We have a semi detached house that has a shared drain (under the ground) with our next door neighbour. The set up is unusual in that we have all the land at the back of our house (which is a courtyard) which continues behind her house (she overlooks it). She has no outside area at the back and no access into it from her house - although she can of course come through our side gate.
Now she is rather old and quite concerned about this drain! Even though it is under the ground she likes to go into our back area and sweep the top of it - the concrete - of any stones that might have strayed onto it - she does this most days!
We have been here 2 years and been relatively tolerant of this (including not minding her scaring the pants of me when I see her peeping into the study from the back!) But now I have placed a small plastic type greenhouse there - against our wall and on top of the buried drain! It is the only place available for it unless I place it in the middle of the courtyard!
So now she is coming around each day and moving it off the concrete!
What to do? For some reason she feels that the concrete needs to be kept clear incase the drain blocks???? Like we couldn't move anything that was on it and wouldn't use rods through the access points first?
Any thoughts on how to cope with her rather strange reasoning??!!