The fort on Middenweg is part of the Defence Line of Amsterdam and is part of the UNESCO World Heritage Site 'Hollandse Waterlinies'. This defensive line of forts was built 15 to 20 kilometres around Amsterdam between 1880 and 1914.

The fort is located on the southern ring dyke of polder De Beemster. The North Holland Canal runs behind the fort and the dike. An inundation sluice for the Beemster is located east of the fort. The purpose of the fort was to seal off and defend the accesses formed by the Middenweg and Zuiddijk roads. The original situation around the fort has been preserved: open polder landscape outside the Defence Line and the dike and canal inside the Defence Line.

The fort was used as a warehouse complex from unknown date until after 1974 and on 1-12-1950 as a gunpowder magazine. Later used by Eurometaal (vm Artillerie Inrichtingen); still in use in 1980/1983. Narrow gauge track was present for this purpose.

Facilities for a Detention and Residence Camp for political offenders were partially made in 1946 but the fort was not used as a camp.
Flora & ...

The fort is located on the southern ring dyke of polder De Beemster. The North Holland Canal runs behind the fort and the dike. An inundation sluice for the Beemster is located east of the fort. The purpose of the fort was to seal off and defend the accesses formed by the Middenweg and Zuiddijk roads. The original situation around the fort has been preserved: open polder landscape outside the Defence Line and the dike and canal inside the Defence Line.

The fort was used as a warehouse complex from unknown date until after 1974 and on 1-12-1950 as a gunpowder magazine. Later used by Eurometaal (vm Artillerie Inrichtingen); still in use in 1980/1983. Narrow gauge track was present for this purpose.

Facilities for a Detention and Residence Camp for political offenders were partially made in 1946 but the fort was not used as a camp.
Flora & Fauna are of great natural value. Due to strong temperature changes on the barren fort site, distinct dune vegetation occurs here. To be found are, among others, Wall Pepper, Sand Wall, Common Wallow, Jacob's Cross and Rough forget-me-not. Also found are Wolf's-foot, Red-water-herb and Pennywort. Long-eared owl and freshwater prawn are also residents of the nature reserve around the fort.

A special feature of this fort was the washroom for the soldiers. An ingenious system cleans rainwater before it enters the wash basins. The sinks themselves can be tipped over so that the dirty water flows away.

The Fort on Middenweg can be admired but not visited.

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