From 1905 onwards the company also had an operating agreement with the Celle–Bergen Light Railway to use the section of track from Celle Nord–Celle Vorstadt.

The extension of the Bismark-Gardelegen-Wittingen Light Railway from Diesdorf was also laid into this station on 1 August 1909.

Initially the desired growth in traffic failed to materialise and it was not until the two pits were amalgamated that demand increased; the transportation of potash developing into the mainstay of the line.

Various munition works and a Luftwaffe air base near Dedelstorf generated additional business during the 1930s and in the Second World War.

In addition to workers travelling to the Mariaglück potash mine, excursion traffic was of great importance.

For the construction of the Elbe Lateral Canal in 1973 the line between Alt Isenhagen and Glüsingen was rerouted and led over a bridge.

The operator of these trains to the mid-1990s was the Brunswick State Museum Railway Company (Brunswickische Landes-Museums-Eisenbahn-Gesellschaft).