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The range runs into the Saruwaged Range to the east and together they form a natural barrier between the Ramu and Markham valleys to the south and Vitiaz Strait to the north.
The Saruwaged Range runs into the Finisterre Range to the west and together they form a natural barrier between the Ramu and Markham valleys to the south and Vitiaz Strait to the north.
Sepik–Ramu would consist of a hundred languages of the Sepik and Ramu river basins of northern Papua New Guinea, but spoken by only 200 000 people in all.
Yonki Dam is an earth-fill embankment dam over the Ramu River that supports the Ramu 1 hydroelectric power plant and the (under construction) Yonki Toe of Dam power plant