This distribution center supports stores in the Upper Midwest. The product mix called for expansion of the existing freezer and cooler areas with addition of a cooler storage area and additional dock area. Design and construction challenges included installation of new system components with start-up and pull-down without interruption to existing refrigerated areas. Once the new freezer, ice cream freezer, cooler and dock areas were down to temperature, existing freezer and cooler areas could be converted. The existing control system required modification and expansion to keep the existing system components operational during installation of the new one.