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.
An aerial view of the destruction of West Frankfort, Illinois, in March 1925. Photograph: Bettmann/Corbis T errible as it was, the monstrous tornado that tore through Moore, Oklahoma, on Monday, razing whole neighbourhoods, destroying a primary school and killing at least 24 people, was not the deadliest twister the US has experienced.