I'm sure this has been mentioned before but Dutton canal tunnel at Preston Brook** is one of the oldest working tunnels in the world.
** for others, Preston Brook is near where Ebiker lives.
If the weather has been dry for a while then I have a lovely ride that goes to that tunnel and then over the top on the old horse path
There is another tunnel further on and if I keep going that way I get to the Canal lift that raises and lowers boats from the Trent&Mersey canal to the River Weaver
(they have a cafe as well)
but that is "being repaired" at the moment and has been for a while!
Apparently they are currently inspecting the Preston Brook tunnel to check it is all OK
the canal when I join it is the Bridgewater canal - the second oldest in the country
it is owned by Peel Holding and not the Canal and River Trust
it changes to the Trent&Mersey Canal at the start of the Preston Brook tunnel
but the "stop lock" (a lock with gates and all that but only a VERY small change in water level - but loss of water from one does not affect the other) is a short distance AFTER the tunnel
BTW - teh Bridgewater canal is built differently in a very important way
The slope of the canal bank in places where it is higher than the surrounding land - is much steeper than for later canals - I think it is 25 degrees and newer ones (i.e. most of them) are 33 degrees
which makes the banks less able to resist breaches than other canals
I read stuff!!
and I sometimes remember it correctly!!!
Now put you paper away neatly and line up by the door ready to leave
Oh sorry - went back to teach mode for a while there