LARCHWOOD, Iowa — Water from frozen water pipes that burst has damaged a casino resort in northwest Iowa.

Subzero temperatures outside froze the fire system pipes at the Grand Falls Casino & Golf Resort in Larchwood. The water loosed last Saturday damaged 18 of the hotel’s 97 rooms, a meeting room and the men’s portion of the spa.

General Manager Sharon Haselhoff told the Iowa Racing and Gaming Commission on Thursday the repair costs could run between $500,000 and $1 million.

Haselhoff isn’t sure when the repairs will be finished but says everything at the resort casino is back in operation, including the fire suppression system and the spa.

The casino opened in 2011.