On A. Dry cold Saturday at the Alturas Lake Ski area, the Trail to the Lake as far as the junction, Over the Hill and South Loop got one new pass with the ginzu groomer, knocking down blown drifts and adding classic tracks. At that point grooming came to an abrupt stop with a rather loud kapow!!! We will return on Sunday to try to figure it out. We are hoping it is just a damaged drive belt.