Upper Flood Swallet

Upper Flood Swallet which was originally known as Blackmoor Flood Swallet, is an exceptionally well-decorated cave near Charterhouse, in the carboniferous limestone of the Mendip Hills, in Somerset, England. The cave is part of the Cheddar Complex SSSI.

Upper Flood Swallet
Location	Charterhouse, Somerset, UK
OS grid	ST 50570 55765
Coordinates	51°17′56″N 2°42′37″W
Depth	110m
Length	4.1km
Discovery	3 October 1968[1]
Geology	Limestone
Entrances	1
Difficulty	Extensive system with tight strenuous sections
Access	Leader controlled by Mendip Caving Group; experienced cavers only
Cave survey	MCG Upper Flood Survey 2012
Registry	Mendip Cave Registry[2]

The entrance was revealed in the Great Flood of 1968,^[3] giving the cave its name.^[4] It was dug consistently since then with breakthroughs occurring in 1971, 1972, 1985 and 2006.^[1]

As of September 2008 it is over 3.5 km in length and around 125 m deep.^[5]

The 2006 breakthrough

In September 2006 cavers squeezed through an excavated boulder choke into new passage. In a series of three digging trips they discovered 1.2 km of well decorated cave.^[6]

See also

• Caves of the Mendip Hills