In 2008, heavy rains caused a 20-foot steel-wall road repair in California to fail; in 2009 crews rebuilt the slope using 330,000 waste tyres and saved $300,000
Sonoma Mountain road failure and TDA placement in progress. A California road repair project took an unusual turn after heavy rains caused a previous reconstruction to fail. Instead of using another traditional retaining-wall system, engineers filled the damaged section with hundreds of thousands of discarded vehicle tires. According to CalRecycle, the official website of the…