Two more distribution centers on the way in southern Dallas County IAC Properties and Ridgeline Property Group plan buildings near Interstate 20. Ridgeline Property Group has already built a speculative warehouse project in DeSoto.(Stream Realty Partners ) The area along Interstate 20 has been one of the hottest distribution districts in the state. Now Illinois-based IAC Properties is jumping into the market with plans for a large shipping hub. The industrial developer plans to build an almost 435,000-square-foot warehouse at 7558 Beckleymeade Avenue south of I-20. The $16.5 million is to start later this year and will open in 2022, according to planning documents filed with the state.