天坑
The Shaft
Basic Cave: CDAA site rating [1] (Rating as listed in the CDAA site directory.). 以下分类采用该认证体系自身的命名方式，用于描述该潜点所需的培训级别。
A huge water-filled chamber under a paddock near Allendale East, entered through a roughly one-metre hole. Closed after four deaths in 1973; now dived by CDAA members only, through approved guides.
The Shaft is a private sinkhole whose only opening is a small hole in a paddock. Divers and equipment are lowered separately about seven metres to the water surface, then descend into an oval chamber that a 2017 press report puts at about 140 m long. A rock pile tops out around 36 m, and two tunnels lead deeper: one to the north-west to about 80 m, and an eastern tunnel, past restrictions near 57 m, to a rock pile at 124 m.
The site was popular with divers in the late 1960s and early 1970s but closed in 1973 after four divers died there. The CDAA says public reaction to those deaths was the main reason the association was founded to regulate cave diving. A CDAA Research Group mapping project completed in 1984 led to renewed access, organised by a group of guides who set schedules and standards for qualified members.
环境
One very large, clear freshwater chamber below a dry entry shaft, with a rock pile and two deep tunnels.
仅供方位参考，不可用于导航。空心圆点为大致位置。
本页所有信息及其来源 (11)
| 信息条目 | 状态 | 来源 |
|---|---|---|
| The CDAA site directory lists The Shaft (5L158) as Basic Cave on private land. | 已核实 | [1] |
| An Australian Speleological Federation team explored the eastern tunnel in 2002-03 to a rock pile at a maximum depth of 124 m.Press feature quoting a member of the 2002-03 team; no published survey was opened. | 已报告 | [4] |
| The roughly one-metre entrance hole opens into a dry chamber that drops about seven metres to the water surface. | 已报告 | [4] |
| The main chamber spans about 140 m, a rock pile begins around 36 m, and a north-western tunnel reaches about 80 m.2017 press figures. | 已报告 | [4] |
| The Shaft was closed in 1973 after four divers died there, and public reaction was the main reason the CDAA was formed. | 已核实 | [2] [3] |
| A CDAA Research Group mapping project was completed in 1984 after lengthy negotiations with the owners.The 2017 press report says the 1984 project used 73 mapping and photographic dives. | 已核实 | [2] [4] |
| The landowner requires access via approved guides who are CDAA members. | 已核实 | [2] [3] |
| A fee is payable directly to the guide on the day of the dive.Amount not published. | 已核实 | [2] |
| The site is entered by wire rope ladder or rope access, decided by the site access guide on the day. | 已核实 | [2] |
| Coordinates are the Allendale East locality centre, not the entrance.Private site; entrance location withheld. | 已核实 | [5] |
| Coordinates are the Allendale East locality centre, not the entrance.Private site; entrance location withheld. | 已核实 | [5] |
已核实：来自我们直接查阅的官方或主要来源。已报告：仅来自二手来源。来源存在冲突：注释中列出两种版本。可能已过时：我们找到的最新来源已有一定年代。
由我们根据上述来源以自己的文字整理撰写。 提交更正