Background: Approximately twenty-five years ago, RIDOT stopped using granite curbing as a. standard, with the exception of bridge projects. The primary motivation was cost, as precast. concrete, the replacement, was cheaper to purchase and install.
Longest damage path and duration: The Tri-State Tornado. The longest recorded tornado journey in U.S. history was the Tri-State Tornado of 1925, which traveled almost 220 miles across southeastern Missouri, southern Illinois, and southwestern Indiana during its 3.5-hour life. The average tornado travels about 5 miles.
2011âs deadly tornado in Joplin, Missouri â just one of many to strike the American Midwest that weekend â is a stark reminder of that fact. In total, more than 1,000 tornadoes touched down in the U.S. in April 2011 â the most active month on record.