Stahl Construction Co., a Twin Cities-based construction management firm, announced it has opened an Iowa branch office in Urbandale at 2961 100th St., Suite 2. The company currently has more than $78 million in construction projects under way in Iowa, among them a renovation and expansion of Urbandale Middle School and construction of the new 283,000-square-foot Ankeny Centennial High School. Iowa project manager Bill Harger will head the new office. Harger has been in the construction industry for 18 years and previously managed the Waukee office of Oakview dck LLC.