A grist mill converts grains such as wheat or corn into flour and animal feed. Built in 1846, the Bale Mill in St Helena is one of the oldest structures in Napa County. This marvel of ingenuity still works; you can watch it in action on the weekends.
Tours are offered at 10:30 am, 11:30 am, 1 pm, 2 pm, and 3 pm. We got there a little late, but it was no problem to join a tour midway and then stay a bit longer to catch up on what we missed.
Our guide was very knowledgeable as he presented the history of the mill and its owners. Then he turned on the waterwheel. He set it at the slowest setting so he could demonstrate it and yet still be heard once we moved inside. The mechanics for the mill are efficient. It can be operated with just two people. Cup elevators transport the grain through the system. The pinnacle of the demonstration is to watch the flour come out of the grindstone. There is also a hands-on element where you can grind corn by hand.
You can buy various flours at the historic granary gift shop. These are marked ‘Not for human consumption’, as the mill operators opted for a personal demonstration area that doesn’t meet the high hygienic standards.
The Bale Grist Mill State Historic Park is located at 3315 St Helena. Parking fee is $10 and the entrance fee for adults is $8, children 6-17 pay $3, and children under 6 are free. The mill is open Saturdays and Sundays from 10 am to 4 pm.