The winning design by OS31 / OS31

Structure will host 60 diners at a time in Winnipeg, Canada

It is set to be the ultimate in cool dining experiences: a pop-up restaurant on a frozen river where the winter temperature rarely reaches much above -25C.

A pioneering lightweight design by British architects has won an international competition to build an eatery at Winnipeg in Canada. Situated at the mouth of the Assiniboine and Red Rivers – once the main conduit in the North American fur trade – the new structure will play host to some of the continent’s leading chefs serving up nightly à la carte menus.

Architect Tony Broomhead, of Sheffield practice OS31, said the ice during the Canadian winter is typically two feet thick, making a robust platform on which to build.

But despite the chill, the food is guaranteed to arrive at tables still warm - even though diners should come prepared.

“There is some high-level heating and some heat that comes from the kitchen, but essentially you will need to wrap up warm. If we can get the temperature down to zero then it will be quite a cosy environment,” he said.  

The prefabricated structure, entitled RAW:almond, is believed to be the first ever building designed specifically to be situated on a frozen body of water. It will play host to 60 diners per sitting between January and March next year, when the thaw begins.

It is made from aluminium scaffolding poles and a high-tensile fabric interior. “The lighting was important because it is primarily open at night and there is not very much daylight during the day at that time of year. It is about being a social place as much as being a very expressive structure,” Mr Broomhead added.

The cross-shaped building complete with terrace is inspired by the joining rivers where it is situated and also reflects the architecture of a nearby bridge. The interior was described by judges as resembling “drifts of snow” – the light form the interior illuminating the at times bleak Canadian landscape.

It will also have to withstand poplar storms including vortex which saw the mercury plunge to -37C.