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2017 Sistema Cheve
2013 J2
2010 J2
2009 J2
1998 Wakulla 2
1994 San Agustín
1987 Wakulla Springs
1984 Peña Colorada
1981 Agua de Cerro
1980 Río Iglesia

2010 J2 Expedition

The 2010 J2 expedition was held from the end of February through mid-April to explore Last Bash in the upper Aguacate Valley. Last Bash had been previously explored to a depth of 500 meters and was less than a kilometer from connecting to J2. The main goal of the expedition was to connect Last Bash to J2, which was hoped to provide a faster route to Camp 3 from the surface and to bypass a flood-prone section of the main J2 route. Once the connection to J2 had been accomplished, several leads deep in J2 were to be explored.

The 2010 J2 expedition was successful in connecting Last Bash to J2, which connected to the infeeder canyon that acts as the Camp 2A water supply. The connection shaved two to four hours off the transit time to Camp 2A and allowed several teams to explore leads based out of Camp 3 during the expedition. The high-airflow climbing lead that was discovered at the end of the 2009 J2 expedition was explored, and led further up an infeeder into an area now called "From Russia with Love." The lead ends in a 30 meter tall dome that is suspected to connect to a known cave near San Miguel Santa Flor.

The J2 Cave System is now 13.5km long and retains its previous depth of -1222m. J2 remains one of the world's most challenging and formidable caves. With a lack of easy routes through the mountain, plans are being made to continue the dive exploration of the sumps at the bottom of the cave that will connect to Sistema Cheve, and ultimately may create the deepest cave in the world.

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