Riam Kanan

The description on Riam Kanan Hydro Electric Project in Kalimantan (Indonesia).
Location : South Kalimantan, Indonesia
Nearest City: Banjarbaru and Martapura (25 km West)
River : Riam Kanan, a tributary of Barito
Purpose : Hydoelectric Power generation,
flood control and irrigation water supply
Period of Construction:
1962-1964 - Feasibility study, Engineering design
1964-1966 - Site development including Access road to site
1966-1973 - Main works (Dam, Waterways, Power
plant,Transmission lines and Substations)

Reservoir :
Catchment Area : 1,043 km2
Gross storage capacity : 1,200 Million m3
Effecxtive storage capacity: 600 Million m3
Reservoir area : 92 km2
Highest water level : EL 60.00 m
Lowest water level : EL 52.00 m
Flood water level : EL 63.00
Dam :
Type : Earthfill
Height : 57 m
Volume : 670,000 m3
Crest elevation : EL 66.00
Crest length : 195 m
Spillway :
a. Service Spillway
Type : Morning glory
Discharge capacity : 500 m3/sec
Tunnel diameter : 6.00 m
Tunnel length : 210 m
b. Emergency Spillway
Type : Open channel
Discharge capacity : 250 m3/sec
Headrace Tunnel :
Length : 270 m
Diameter : 4.80 m
Generation plant :
Turbine type : Francis, vertical shaft
Generator type : Semi umbrella
Capacity, first stage : 2 x 10,000 kW
Capacity, final stage : 3 x 10,000 kW
Gross head maximum : 49.5 m
Gross head minimum : 41.5 m
Rated head : 39.8 m
Discharge, first stage : 58 m3/sec
Discharge, final stage : 87 m3/sec
Switchyard

70 kV Transmission Line :
Circuit, first stage : Single
Circuit, final stage : Double
Conductor : ACSR 120 mm2
Length : 52 km
Total steel tower : 152 tower
70 kV Cempaka Substation :
Type : Outdoor, conventional
Transformer capacity : 1 x 3,000 kVA first stage
Transformer capacity : 1 x 6,000 kVA final stage
70 kV Banjarmasin Substation :
Type : Outdoor, conventional
Transformer capacity : 2 x 6,000 kVA first stage
Transformer capacity : 1 x 6,000 kVA final stage

Owner : PT PLN (Persero)
State Electricity Corporation
Engineering Consultant : Nippon Koei Co. Ltd (Japan)
Construction by :
Main works (Dam, Power House and site facilities: by Force account, supervized by Hazama Gumi (Japan)
Metal works (Gates, penstock, surge tank): Nippon Kokkan (Japan)
Generating Equipment: Fuji Electric (Japan), Toyomenka (Japan)
Transmission line and Substations: PT Wijaya Karya (Indonesia)