X0101 EFFECT 33 LIVE 2006-10-20

S-3

0001324518 Williams Partners L.P. 333-137562 0001374711 Williams Partners Finance Corp 333-137562-04 0001374710 Williams Partners Operating LLC 333-137562-03 0001374717 Mid-Continent Fractionation & Storage, LLC 333-137562-02 0001374714 Carbonate Trend Pipeline LLC 333-137562-01