upstream side of the upstream sump. The route appeared to collapse behind the explorers on the second trip through.
Other passages are now described by working through the cave from the main entrance
By dropping straight down in the entrance.................. Other bits off the entrance series, Lank?
At Easter 1994, a route from the 1st chamber in the old entrance to Quadraphenia was tackled up. This appears to involve a 5m climb up and a ladder down and cuts out all the complexities of the old route. The route was detackled after the summer of 1994 and is not recommended for rescue purposes.
A small passage off Quadraphenia, just after the first dog- leg, leads to daylight above, although this pitch has not been descended. It has been seen on the surface as site 2872.
After the junction leading to the Church Entrance, at the next double bend, a walking-size passage on the right soon drops to a low, continuing streamway, pushed a short distance downstream in 2008.
The next junction in Quadraphenia, about 80m further on, is where a normally dry stream bed crosses the passage. To the west, Tiler's Way is about 400m of smallish phreatic passage that can be followed to a number of branches, all of which choke. To the east from Quadraphenia the stream sumps after 20m.
At the same junction, a 6m pitch up (re-bolted in 2008) leads to Roofer's Way, about 200m long to where it becomes too tight.
In the next 20m of Quadraphenia, up to a left hand bend, two passages on the right soon become too low. A narrow rift on the left leads to an apparent sump pool, with a possible continuation with low air space as there is a draught.
Forty metres after the last acute bend in Quadraphenia, a 4m pitch up* leads to a complex area of rifts also reachable by pitches down beyond Flashbulb Hall. A long passage shown on the early drawn survey has not been relocated but may be a low crawl following a stream passage upstream out of the area. Pull-up Passage is the first route on the left on entering the maze and appears to warrant further investigation. It is reached by a short ladder pitch, but this can be bypassed. A climb up over a sump requires combined tactics to reach the continuation of this passage. Opposite the 4m pitch up, a stream issues from a
sump and flows along Quadraphenia for 50m. (Was it this stream that was dye tested at Easter 2009? Dye dropped into the sink below Fuente de la Cuvia was seen here 30 hours later.)
*The ladder is in place but is in poor condition. It was probably installed in 1991 so was re-rigged and an SRT rope rigged for protection in summer 2009.
After another 80m, a passage on the right of Quadraphenia is an oxbow. Part way along, climbs down rifts drop into a low, wide stream passage, also reached down a slope at the next junction in Quadraphenia. The second side passage in the oxbow was dug through in 2008 into previously entered passage, assumed to be part of the Flashbulb Hall series.
Next in Quadraphenia is a climb down at Marathon Junction. Here, to the left, is Marathon Passage - a mainly walking-size passage taking a small stream and draughting in, presumably towards the surface. At the end, climbs and small chambers are largely calcited up.
Climbing up straight ahead at Marathon Junction, an easy going, sandy passage leads to a climb down to Pigs' Trotters Chamber, but the normal route is right to Gloomy Chamber and Pigs' Trotters Chamber.
On the right hand wall of Pigs Trotters Chamber is 100m of minaret-type passage which leads up to Flashbulb Hall. On the left 20m before the hall is a small rift that enters a well decorated section with a pitch down into an unsurveyed and incompletely explored section - God Knows Passage? In this area a route connects to Flash Bulb Hall by a traverse ending up behind the big block in FBH. This passage is said to contain a dog skeleton (??).
Various routes up rifts in Pigs Trotters Chamber to the left of the route to Flashbulb Hall lead to a high level passage, Wardrobe Passage. At ther start of Wardrobe Passage, a junction on the left immediately reaches a further junction. On the right, a low passage ends at a twisting aven carrying a good draught. To the left at the junction, a rift passes back over Pigs Trotters Chamber while, straight on, a passage ends at a choke. Two routes over traverses lead to a low crawl continuing low and wide. A pitch down from the traverse connects to the main route downstream from PTC. These areas were investigated at Easter 1994 and again in 2009 when the survey was extended. At Easter 1997, the pitch at the end of Wardrobe Passage was dropped into a fine rift in which was found a survey station note from 10 years previously, linking with God Knows Passage. (Survey notes have disappeared?)
