Anyone walking the GU towpath between Calcutt and, say, Leamington. Will come across a number of examples of this:
Generally found two or three feet back from the water's edge these bits of sheet piling crop up quite often on this stretch of canal. You have to suppose one of two things to explain it.
a) The canal used to be wider and this is where the old edge was, or
b) These were driven in to secure the inland edge of the tie rods you sometimes see keeping the newer piling from leaning into the water.
I've seen plenty of the tie rods along there but never anchored to one of these old bits of piling, so maybe the canal really was in fact if I recall rightly some of these old bits of piling are where there isn't any new piling at the water's edge.
So maybe the canal really was two or three feet wider. Strange though as this stretch of canal is still quite wide today.
Can anyone enlighten us?