A crawl in through collapsed boulders leads to walking size mine passage. Follow for lOOm until a junction is reached. To the left a scramble over mine debris leads to the first pitch in Sara. The bottom of this 6.4m drop lands on a sloping boulder floor and the way on is via a 2m climb and a crawl. Branching to the left the second pitch of 7.2m is reached. From the bottom of this, a slope of mine rubble leads to the next pitch of 11.7m, narrow at the top, but opening out straight away. This lands part way up a narrow rift, which soon becomes low as well as tight. It joins another inlet passage at a difficult 2m climb. A short traverse leads to the head of the 180m Heinons Shaft. This can be descended rebelaying at ledges in steps of:- 28m, 32m, 35m and 88m.
The 88m pitch lands on a sloping, boulder floor. In the top most corner a ladder climb down a loose boulder tube leads to a free hanging 52m pitch in an impressive rift. The pitch lands on a large boulder floor. The route on is up the boulder slope and then down to the right. After a short distance the streamway is rejoined just before the next pitch of 12m, which is wet at the bottom. The water soon sinks into boulders and the way on is up to the right. At the top of a muddy boulder slope is an awkward 2m climb down to the head of a 24m drop. Free hanging all the way the pitch lands on a large boulder ledge. Climbing down to the chamber floor the streamway is reached. The way on soon becomes low and a crawl for lOm leads to a 2m climb down into a large pool. The way on is to traverse at various levels until an 8m pitch is reached. This lands in a pool in a moderately sized chamber, the site for our underground camps.
Continuing on from the chamber soon leads to more traversing and climbs until after 50m the passage widens and a short duck is reached. From the other side of the duck a series of short cascades and climbs lead to a muddy ledge which must be traversed to reach the head of the next pitch which is 9.7m long. This lands in large, water washed passage and the way on is down a series of sporting pitches the lengths of which are 4.8m, 9.5m, 5.6m, 15.2m, 4.6m, 13.7m and 11.7m, the last of which is particularly wet due to inlets entering from high in the roof. A climb, followed by a short wak and traverse lead to the head of an impressive 43m pitch which again is wet at the bottom. Pitches of 8.lm and 7.8m follow immediately. From the bottom of the 7.8m pitch the dry oxbow route is taken to the head of a dry 6.2m pitch. After only lOm the next drop of 22m is reached. This lands amongst spray and boulders in a large chamber.
The way on is opposite the last pitch, along a narrow rift passage. The floor soon drops away and a traverse for lOm leads to the head of the next pitch of 23.8m. The pitch lands under the full force of the water on a small ledge. Pitches of llm, 9m and 4m follow rapidly. At this point the cave takes a more horizontal line in impressive sporting meanders. After about 80m a small chamber is reached. The way on is up and over a large boulder. At this point the passage narrows and tbe way on involves a series of traverses, climbs and tight squeezes. Not far after the last climb of 5m the passage once again opens out into generous proportions. Several inlets enter the cave at this point contributing significantly to the size of the streamway. Continuing on at stream level soon leads to the last pitch of 8.5m. This lands in a spacious, mud floored chamber. Walking to the far end of the chamber the streamway enters a huge rift passage. After a short distance the passage is blocked by large fallen boulders. The easiest way on is along a low wet crawl to the left of the passage, after 30m the crawl rejoins the main passage. Only lOm on from this the Sara sump is reached.
A bypass was searched for without success.