Flashbulb Hall is a shattered, damp area of massive block collapse. On the righthand wall of FBH a small inlet passage remians unexplored. The main way on is a roomy passage leaving FBH opposite the point of entry. Several holes in the floor are passed and there is a possible roof passage at the point of entry. The main way reaches a large block where a 16m pitch enters the maze area around Pull-up Passage. To the right, traversing across deep holes (traverse line advisable) leads to an aven and shaft where pitches of 6m and 16m pitches, descended in 2009, connect to the maze around Pull-up Passage. Crawling on a ledge around the shaft leads to ongoing large passage and a low level streamway. The large passage chokes. An inlet on the right before the choke has been surveyed to a stal squeeze, continuing beyond. Back at the traverse at the large block, a route to the left enters a chamber where a climb up a fissure on the right enters Dog Series - large, well-decorated passages. Bones seen in 2009 seem to be close to a former entrance.
By continuing upstream at the first wet crawl, walking sized passage is reached. The stream is left where it emerges from a low section and a higher level phreatic tube entered. Awkward progress is stopped by the 9m Sima Baz. A short length of passage enters an immature stream that sumps 50m downstream and becomes too tight 100m upstream.
Extensions in Gorilla Walk?
At Easter 2002, two extensions were pushed around the Gorilla Walk. The first
is found on the right of the passage before dropping into the water. A draughting
dig through boulders to a 4m climb up. The passage trends upwards passing
over the Gorilla Walk and ending up about 30m above water level and 70m west
of the starting point.
The second extension is Windy Inlet a strongly draughting inlet in
the roof about 3/4 the way along the Gorilla Walk. The passage is
generally small to a 6m climb. Beyond is a rift excavated of boulders that
leads to an aven that has been climbed to where the passage appears to finish
close to site 253 and site 2691.
This Windy Inlet series is described as requiring SRT kit for 5m and
30m climbs.
Over Easter 2007, the top of the 30m aven was molephoned and positioned under
a large depression close to site 253 and 130m east of Cueva
de las Castañas. The molephone position in the depression (about
7m above the underground station) is documented as site
2691. At Easter 2008, the Giant Panda entrance (site
2691) was dug out and cavers emerged from Hoyuca after climbing up from
the Gorilla Walk. The new, top entrance has been partially stabilized
using acros and planks and the route in and out proved a couple of times.
A new survey has been carried out from top to bottom. (See
site 2691 for Giant Panda description).
Green Van Series, etc?
A dye test from Cueva de las Castañas (102) has been carried out and fluoroscein emerged between floor pebbles in Gorilla Walk opposite the entry of the last downstream inlet (on the left), but no dye was seen in the inlet water!
The Zoological Gardens leads off from the phreatic passages at the end of the Gorilla Walk as a wide, muddy crawl. The passage continues as a rocky rift with some very impressive fossil corals in the floor. There is one calcite formation or fossil which looks like the vertebrae of an animal about 30cm long. The passage ends at a calcite blockage and was surveyed for 265m in 1997.
Second River Inlet is 200m of mixed caving ending at a low crawl with a powerful draught. The link through into Cueva de Riaño (105) was made with the minimum of digging in 1986, and the first through trip - Hoyuca maize field entrance to Riaño entrance - at Easter 2008. This inlet is awkward in places, having three tight sections near the Riaño end. The first is a squeeze between a solid limestone roof slab and flakes on the floor, followed by two flat out tight squeezes in the stream which may have to be re-excavated of gravel to pass.
The next feeder is Gour Inlet, easily recognized by the cream colored
flowstone on the stream bed where it emerges into the main river passage.
