Qualla: Tjaskers in Friesland

Tjaskers in Friesland: Introduction

Sat, 16 May 2026 00:00:00 GMT

Photo credit Foppe01, CC BY-SA 3.0. Picture the silhouette of a Dutch windmill — sails turning above a brick tower, four storeys tall, smock-shaped, monumental. Now shrink it. Take away the tower. Take away the cap. Take away the miller's lodging, the gallery, the brick. What you have left, leaning at a deliberate angle in a corner of a wet meadow, is a tjasker: four sails, a tilted wooden shaft, and an Archimedes screw drinking water from one ditch and pouring it into another. There are thirteen of them still working in Friesland, and they are the smallest practical windmills in the Netherlands.

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Image: Foppe01 | CC BY-SA 3.0

Tjaskers in Friesland: Less, on Purpose

Sat, 16 May 2026 00:00:00 GMT

Photo credit Willemjans, CC BY-SA 3.0. A poldermolen — the big drainage windmill — is a machine designed to dewater an entire polder, sometimes thousands of hectares. A tjasker is the opposite philosophy. One farmer, one wet plot, one ditch. The whole apparatus might span five meters from sail tip to sail tip. The Com...

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Image: Willemjans | CC BY-SA 3.0

Tjaskers in Friesland: Paaltjasker and Boktjasker

Sat, 16 May 2026 00:00:00 GMT

Photo credit Willemjans, CC BY-SA 3.0. Two forms survive. The paaltjasker stands on a single vertical post — paal means pole — and the whole tilted body of the mill swivels on top of it like a weather vane carrying its own engine. The boktjasker rests on a wooden trestle, the bok, a sturdier A-frame that holds the sha...

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Image: Willemjans | CC BY-SA 3.0

Tjaskers in Friesland: Built in 1915, Still Working

Sat, 16 May 2026 00:00:00 GMT

Photo credit Agnes Monkelbaan, CC BY-SA 4.0. The tjasker between Workum and It Heidenskip is the rarest of them all. Farmer J. Noordenbos commissioned it in 1915 from millwright R. W. Dijksma. The mill has stood on the same plot ever since, draining the same meadow, turning when the wind allows. It is the only tjasker in th...

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Image: Agnes Monkelbaan | CC BY-SA 4.0

Tjaskers in Friesland: The Builder Who Did Not Stop

Sat, 16 May 2026 00:00:00 GMT

Photo credit CrazyPhunk, CC BY 3.0. Roelof Dijksma kept building tjaskers into the 1970s, when almost no one else still knew how. He built the De Deelen mill in 1973 — fifth in a postwar series, sails covered in wooden slats instead of canvas. He was building one for Staatsbosbeheer at Veenwouden in 1975 when he di...

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Image: CrazyPhunk | CC BY 3.0

Tjaskers in Friesland: Why They Still Matter

Sat, 16 May 2026 00:00:00 GMT

Photo credit Taks, Public domain. None of these mills is needed in the engineering sense. Electric pumps move more water faster, and Staatsbosbeheer could regulate its nature reserves with a switch. But the tjaskers turn anyway, in De Deelen and De Rottige Meenthe and Stobbepoel, because someone built them, someo...

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Image: Taks | Public domain