There are two water wheels at the mill. The working wheel is at the north end of the mill and this can be operated for school parties.
The south wheel is made of iron and is smaller than the north wheel. The north water wheel is made of elm and cast iron. When water is let out through the bottom of the sluice gate, it fills the buckets on the wheel and the weight of the water turns it around backwards. This type of wheel is called an overshot wheel, as the water comes out of the sluice above the middle of the wheel. It is sometimes called a backshot wheel as it turns backwards.