The initial crawl is in an oxbow to the main passage and the inlet joins
part way round. This starts flat out in water but quickly gains height. The
passage has been described as "a really lovely inlet with nice walking
and formations". This ends after 150m at a bouldery, 35m+ high (disto
measurement) chamber and a climb which was bolted up an overhanging crack
on the right wall in 1993. The top and the observed large passage (with stal
bosses and lots of mud) was not reached due to shattered rock on the chosen
route. In the summer of 2006 a quick trip before an aeroplane flight gained
a new perspective. A new bolting route was started on the opposite wall in
a corner that looked easier than the previous route. At +5m a traverse is
stopped because of sandstone. By going back to the right a little a climb
over calcite regains limestone at about +12m and easy bolting. From this
new vantage point the passage does not exist but there may be a continuation
above the inlet back towards the main passage. The chamber also continues
up for at least another 30m
The inlet water comes from boulders at floor level and it may be worthwhile
to dig at this choke.
At Easter 2008, Gour Inlet was pushed for 369m heading east. A climb up has
now been laddered and a traverse along a ledge enters a passage several metres
up the back wall which had been previously entered. The way on is via a slot
hidden in the wall behind a flake. This had clearly not been entered before,
as the mud floor was untouched, shiny, sticky mud. This passage can be followed
through muddy, crawling passages to an 8m pitch down into a streamway.
The pitch is a straight hang of around 8m into a widening rift. Landing in
a thigh deep pool, the stream enters down a 2m cascade which is covered in
the same cream coloured flowstone which is found all along Gour Inlet.
Downstream, the passage sumps round the first corner, but upstream leads
into a big hading rift where a long climb up a precipitous slope comes to
a point below a large boulder choke. Climbs up into the boulders look possible
but precarious, and a lot of rubble has obviously come down into the chamber
from this choke in the past. Continuing upstream at the base of this chamber,
the stream soon sumps again, but an obvious dry oxbow provides a bypass and
the stream is regained. Further crawling on cream coloured flowstone in the
stream leads to another sump, with another dry oxbow. But this time the oxbow
lead into a boulder choke.
An excavated route through this boulder choke soon leads into a large chamber
with a damp sandy floor which can be climbed up to a summit in the middle
of the room. The chamber is named the Soggy Sahara. From the middle
of the chamber the stream can be heard louder than ever, and is found entering
the chamber down a 3m cascade at the far side and sinking into the floor.
Upstream from here requires some careful traversing over a deep pool with
a low ceiling before the passage opens up into a tall walking rift passage.
Passing some fine lone straws hanging right in the middle of the passage,
a long straight section leads to a right angle bend and more taller walking
rift. A loud rumble can be heard in the distance and the source is eventually
reached, a 6m diameter circular chamber with water raining down from above
into a deep pool. The rift just before this point is over 10m high, and the
aven itself was impossible to measure on the original exploration due to
the spray from above. The water was coming down all over the place, so either
it was broken by a ledge as it fell, or it was coming from more than one
passage above. It may be that a substantial amount of it emerges as a spout
about 15m up, but it was too wet to be sure of anything. At the end of the
original exploration and survey trip, the final sketch was finished with
water pouring across the page. The team retreated from the spray, wind and
noise to start heading out, thinking that the most appropriate name for this
pitch at the "end" was Sensory Deprivation. The logbook account of
the trips to push Gour Inlet at Easter 2008 can be found
here.
[Interim description] During the summer 2008 explorations a dry, 25m high
aven greeted the explorers and the chamber was renamed The Thunderdome.
The first rash of bolts meet a slope to a large passage heading west. This
was pushed to the top of the original aven in "old" Gour Inlet and, with
various loops and side routes, the total length of this segment comes to
816m. Also along this passage are fine fossils including corals and a set
of vertically stacked fault chambers, where huge blocks have dropped off
sandstone beds to create a 30m high series of voids. The water inlet is reached
by a bolt route and a streamway entered. Over 550m is surveyed on a NE trend
in walking passage about 2m wide and up to 20+m high. The passage continues
for an estimated 350m past grottos and up a set of half metre cascades where
it changes to a hands-and-knees crawl. The water emerges from a choke of
large, rounded cobbles. The whole of this streamway is on a very shallow
gradient with a cream flowstone floor. There is knee deep wading in the upstream
section. The series was "completed" and surveyed at Easter 2009.
