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.
No tornado in US history has killed more people in a single town (234 in Murphysboro, Illinois), or in a single school: 33 at De Soto, Illinois (17 more children died at Longfellow School, Murphysboro; in all, the Tri-State Tornado killed 69 children in nine schools).