Updated 24th April 2012; 20th May 2017; 1st May, 10th December 2018; 12th May 2019; 10th, 19th, 29th September 2021; 9th, 23rd, 30th September 2022; 9th February, 12th March, 26th September 2023; 8th February, 3rd, 11th May 2024

   The entrance is in a tree-lined depression and has been wrongly tagged "873". Originally, a drop between boulders ended in a choked chamber. At Easter 2018, the entrance was enlarged; an alternative entrance dug open and sub-phoned (site 4732); a nearby draughting route excavated to walking passage and a run-in, and the whole system surveyed to a length of 82m.
   Digging continued in the autumn 2018 when a large number of spiders were noted and a probable bear tooth excavated. More digging was carried out at Easter 2019 and bat droppings were noticed along with beetles eating the remains of beetles in the guano. Work continued in 2020 and a lower series was explored in the summer 2021 - see 4732.

   In the summer 2022, the cave was connected into the Four Valleys System at Armageddon and Shrimp Bone Inlet in Cueva Hoyuca (0107). The updated survey for Decepción appears below and on site 4732. Photos and videos of the cave exploration and connections appear on the page for site 4732, the "main entrance" for Disappointment Pot. A full description appears in site 4732.
    Site 0252/4732 finished at 2335m in length and 110m depth as it joined Hoyuca. This addition, along with surveys around Sewers of Doom in Carcavuezo (0081) has increased the length of the Four Valleys System to just over 70km. (September 2022).

References:anon., 1981a (logbook); Corrin J, 1983c; anon., 1991 (logbook); anon., 2012b (Easter logbook); anon., 2017b (Easter logbook); anon., 2018b (Easter logbook); anon., 2018d (autumn logbook); anon., 2019b (Easter logbook); anon., 2020c (Spring, summer logbook); anon., 2021c (summer logbook); anon., 2022c (summer logbook); anon., 2024a (January, February logbook); anon., 2024b (Easter logbook)
Entrance pictures : Easter 2012 : Easter 2017 : Easter 2018 see also site 4732
Underground pictures: Easter 2018 : autumn 2018 : see also site 4732
Detailed Survey : Easter 2018, including 4732 : amended after autumn 2018 : after summer 2021 pdf: Plan and Elevation : after summer 2022 (minor updates 16/1/23; 6/3/2023)
after summer 2023 : annotated survey pieces - Easter 2024 : after Easter 2024
Line Survey :
On area map : adjusted survey on map with Hoyuca centre line
Survex file : in the 4VS area (now) : 0252 : 4 Valleys System lite (after Xmas 2023) : 4 Valleys lite (now)