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.
View Caption. The tornado that ripped through El Reno, Okla. , on Friday was the widest tornado ever recorded and had winds that hit nearly 300 miles per hour, close to the highest wind speed ever measured, the National Weather Service reported Tuesday.