By continuing downstream at Obvious Junction, Far Stomps is entered. This large passage runs for 550m over giant blocks to a sump - the water passing through to Sandy Junction. Near the start of this passage, a small inlet runs for 40m on the south side until it becomes too small where a false floor divides the passage.
Third River enters at the end of Crossover Crawl and is 800m of fairly unpleasant passage. After 200m upstream, a deep pool has to be negotiated followed by 300m of crawling and rift passage to where the water emerges from a sump. This point is about 50m from the downstream sump in Torcón de Riaño (106) although a human connection is unlikely. The rest of this uninspiring section of cave lies up on the right and ends at a couple of avens apparently over the top of the crawl traversed before.
Straw Inlet starts as walking passage but degenerates into a low crawl over mud. A passage near here was pushed during 1995 and ed the following year. The route draughts in well but goes up into a very slippery calcited boulder choke. Forging a way on would involve bolting and a major push.
Fourth River Inlet ends at a draughting boulder choke after about 200m. This has yet to be surveyed and pushed.
Eighty metres downstream from this point the entrance to the Astradome is seen on the left hand wall. A short walk up and along a muddy floored passage breaks out into a magnificent circular aven. Single voices sound like cathedral choirs as they rebound off the walls of this 30m diameter and 102.5m high feature.
In the summer of 1993 the Astradome was bolted up in about 10 hours over 2 days. The climb was stopped about 4m from the top by a bed of sandstone which would not take the studs. A hole in the roof was visible. In 1994, the climb was completed using a scaling pole. A chamber above was entered with passage above. It was from near the top of the Astradome that Alan Box fell to his death in that year. The passage 8m up was scaled into in 1995, but choked along the fault line in both directions. The climb was rigged from the base as 31.3m, 26.5m, 23.9m, 11.3m, 9.5m - that is 102.5m from the base to the lip.
95 Inlet can be entered on the right of the main river just after passing through 44 Chamber. Fifty metres in, an elliptical tube in the roof can be entered which leads to an increasingly muddy section of phreatic cave. The area appears flood-prone as a sump is bypassed via a muddy tube. The passage then slowly ascends to a 5m climb up to the boulders half way along Armageddon. This partial Armageddon Bypass is 500m long.
A small inlet on the right of Paisley Passage has been pushed for
250m to a large aven. The final small inlet of note is Shrimp Bone Inlet
- the upstream continuation of the vadose rift passage that joins
Duckhams Sump to Rocky Horror. The passage was explored for
some 700m in the initial pushes. During Christmas 1989 the end was pushed
for another 517m to a small, climbable aven. The end apparently lies under
Sima del Escajadillo (088) although no sign of this
(Spanish explored) pot can be found on the surface. During the Easter 2000
expedition, the aven was climbed for some 15m to a blockage with an inlet
stream passage beyond. A subsequent trip removed the blockage and explored
a further 300m.
The slot at the top of the pitch opens out almost immediately to an elongated,
well decorated, oval chamber. Above and behind the slot at the top of the
initial pitch the massive calcited boulder pile continues on up with several
black spaces visible for 15m or so. Climbs up into this were too steep and
slippery to consider with the gear available. At the opposite end, a 3m waterfall
comes down off the edge of a 2m deep false floor only a couple of inches
thick at it's outer edge. There is now a ladder hanging down this, initially
awkward, obstacle.
The passage above is a slightly smaller version of Shrimpbone Inlet, being
generally a joint controlled rift 1.5m - 2m high though in places the stream
meanders turn this into a low tube / bedding. After 50m or so cross rifts
are met which generally go a few metres to small avens (10 - 15m high?).
There are some nice long straws in places. After approximately 150m a junction
is met with a tall rift going right and left. Left, goes to a climb up and
a tall aven. Right, goes through a calcited slot into a chamber at the base
of several large dripping avens (20 - 30m maybe more), named Mongooses
Don't Jump. The stream is not evident in this aven area, though whether
it comes from water percolating through the sand and rocks at the base of
the avens or from elsewhere is not clear. The last survey station in the
terminal chamber is marked with a plastic novelty ice cream container.
***NOTE*** The next team in should take a sturdy new rope and possibly some climbing / rigging gear as the climbing rope may not last another party going up and down it.
