Riam Kanan: Technical Data

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)

Aranio

Lokasi proyek PLTA Riam Kanan terletak di desa Arinawai, Kecamatan Karang Intan, Kabupatren Martapura. Perubahan nama menjadi Aranio tidak diketahui dengan pasti, mungkin penyesuaian dengan 'lidah' Jepang yang turut membangun sebagai Konsultan dan Kontraktor Utama.

Untuk menuju lokasi dari Banjarbaru, diperlukan waktu kl setengah sampai 1 jam untuk menempuh jarak 25 km. Setelah mengambil jalan lurus di Simpang Empat (kiri: ke Martapura, kanan: ke Cempaka), akan dilewati Markas Batalyon Raiders, kemudian Mandiangin salah satu tempat wisata. Sebelum memasuki lokasi Proyek, akan dilewati Pos Keamanan di Awangbangkal kemudian Quarry site Tambela, daerah perumahan karyawan (Asrama), barulah berbelok ke kiri menuju Kantor Proyek.

Kantor Proyek terdiri dari dua bangunan, sebelah kiri kantor Konsultan Nippon Koei dan sebelah kanan kantor Proyek PLTA Riam Kanan.

Jam kerja 08.00 - 16.00, dan antara 12.00-13.00 istrirahat.

Construction of Power Station

Construction of Pressure Tunnel

The last embankment of Main Dam

Construction of Coffer Dam

History of Riam Kanan Project

Nov 1958 -0 Jan 1959: Preliminary Survey
Jan 1961 - July 1962: Site Investigation
December 1962: Preparation of Design Report
Oct 1963 - March 1964: Construction of access road from Banjarbaru (length 25 km) and Project facilities
Apr 1966 - Oct 1968: Construction of Diversion tunnel (length 220 m, dia 6.00 m)
March 1969 - March 1972: Construction of Head race tunnel (length 270 m, concrete lining dia 4.80 m
July 18, 1969: Riam Kanan river flow diversed through Diversion tunnel with the construction of temporary Cofferdam
August - Oct 1969: Cleaned up the river bed and constructed the Cofferdam
January 1970: Foundation of Power statioin was started
1970: Construction of 70 kV Transmission line, 70 kV Cempaka and Banjarmasin Substations, 6 kV Sub-transmission line were started
July - Dec 1970: Construction of Main dam, first stage up to level EL 40.00
May - Oct 1971: Embankment of Main dam, final stage
Dec 1971: Construction of Gates, Penstocks and Turbine Generators were started simultaneously
June 30, 1972: Closing of Diversion tunnel to fill up the Reservoir. It needed six months to reach the minimal water level and started the Turbine Generators commisioning
March 1973: The net head EL 52.50 reached, Turbine generator No 1 and No 2 were tested in full load.
March 29, 1973: Trial operation of Riam Kanan system consist of Generation equipment, transmission lines and substations were successful, and electric energy flowed to Banjarbaru, Martapura and Banjarmasin cities.

Important Date

Oct 17, 1971: The final embankment of Main Dam by Minister of Public Works, Mr Ir Soetami
July 17, 1972: Beginning of Main Dam and Reservoir utilization were inaugurated by Minister of Public Works, Mr Ir Soetami
April 30, 1973: Inauguration of Riam Kanan Project by the President of Republic of Indonesia, Mr Soeharto