13th June 2006, 03:48 PM
I had almost the exact opposite experience when I was a Project Officer. I was running a an evaluation on a fairly large rural site. The driver got more and more stoned as the day went on. He only managed about 5 trenches per day, and they got gradually more banana shaped as he went. It was awful - especially when I had to explain it to the County Archaeologist. We ended up having to hire another machine to cope with how slow he was.