The Den Deel pumping station is the first subsidence pumping station that was taken into use in 1992. The construction took place between 1988 and 1992. The original client was the Hunsingo Water Board, which merged with the Electra, Noordenveld, Smilde, Westerkwartier and Ommelanderzeedijk water boards to form the Noorderzijlvest Water Board in 1995. The pumping station is named after the Den Deel area, north of the Boterdiep.
The pumping station is located in the Boterdiep between Middelstum (Fraamklap) and Onderdendam. The adjacent lock was built simultaneously with the pumping station and visually forms a whole with it. The walls of the pumping station are largely made of glass, with a gable roof resting on four steel columns above. From the long-running provincial road N996 you can look right through the pumping station and at the machines in the pump hall.
The pumping station drains the deepest part of the subsidence tray, the first shell of the electricity chimney breast and forms the water level separation between the two inner shells. There is a fish passage in the pumping station, which allows fish migration in both directions. A small pump provides a continuous flow of water in the passage from the low water side to the high water side via various tanks. The water level is regulated with slides in the containers. Recently, operational management has been made fully automated and remotely operable, including by installing frequency converters and installing a new control system.