The local Salzgewinnungsgesellschaft Westfalen (SGW), a joint venture between
Solvay, Vestolit and
Bayer, is a mining company that extracts salt (
solution mining). It extracts more than two million tons of salt each year, from the
Lower Rhine salt pan (
Solution mining). The
brine is sent via pipeline to locations of the chemical industry in the
Ruhr area (Vestolit/Chemiepark
Marl), on the Lower Rhine (Solvay at
Rheinberg) and to Belgium (Solvay at
Jemeppe-sur-Sambre). The empty salt storages are used to
store natural gas. The salt caverns of Epe are located southwest of the village in the Kottigerhook and in the
Amtsvenn area. The
Natural gas is stored underground at a depth of 900 to 1500 m. The working gas volume of the caverns is over 2.5 m³. This makes the facility, with around 75 caverns, the largest of its kind in Europe. The largest operators are
Uniper (formerly
E.ON Ruhrgas) and
Innogy (formerly RWE). Other companies that store gas are Trianel (since 2008),
Nuon (Vattenfall NL, since 2007), KGE and
Eneco (since 2011). The stored natural gas comes from the Netherlands, the North Sea and Russia, the supply area extends from Hamburg to Frankfurt and the Netherlands. ==Town twinning==