The tail race is where the water leaves the mill. If this is plugged it can seriously reduce your horsepower. It is sort of like a sink drain. If it is plugged … well, you get the idea. The tail race is around 200ft long. Twice I have taken a shovel and dug a small trench the length of the race. I thought it would washout and slowly get bigger. Didn’t happen. So, I dug a little deeper and found logs in the mud. I got a bid to find and remove the logs. It was around $15,000. So, I bought a backhoe for my tractor. The photo shows one of the logs. Some of the logs were heavier than my tractor. A farmer friend brought over a BIG tractor and pulled them out for me.