Bob Brown Chevrolet broke ground today on a $20 million car dealership facility at 3600 111th Street in Urbandale. The auto dealer, which will relocate to the southeast corner of Douglas Avenue and Iowa Interstates 80 and 35 from its current location on Merle Hay Road, plans to construct more than 100,000 square feet of showroom space and hire 30 people. The dealership building is expected to open next spring.