PITTSBURGH (KDKA) — A goal by Evgeni Malkin was the only bright spot for Penguins fans the last time their team played outdoor hockey at Heinz Field.

The Washington Capitals won that game.

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The “Stadium Series” returns to Heinz Field Feb. 25, for a game against the Flyers. The ice-making truck is ready and waiting. NHL spokesman Dan Craig says every square inch of the truck is used.

“It’s a super-efficient refrigeration system. Plus, the ice pour itself is probably the best in the world,” he says.

The ice-maker is actually glycol, piped through a giant hose into the stadium.

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“The fluid, the glycol, goes through at about 900 to 1,000 gallons a minute,” Craig adds.

First, though, the crew must lay down a base. But laying the foundation is merely the first link. It will take several days before Heinz Field is turned into a temporary hockey rink. The next step?

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“It’s actually a mat that has piping, as you’d see piping under the floor at PPG Paints Arena,” says Penguins Chief Operating Officer Travis Williams. “It’s actually a mat of pipes that have all the freezing material that goes through that and builds the ice on top of it.”