Jossy said the area they are draining is at sea level and sea water keeps seeping in and this is what is slowing everything down.
"Jossy said the area they are draining is at sea level and sea water keeps seeping in and this is what is slowing everything down."
That is exactly the sort of thing that occurred to me. Water seeping in from the ground could make their job of pumping out all that water more time consuming.