Trident Passages, the major set of "side passages", and the ones which could provide a safe route through to Cueva de Carcavuezo (081) in Matienzo, have a length of 2.2km and are entered by climbing up calcite on the right after leaving the inlet at the start of Rocky Horror. At almost the highest point reached a clamber down over boulders to the right reaches a 31m diameter, smooth floored chamber. One outlet descends too tightly, but the main route is a clamber and walk to Mace Head Passage, of stooping dimensions and one of the better looking passages in Cueva de la Hoyuca. Large spiky crystals and calcite formations decorate the 1m diameter tube. Then the passage splits...........? More description needed.
Depths below the Matienzo hillside. Molephoning.
At Easter 95, Pull Up Passage was entered off Quadraphenia and was surveyed for 123m to a sump and narrow rifts.
During summer 2000, Wildlife Series was discovered through a hole at floor level at the start of Quadraphenia, 10m north of the tight squeeze. A crawl leads onto a 6m pitch into a streamway. Downstream, the passage becomes too low. Upstream, the passage splits with all branches choking except for one which turns west and links back to the chamber at the entrance. The passages are mainly stooping or crawling and were surveyed for 320m.
References: anon., 1974b (logbook); anon., 1974a; Fernández
Gutiérrez J C, 1975; anon., 1975b (logbook); Kendal Caving Club and
Manchester University Speleological Society, 1975 (survey and photo); anon.,
1976 (logbook); Cope J et al, 1976 (survey); anon., 1977b (logbook); anon.,
1978 (logbook); Corrin J et al, 1978 (survey and photo); anon., 1979 (logbook);
Addis F et al, 1979; anon., 1980a (logbook); Corrin J et al, 1981b (survey
and photo); Corrin J, 1980; Mills L D J, 1981; Manchester University
Speleological Society, 1982 (survey and photo); Mills L D J and Waltham A
C, 1981 (survey); Corrin J S and Smith P, 1981; anon., 1981 (logbook); Corrin
J et al, 1981a; Corrin J, 1981; anon., 1982 (logbook); Corrin J, 1983c; anon.,
1983b (logbook); Cawthorne B, 1984; Corrin J, 1983b (survey); anon., 1984
(logbook); Barrington P and Hanson D, 1984; anon., 1985b (logbook); anon.,
1986 (logbook); Corrin J, 1987 (survey); material in file; anon., 1987 (logbook);
Corrin J and Knights S, 1988; anon., 1988 (logbook); Davis J and Corrin J,
1989; anon., 1989 (logbook); Smart C, 1990; anon., 1990b (logbook); anon.,
1991 (logbook); Corrin J, 1992a (survey); Corrin J, 1992b (survey); Corrin
J and Quin A, 1992 (survey); Corrin J, 1993 (survey); anon., 1993b (logbook);
Quin A, 1993a; Smith P, 1993 (survey); Corrin J, 1994a; Corrin Juan, 1995b;
anon., 1994a (Easter logbook); anon., 1994b (logbook); Neill A, 1994; Corrin
J, 1994b (survey and photo); anon., 1995a (Easter logbook); anon., 1995c
(logbook); Corrin Juan, 1995a; anon., 1996b (logbook); Corrin Juan, 1997a;
Corrin Juan, 1997b; anon., 1997a (Easter logbook); anon., 1997b (logbook);
Corrin Juan, 1998; Fernández Ortega F, Valls Uriol and Maria del Carmen,
1998 (photo); García José León, 1997 (survey and photo);
Corrin Juan, 1997c; anon., 1999c (logbook); anon., 2000b (Easter logbook);
anon., 2000c (Summer logbook); Corrin Juan, 2001 (photos); anon., 2001c (Summer
logbook); Corrin Juan, 2001a; anon., 2002a (Easter logbook); card for Aug
2002 Roof Passage survey; Corrin Juan, 2003a; Corrin Juan, 2003b; Corrin
Juan, 2003c; anon, 2006d (summer logbook); anon., 2007b (Easter logbook);
anon., 2007d (summer logbook); Corrin Juan and Smith Peter, 2007;; Corrin
Juan, 2007a; anon., 2008c (Easter logbook); anon., 2008d (Whit logbook);
anon., 2008e (summer logbook); anon., 2009a (Easter logbook); anon., 2009c (summer logbook)
Entrance picture : yes
Underground picture(s): Quadraphenia
1 2
Small phreatic tube
Quadraphenia squeeze
Pig's Trotters Chamber
Pitch towards Flash Bulb
Hall
Digital photographs in Gour Inlet
Extension by Mandy Fu, 2008
Digital photographs in Quadraphenia
by Peter Eagan, 2008
Digital photographs in Gour Inlet Extension by Paul Fretwell, Easter 2009
Digital photographs from entrance 2 at the base of the maize field to the Far Stomps area, summer 2009.
