With all this talk of runway grooving, presumably to minimise the occasions that the runway surface is reported "wet" or worse, thereby avoiding the weight penalties with a restricted LDA/TORA, has it been established whether the runway is cambered? If not, and it either has a crosfall or is flat, grooving is not going to be as effective as intended. When SOU had their runway resurfaced they too went for the grooving option for the same reasons, problem was/is that they have a crosfall with a drainage gully on one side. This form of drainage has not been able to cope and water backs up in the grooves resulting invariably in the runway being reported "wet".