
Coal blending bunker
Kohlenmischhalle
Raw post-war concrete, 26 metres to the conveyor bridges, and an echo you can hear your own footsteps travel through. Not an easy room — the right one for the right idea.
- Capacity
- 500standing
- seated
- —
- m² / m
- 1,120 / 26
- Day rate
- €11,400
Production day, 500 guests standing, including the acoustic treatment package.
Down the shaft
Read this venue the way the pit was worked
Scroll and the page descends. The gauge on the left reads the live depth in metres; each level of the old shaft carries one part of what you need to know about the building above it.
Schacht Dellwig II · 0–640 m
Pit bank · Depth ±0 m
You enter at the top and walk down
The only public way in is the old vehicle ramp, which spirals a full turn before it reaches the floor. Guests spend ninety seconds descending in near darkness with the room opening up beside them. We have never found a better opening sequence, and we did not design it.
First level · Depth 95 m
Twenty-six metres of concrete, four ways
Four unbroken concrete faces, no windows, no interruptions: the bunker is effectively a projection instrument. Large-format video work here does not need a screen, and the board-marked surface takes light in a way a white wall never will.
Second level · Depth 240 m
The echo is 6,1 seconds and it is not negotiable
Untreated, a spoken word is unintelligible in here. Our acoustic package — hanging absorbers plus a distributed delay system — is included in the day rate and is not optional for any format with speech. Music with a slow tempo can use the reverb; a moderated programme cannot.
Third level · Depth 430 m
Built in 1954, and it shows
This is post-war concrete, poured fast during the coal boom when the Ruhr was rebuilding a country and importing labour to do it. It is not a beautiful building and was never meant to be. Programming it as pure aesthetic backdrop misses what it is; most of our clients here work with that tension rather than against it.
Shaft bottom · Depth 640 m
Cold, loud, and €11,400 a day
A production day for 500 standing guests is €11,400 including the acoustic package, the ramp lighting and site management. Two things we insist on: guests are told in advance to dress for 12 °C, and no format is booked here that needs seated comfort.
Technical data
- Bunker
- 1.120 m² floor, 26 m internal height
- Capacity
- 500 standing only — no seated layout
- Acoustics
- 6,1 s reverb untreated; treatment package mandatory for speech
- Projection
- Four 24 m concrete faces, no windows
- Access
- One vehicle ramp, one stair core, no lift
- Climate
- Cold year-round, 11–14 °C — brief your guests
Produced here
2023 · Concert
Betonresonanz
A slow-tempo concert written for a 6,1-second reverb and performed once, for 500 standing listeners.
Ruhrfunk Kulturredaktion
Walk the building before you plan it
Site visits take about ninety minutes and include the parts we will say no to. Evenings and Saturdays are fine.
Book a site visit