Iowa joined California, Indiana and Missouri as the four states that lost the most construction jobs in January, the Associated General Contractors of America said. According to the construction industry trade group, Iowa shed 2,600 construction jobs last month, based on data from the U.S. Census Bureau. California lost 6,600 jobs, Indiana lost 4,300, and Missouri lost 3,330. For the year ending in January, Iowa lost a total of 400 construction jobs.