After 13.5 inches of rain fell in 30 hours in Alstead, a culvert on Cooper Hill Road was overwhelmed, and a wall of water tumbled toward the downtown. Subscribe to WMUR on YouTube now for more: http://bit.ly/1lOjX9C Get more Manchester news: http://www.wmur.com Like us: / wmur9 Follow us: / wmur9 Instagram: / wmur9