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The Mitheithel River flows south from the Ettenmoor and meets the Loudwater River to form the Hoarwell. It crosses the Great East Road at Last Bridge well to the west of the Ford of Bruinen on the Loudwater, which is near Rivendale. This ford on the Loudwater was a scene in the first movie when the Elven princess saved Frodo and carried him to Rivendale. She called up a water elemental there to defeat the Nazgul that were chasing her.