Summary (by AI): I was fascinated by the Caen Hill lock system on the Kennet and Avon Canal, finding it a fabulous and impressive piece of engineering with a rich history.
Blog: In the world we live in today, I guess we take the silly little things for granted—like the simple ability to drive up a hill. But in the 18th century, before such modern conveniences were invented, you were a bit stuck when it came to hills, especially if you were navigating a canal.
The Kennet and Avon Canal runs from the River Kennet all the way through to the Avon, cutting across the Wiltshire Downs. There’s one particular stretch where the levels change by about 72 meters. To solve this back in the early 1800s, they built the Caen Hill lock system, and it is truly a wonder of engineering.
The middle section alone consists of 16 locks that rise those 72 meters over a span of two miles—a gradient of about 1 in 44. To manage the massive amount of water that flows up and down as boats pass through, they designed special "side pounds." These are large ponds that sit next to the locks to balance the water levels, which was especially vital when the canal was at its busiest.
I actually bumped into a couple on my way through who were working their boat down the flight. They mentioned that going down wasn’t too bad because the individual locks were already full. However, on their way up, they had a much tougher time; they had to wait and fill every single lock before they could proceed. I suppose that makes sense—if someone had just come down before you, all the locks would be empty. I guess, when there’s a lot of traffic going back and forth, the system eventually balances itself out.
It makes for a lovely walk, though the day I visited was incredibly hot. It was the middle of April, yet it hit 25 degrees—one of the hottest days of the year so far. I was out on a ride and decided to stop by, and I’m so glad I did. It’s fascinating to imagine this place in its heyday. You would have seen a constant flow of agricultural produce and dairy from Wiltshire and Somerset heading toward London, alongside heavy loads of coal from the Somerset coalfields, Bath stone for building, and even military transport.
Before the locks were completed, the Kennet and Avon was essentially split in two. You’d get to the bottom of the hill, unload your entire boat, and load everything onto horse-drawn carriages to be dragged up the slope. Goods, passengers, everything—only to be loaded onto a completely different boat at the top to continue the journey. You can imagine how disruptive and exhausting that was for the people running those businesses.
Even though it’s a fabulous piece of engineering, the canal actually fell into a state of dispute and disrepair for many years. It’s strange how that happens. Today, we have a much better understanding of how important it is to keep these historical artifacts alive, but for a while, it was just allowed to decay. It makes you wonder what people in the 60s and 70s thought of it before it was eventually re-engineered and restored.
Perhaps it’s a symptom of the fact that we have more time to appreciate these things now—or maybe we just realized what we were about to lose. Either way, I’m glad they restored it. It looks absolutely fabulous.
The Map: