RAG made its first gas discovery in Puchkirchen in 1956.
Conversion of the gas formation into a storage reservoir began in 1982 and was completed in 2009 after a number of expansions. During the summer of the latter year the Puchkirchen facility was linked with the Haag reservoir. At present the facility has a maximum working gas volume of some 1.1 bn cu m (equivalent to 12.5 TWh), and injection and withdrawal capacity of 520,000 cu m/hour (6 gigawatts, GW).
