Graded Vs Cleared Abandoned Ski Slope (IMAGE) University of California - Davis Caption Land recovery after a ski slope is abandoned can be starkly different depending on how it was constructed. The graded run, left, was abandoned 13 years before with little sign of new vegetation. The cleared run, right, was abandoned 10 years before and plant life is abundant. Credit Andrew Burt/Jessica Hite Usage Restrictions Provide credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.