We were called out due to leaks on a shutoff valve and prv in the utility area due to freeze breaks. We replaced the shutoff located downstream of the PRV, and the PRV. We then found that the main shutoff located where the water enters the building in the general area had failed and would not open. We also replaced this main shutoff valve and restored water to the warehouse. We recommend that in the future, a heat source is placed in this utility room when temperatures are below freezing.