A good post Brietta. It is not beyond the bounds of possibility that a child could fall into an open trench bringing fill material in on top of him or her as they fell. Workmen could very easily miss a child in such a situation.
Similarly, a child falling down an open culvert as a result of a displaced manhole cover could end up just about anywhere in the underground system and unless it is all checked properly using cctv then that child might not be discovered.
I don't believe the sewer and rainwater overflow systems were all checked in Praia da Luz after Madeleine disappeared, can anyone verify this?
There
was an open manhole that evening.
I would further like to say that in connection with the disappearance of Madeleine, I saw a manhole with a cover removed.
This manhole is situated on a junction of a road that runs parallel to the supermarket near to the Tapas Bar and the McCanns apartment. The cover along with the surround that been removed and placed to the side of the road.
The road is lit by street lighting but I believe you would not have seen the hole and anyone could have fallen in.
I returned the next day and noticed that the cover had been replaced. I am concerned that she may have fallen down the manhole and was not seen.http://www.mccannpjfiles.co.uk/PJ/REX-MORGAN.htmIf it was a cavity with a bottom and a hole in the side for just passing cables, then she couldn't have passed through. However, if it was a deeper one for sewage or rainwater passing into some kind of evacuation system, then I would have thought it possible, but then presumably the body would have washed up somewhere or created a noticeable blockage at some point.
I haven't found anything about a thorough verification of sewerage / rainfall evacuation at the time.
From what I can gather, there must be lots of former farmhouses which would presumably still have septic tanks and wells in the area.
The GNR and other rescue services were looking for a child who was still alive or who may have died accidentally (i.e., not murdered with concealment of a body). I presume that a manhole lid or a protection on a well that would have been too heavy for a child to lift would not have attracted much attention at that stage. One that had been open, but replaced the next morning may be a different issue.
Harrison did suggest searching the crèche area and open land to the east of PdL with enhanced methods, but this does not seem to have taken place.