The Berlagebrug (; ) is a bascule bridge over the river Amstel in Amsterdam, Netherlands. The bridge was commissioned by the Amsterdam municipality and designed by engineer (1899-1980) and architect Hendrikus Petrus Berlage (1856–1934); it was named after the latter. It was constructed from 1926 to 1931 and officially opened on 28 May 1932. It has been designated as a Rijksmonument (National Heritage Site) since 11 May 2008. The bridgekeeper's house carries the address Amsteldijk 134.
The team was confronted with three main design challenges: the Amstel could not be closed to ship traffic during construction; the span was 100 meters; and there was a considerable difference in height between the raised neighbourhoods of the Western river bank and the lower levels on the eastern river bank. The bridge was designed as a bascule bridge, to allow both electric tram traffic and tall ships to cross (though the tram tracks were not taken into service until 1939). Construction costs were estimated at 1.6 million Dutch guilder, but at that time it was already unlikely to be completed by 1928.
The banks on either side were integrated into the design, with boathouses on the Weesperzijde (east) and a marina on the Amsteldijk (west). The control tower (placed eccentrically) and the bridgekeeper's house had been designed as round buildings, but this was changed to rectangular. The boathouses on the east side (which were built after World War II) end at the Schollenbrug, which was part of the design and is listed with the Berlagebrug as the Rijksmonument. Sculptor Hildo Krop was contracted to provide ornamentation for the bridge; his glazed earthenware relief of the Genius van Amsterdam (the city's protective spirit) was placed on the west side of the bridge's control tower in 1932. The relief was made by a firm in Delft, De Koninklijke Porceleyne Fles. The figure stands on top of three green bands which symbolize the city's Grachtengordel and come together in the city's banner. The middle of the bridge's five spans is the bascule bridge. Berlage used red bricks from Limburg, alternated with yellow granite from Bavaria. Green glazed stone was used as well, and the wrought iron railings were painted black and red, as were the light posts and the electricity poles for the streetcars.
Though the design was complete by 1928, unfavourable soil conditions prevented construction to begin immediately. In 1929, the soil was strengthened on the western bank, with the eastern bank following soon after. When construction began, a small sand deposit site in between the Berlagebrug site and Schollenbrug saw some popularity with Amsterdam residents as an urban beach.
At the time of the opening, the bridge, on the east side, connected only to the Weesperzijde street. Still, immediately after opening, there was noticeably less traffic on the nearby Amstelbrug, and this had been one of the goals. On 15 October 1939 the connection to the Mr. Treublaan was opened, cementing the bridge's use in connecting the Rivierenbuurt and the Amstel railway station.
At the start and finish of World War II in the Netherlands, the Berlagebrug was the entrance into Amsterdam for foreign troops. On 15 May 1940, German troops arrived and were greeted on the Berlagebrug by Reichsdeutsche and Dutch fascists (members of the National Socialist Movement in the Netherlands). On 8 May 1945, Canadian liberators entered the city via the same bridge.
Opening and use
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