In the 1950s and 1960s, deep geological bores to depth 150m were drilled in contrast to former surface wells (to depth 10-15m). The sources S1 and S2 from the 1950s, when research works were reviewed and directed by J. Šilar, had to be replaced by new bores. The damaged bore S2 (1952) in 1966 replaced by the bore S2A - Spring Petr (named after the assistant manager of Lázně Jeseník) and new bore S7 - Spring Vladimír named after hydrogeologist RNDr. Vladimír Řezníček who controlled the works in the1960s in cooperation with Ing. RNDr. Vladimír Pelikán, Dr.Sc.

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