Yonki Dam

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Yonki Dam
Yonki Dam.JPG
Yonki Dam viewed from Highlands Highway
Yonki Dam is located in Papua New Guinea
Yonki Dam
Location of Yonki Dam
Location Papua New Guinea
Coordinates 6°15′05″S 145°58′49″E / 6.25139°S 145.98028°E / -6.25139; 145.98028Coordinates: 6°15′05″S 145°58′49″E / 6.25139°S 145.98028°E / -6.25139; 145.98028
Construction began 1986
Opening date 1991
Construction cost US$140 million
Dam and spillways
Type of dam Embankment
Height 60 m (200 ft)
Dam volume 1,900,000 m3 (67,000,000 cu ft)
Creates Yonki Reservoir
Total capacity 335,000,000 m3 (1.18×1010 cu ft)
Power station
Operator(s) PNG Power
Commission date 1991
Turbines 5 (Ramu 1) plus 2 under construction (Yonki Toe of Dam)
Installed capacity 77 MW (103,000 hp) (Ramu 1) plus 18 MW (24,000 hp) under construction

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

Yonki Dam is located in the Eastern Highlands Province of Papua New Guinea.

The Highlands Highway passes over the Yonki Dam embankment. The adjacent Yonki villages support the operation of the dam and power station.[1]

Ramu 1[edit]

Ramu 1 Power Station is a 77-megawatt (103,000 hp) hydro electric power station located at the Ramu River in Eastern Highlands Province, Papua New Guinea.

The power station consists of five units. Units 1, 2 and 3 are rated at 15 megawatts (20,000 hp), and units 4 and 5 are rated at 17 megawatts (23,000 hp). The power station is owned and operated by PNG Power.


  1. ^ "Yonki Hydroelectric Project" (PDF). Japan International Cooperation Agency. Retrieved 24 September 2010.