Digital photos of the Wildlife Series by Juan Corrin. Click to
enlarge.
Max Dobey in the Wildlife Series |
Max Dobey in the Wildlife Series |
pitch into the Wildlife Series |
Ali Neill on the pitch into the Wildlife Series |
Scanned slides from 1978 by Frank Addis. Click to enlarge.
 Quadra- phenia |
 Quadra- phenia |
 Squeeze into Quadra- phenia |
 Pigs' Trotters Chamber |
 Pigs' Trotters Chamber |
 Quadra- phenia |
 Dyeing the stream near the Astra- dome |
 Astra- dome: setting up helium balloon |
 |
 Astra- dome: helium balloon |
 Astra- dome: thread pulled to fire flash gun |
 Astra- dome: 101.6m high |
 Astra- dome: helium voices |
Scanned slides of bolting in the 100m high Astradome by Alan Box. Click to enlarge.
 Mark Wright bolting with scaling pole. |
 Mark Wright bolting with scaling pole. |
Scanned slides from 1980 by Frank Addis.
 Arma- geddon boulders |
 Arma- geddon boulders |
 Duckhams Sump |
 Rocky Horror |
 Rocky Horror |
 Green Choke |
 Giants Causeway |
 Las Playas |
 1980 photo team |
Digital photos (2001) by Juan Corrin. Click to enlarge.
 Pigs' Trotters Chamber |
 Pigs' Trotters Chamber |
 Pigs' Trotters Chamber |
 Pigs' Trotters Chamber |
 Pigs' Trotters Chamber |
 |
 Quadra- phenia |
 Quadra- phenia |
 Quadra- phenia stream |
 Quadra- phenia |
 Quadra- phenia |
 Quadra- phenia |
 Quadra- phenia |
 Carolina Smith de la Fuente in Quadra- phenia |
 Carolina Smith de la Fuente in Quadra- phenia |
 Quadra- phenia |
 Altern- ative route in |
 Altern- ative route in |
 Altern- ative route in |
Detailed Surveys :
| 1975 | known cave | low res | high res |
| from rescue site | 1975 passages | low res | high res |
| 1975 | Pigs' Trotters & Flashbulb Hall areas (Sub area 1) |
low res | high res |
| 1975 | Gorilla Walk & Chestnut Cave area (Sub area 2) |
low res | high res |
| 1976 | Reincarnation (Armageddon to Rocky Horror) | low res | high res |
| 1980 | known cave survey from BCRA Transactions | low res | high res |
| 1980 | as above in sections ... left half | low res | high res |
| 1980 | as above in sections ... right half | low res | high res |
| 1980 | Third River Inlet with Torcón | low res | high res |
| 1980 | Rocky Horror & Armageddon Bypass | low res | high res |
Detailed Surveys : 21st Century resurvey
| 2008 24th Jan | Hoyuca entrance & Riaño | B&W png file |
| 2008 24th Jan | Hoyuca entrance & Riaño | colour png file |
| 2009 Easter | Hoyuca entrance passages | colour png file |
| 2009 Easter | Hoyuca entrance & Riaño | colour png file |
Line Survey: Four Valleys line
survey. 1997, no detail, but shows water flow.
On area survey :
Survex file : Hoyuca (Oct 2009)
download 4 Valleys System (October 2009)
