Expeditions done by SPE (Portuguese Speleological Society)

The hydrological year of 2008-09 has overlapped with SPE’s 60th birthday with special focus on the underwater exploration of the cave, eighteen years after the 1991 dives.

• 350 meters of new underwater galleries mapped
• 4 service pumps
• 200 meters of hose installed
• 700 meter of electrical cables
• 160 pumping hours
• 7 dives
• 730 minutes of underwater exploration
• 47 meters of maximum depth
• 207 meters new depth for the system

More information at:
http://www.spe.pt/espeleologia/Expedicoes-de-Espeleomergulho/Trabalhos-no-Sistema-Moinhos-Velhos-Pena-Contenda-2009.html