Damped Boerensluis, Krommenieër-Woudpolder

Polder Het Woud was remote for centuries and not many people lived there. It was a navigable polder, which meant that it was only easily accessible by boat. One of the locks was used so often by the farmers of Markenbinnen that it was nicknamed Boerensluis (Farmer's Lock).

Originally, Het Woud was one area with Markenbinnen, part of the municipality of Uitgeest. However, in the first half of the 17th century, new waterways were dug that were necessary to improve the drainage of the Schermerboezem. Markenbinnen was incorporated into the Starnmeer polder, but many farmers lived with land on the other side of the canal, in Het Woud.

Map of the Het Woud polder in 1805, excerpt from a larger map of the waters managed by Uitwaterende Sluizen. North is on the left, the large green area is Het Woud. Marken (now Markenbinnen) is located on the other side of the Markervaart. In the dike directly opposite the village, a lock with a large lock chamber is marked. This is the Boerensluis. Collection Waterlands Archive, arch. no. 1080, inv. no. 365

Due to the drainage, the undiked old land suffered from severe flooding, which is why Het Woud was also diked and reclaimed in 1650-1651. Five sluices were installed in the dikes, including the Boerensluis opposite Markenbinnen and the Woudaapsluis opposite the Tap- or Tochtsloot. This allowed farmers with land in Het Woud to access their pastures. Anyone who wanted to pass through the sluices of Het Woud had to pay a toll, which was used to pay for the maintenance of the sluices.

Polder Het Woud is still a wet area rich in birdlife. For a long time, the Woudaap windmill was the only building in the polder. Photo: Henk Looijesteijn

Because so many forest farmers lived in Markenbinnen, the lock directly opposite that village was used particularly frequently. This is probably where the lock got its nickname, Boerensluis (Farmer's Lock). In the 1960s and 1970s, there were still about ten 'boat farmers' who sailed back and forth with their cattle, hay, and milk. For a long time, the locks were made of wood. When they fell into disrepair in the 19th century, they were filled in or replaced by new brick locks.

The Boerensluis seen from the Markervaart side, around 1980. A small drawbridge allowed people to cross from one side to the other. HHNK Collection

An example of such a sailing farmer from Markenbinnen was Willem Noom (1833-1899). In 1859, he was elected head of the Het Woud polder. Later, he became a member of the water board and, in 1884, dike reeve, a position he held until his death. When the wooden Boerensluis lock was replaced by a stone lock in 1898, a memorial stone was erected with Willem Noom's name at the top. Afterwards, his descendants also served on the polder board.

Memorial stone commemorating the construction of the stone Boerensluis lock in 1898, bearing the names of four of the polder administrators, including dike reeve Willem Noom. The accompanying stone bearing the year and the names of four other polder administrators has unfortunately been lost. Photo: Henk Looijesteijn

Since 1898, there had also been a lock keeper's house at the lock. In 1896, the Boerensluis lock was given an additional task: it became a water inlet point for flooding. The forts of Markenbinnen and Krommeniedijk were part of the Defense Line of Amsterdam, which served to protect the capital from foreign invaders in times of war. The land surrounding the forts would then be flooded. The Het Woud polder was part of the inundation zone.

Map of the Boerensluis in 1979. Since 1896, the lock had also been part of the Defense Line of Amsterdam. In wartime, water let in through the Boerensluis from the Markervaart could be used to flood the polder. Alkmaar Regional Archives, arch. no. 1049, inv. no. 1660

Het Woud was first flooded by the Dutch army in May 1940 when the Germans invaded. The polder was quickly drained again after the war, which lasted only five days. In the spring of 1944, the German occupiers flooded the polder again. This time, Het Woud remained flooded for a year: it was not drained until May 1945. Water plants grew everywhere and for a year the polder was a paradise for water birds.

The lock could be closed with stop logs, which could be lowered into a trench. This prevented the water from flowing back out of the flooded polder. The shed where the stop logs were stored has since disappeared. HHNK Collection

After the war, the Boerensluis remained important for a long time, but around 1980, the water board wanted to fill in the dilapidated lock. In 1983, the Woudpolder was opened up by a road, meaning it was no longer a navigable polder. Only Willem Noom's great-grandson still used the lock frequently, but his cattle farm was relocated. Restoration would have been very expensive and, moreover, the waves caused by shipping traffic on the Markervaart canal posed a danger to the dilapidated lock.

With full milk cans on his way home to Markenbinnen: in 1981, 25-year-old Nico Noom sails from Het Woud into the lock that was built when his great-great-grandfather was dike reeve. Nico Noom Collection

In 1984, the Boerensluis was therefore filled in. The lock walls were preserved as a monument. The memorial stones were to be moved so that cyclists and walkers could see them clearly. A memorial stone was also placed to mark the filling in of the lock. Unfortunately, one of the two older memorial stones was lost. The Woudaap lock is now the only remaining lock in Het Woud.

The submerged Boerensluis for...
...and during the restoration
After nearly forty years, the submerged Boerensluis lock was in need of restoration. In the fall of 2023, broken natural stone was repaired with special mortar and cracks in the brick walls were repaired. Photos: Henk Looijesteijn
The filled-in Boerensluis after restoration, September 2024. Photo: Jan Peetooom

Extra

The dammed Boerensluis is discussed in the second episode of the documentary series Langs de Hollandse Waterlinies(Along the Dutch Water Lines) , minutes 09:34-11:41.

In the clip below, you can see the Boerensluis in operation. This clip is taken from a longerfilm about the last sailing farmers of Het Woud, the Nooms from Markenbinnen.

The Boerensluis is a photogenic stop on the Krommenieër-Woudpolder route (North Holland Walking Network).

Cycling along the Boerensluis is also a good option. A beautiful route is the Jubileumfietsroute(Laag Holland).

Another beautiful route is the Crommenije-Stelling van Amsterdamcycle route (Oer-IJ).

At the lock keeper's house at Markervaart 2, there is a rest stop where you can find coffee and tea, soup, tire repair kits, and a first aid kit. Friends on Bikes can also spend the night there.

Conservation is made possible in part by the province of North Holland.

Muffled Farm Lock

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