Thanks for the additional information, Willy!
Construction-sized trash pumps can move an immense amount of water. However, at some point the battle becomes too great and you have just settle for what the ground conditions will allow.
Luke,
Does your contractor's sump hole quickly draw down when he turns his pump on in the morning, or does he run it all day and barely pulls down the water level? That kind of sets the parameters for his "battle" against the groundwater.
