U.S. construction spending fell by the most in seven month in June as investment in private construction projects tumbled to a more than 1-1/2-year low. The Commerce Department said on Thursday construction spending dropped 1.3%, the biggest decline since last November. Data for May was revised up to show construction outlays falling 0.5% instead of decreasing 0.8% as previously reported. Economists polled by Reuters had forecast construction spending rising 0.3% in June. Construction spending fell 2.1% on a year-on-year basis in June. Spending on private construction projects dropped 0.4% in June to $962.9 billion, .