Liam Ewald
Architecture · 2025

The Rhine Timber Corridor

A water-powered timber mill on the Rhine, built to be repaired rather than defended, where the river both delivers the wood and periodically takes the building apart.

Role
Design, drawings, and site research
Context
Columbia GSAPP, Architecture Studio II with Abraham Murrell
The Rhine Timber Corridor cover image

The Rhine begins as alpine melt and arrives downstream carrying whatever the mountain has shed: blowdown timber, debris, and in a bad season the contents of a glacial lake. This project takes that delivery as a given rather than a hazard, and puts a mill where the river already does the work of bringing wood down.

Power comes off the current. The wood is seasoned slowly on open decks rather than kiln-dried, which means the building is mostly air and racking, and means its useful volume is the part most exposed to the water. That trade is the argument: the structure earns its efficiency by accepting that it will be hit.

So the building is detailed in two registers. Into the hillside, gabion walls packed with offcuts and rejected logs — heavy, immobile, and made of the mill’s own waste. Over the water, inverted timber trusses and piles light enough to be replaced in a season. Nothing is designed to resist a flood outright. The building is designed to come apart in a known order and be put back together, which is how the valley has always worked.

Site research at Galtür in the Austrian Alps mapped what that rhythm actually looks like: avalanche reach, debris flow, waterlogging, and the snow nets and snowbreak forest already built to manage them. The village records its floods by painting the dates on its walls.

The mill seen from the valley slope, its drying decks stepping out over the water on slender timber piles.
The mill from the slope above, drying decks reaching out over the river.
Long section through the mill, cutting from the hillside gabion wall through the saw floor to the open drying decks.
Long section. The gabion mass anchors the hill; everything over the water is light enough to lose.
Exploded axonometric separating roof shells, drying racks, saw floor, water-drive shaft, and the gabion base into layers.
Exploded axonometric. Each layer is assembled to come apart in the order it is likely to fail.
Annotated survey drawing of the alpine valley at Galtür, mapping glacial lakes, avalanche paths, debris flows, snow nets, and the settlement below.
Site research at Galtür, Austrian Alps. Avalanche reach, outburst floods, and the defences already built against them.

Source documents

Scanned book page showing the same half-timbered farmhouse twice, dry in a ploughed field in 1978 and standing in open water in 1983.
Die Unterau, 1978 and 1983. The same house.
Scanned book page with two colour photographs of farm buildings standing in floodwater, captioned 1988 Hofgut Schaaf.
Hofgut Schaaf, 1988.
Scanned book page reproducing a hand-drawn map of the Rhine floodplain around 1710, with the river meadows named and numbered.
Die Auenkarte um 1710. The meadows, named.

Source: local flood chronicle for the Ginsheim and Trebur reach of the Rhine. Pages reproduced as research material — CREDIT NEEDS THE PUBLICATION TITLE, AUTHOR AND YEAR BEFORE THIS GOES LIVE.