ST. PAUL — The opening of a popular St. Paul ice rink may be delayed after thieves stole copper pipes.

Thieves stole 64 copper pipes from the rink outside the Phalen Recreation Center over the weekend.

A St. Paul Parks and Recreation spokesman said the pipes make up the cooling system of the refrigerated rink and go under the ice, which isn’t in place yet.

Replacing the stolen copper with the same product could cost up to $30,000. Instead, the city is turning to a cheaper, plastic product estimated to cost no more than $20,000 in materials and labor.