I N V E N T O R Y S T U D Y O N D E V E L O P M E N T P O T E N T I A L F O R R U R A L E L E C T R I F I C A T I O N I N I N D O N E S I A

SA’DAN TUA S u l a w e s i S e l a t a n

Bandung, August 28, 2001 Inventory Study on Development Potential For Rural electrification in 1 S I T E R E P O R T

Sa'dan Tua - Balopasange

N 1. GENERAL INFORMATION

SA'DAN TUA Province : Sulawesi Selatan Regency : TanaToraja District : Sa'dan Balusu MAKALE Village : Balopasange Site / Sub-village : Sa'dan Tua PARE River : Kobura PARE WATAMPONE Gross Head : 12 m Estimate Design Discharge : 500 l/s Hydraulic Potential Power : 58.86 kW SULAWESI ISLAND Estimate Electrical Power : 30.93 kW

2. SITE DESCRIPTION 2.1. Location services route among Rantepao Sa'dan Sa'dan Tua sub-village is one of the potential Balusu - Balopasange. From Balopasange site for a Micro Hydropower (MHP) (Sa'dan Tua), the MHP scheme (power house implementation. Sa'dan Tua sub-village is part of location) could be reached by walk in6 30 Balopasange village, Sa'dan Balusu district, Tana minutes (for more detail, see Table 1.) Toraja regency, Sulawesi Selatan province. It is located geographically at S 020 50'25.6” and 2.3. Topographic and Geological Condition E1190 55'9.2”. Balopasange village north border is The MHP scheme will uses water from regency, Ulu Salu village at the southern Kobura river. The river located on the north of side, Pasondongan village at the western side Sa'dan Tua sub-village. From the MHP sche - and Sangkoropi village at the eastern side. me (power house location) the river goes to Table 1. Route of Access Line

Route Distance Duration Available Layer (road) Transportation Type

Rantepao - Sa'dan Balusu12 km 30 minutes Bus, rented car Asphalt Sa'dan Balusu - Balopasange (Sa'dan Tua)13 km 45 minutes Bus, rented car Asphalt Balopasange (Sa'dan Tua) - MHP scheme location 600 m 30 minutes - Soil

2.2. Accessibility the south-east direction. Topographic Sa'dan Tua sub-village located about 25 km to conditions along the river are moderate the north of Rantepao, , slope, and the materials around the river are Sulawesi Selatan Province. The location could be gravel and loose soil. There are rice fields reach by four wheel vehicle such Kijang or area (a hilly lands) along the head race motorcycle in about 2 hours from Rantepao, or by (channel) route. Detail topographic map could a public transportation (buses, rented car) which be seen in Annex 3. Inventory Study on Development Potential For Rural electrification in INDONESIA 2 S I T E R E P O R T

3. SOCIO - ECONOMIC CONDITION Village settlement in Balopasange village are agricultural potential in the area, Balopasa- spread, not concentrated. There is an adequate nge villages are quite prospective to develop distance between every small group from one to further. There are existing public facilities another. Almost the villagers are farmers. Their such as elementary school, church, public main crops are coffee, and chocolate. They still health center, and village government office. cultivate their land in traditional way, without any There are also community organizations such modern agriculture know-how. According to the as LKMD, LMD, and religious groups.

4. POTENTIAL ENERGY SOURCES AND ELECTRIFICATION CONDITION

The villages around the MHP scheme has not been electrified and will not get electricity from PLN grid, at least in the recent PLN Plan. The nearest PLN electricity grid is about 13 km. Existing main energy sources for villagers there are kerosene, and oil for lighting. The village around MHP scheme economically have many potential, especially in agriculture, horticulture, and forestry sectors. However, related production facilities are still insufficient, there are some possibilities such as: rice mill and coffee grinding. MHP development is expected giving valuable support to increase community economics quality apart from lighting need. As shown at Table 2, the number of households that will electrified by MHP scheme at Balopasa- nge villages are6 162 households. Based on empiric data of electrification project using MHP, the estimate electricity need or electrical power need assumption is about 150 watt per house. Including the electricity need for several public Figure 1 facilities, then total MHP Capacity expected for Tongkonan house (Village Settlement) at Sa'dan Tua Balopasange villages is about 25.52 kW. sub-village, Balopasange, TanaToraja.

Table 2. Sub-Villages which will electrified by The MHP Scheme

Sub-Village Village Number of Latitude Line Longitude Line Household

Sa'dan Tua 1 Balopasange 40 S 0200 50'27” E 119 55'24” Sa'dan Tua 2 Balopasange 20 S 0200 50'37.8” E 119 55'12” Borong Balopasange 30 S 0200 50'2.1” E 119 55'7.2” Ba'ba Saratu Balopasange 10 S 0200 50'55.8” E 119 55'22.2” Belonga Balopasange 22 S 0200 50'42.6” E 119 55'38.2” Karongian Balopasange 40 S 0200 50'53.5” E 119 56'7.7” Total 162 Inventory Study on Development Potential For Rural electrification in INDONESIA 3 S I T E R E P O R T

Table 3. Estimate Energy Demand in The Catchment Area

Item Amount Capacity per Unit Capacity Remark

Households 162 150 W 24.3 kW - School 1 100 W 0.1 kW Elementary School, Church 3 100 W 0.3 kW Public Health Center 1 100 W 0.1 kW - Village Office 1 100 W 0.1 kW Meeting Facility Public Facility (Street Lighting) - 0.74 kW Total 25.52 kW

5. HYDRO-POWER POTENTIAL

According to topographic measurement, water -pasange village and the surrounding is from Kobura River will be flowed through intake about 25.52 kW. To fulfil this requirement, the then to headrace which the length is about 146 m MHP scheme discharge have to be about (see detailed site plan at Annex 4). For this MHP 500 l/s with the estimate net head 11.5 m, scheme, measured gross head is about 12 m and with this calculation the MHP scheme could estimated penstock length is about 45 m. Detail generate electricity power about 30.93 kW penstock profile is shown at Annex 5. and still have reserved power about 5.41 kW Estimate minimum power electricity need in Balo (see detail calculation at Table 4.).

Actual discharge measured of Kobura River is 61111 liter/second. Recorded discharge data or annual discharge are not available and discharge measurement done not in the driest month, therefore maximum discharge in the dry season estimated about 500 l/s.

However, design discharge has to be determined in detail and more accurate, considering all factors and catchment area when a further feasibility study for this MHP done.

6. TRANSMISSION LINE

The village settlement surrounding the MHP scheme is spread and in small groups which have significant distance from each other. Main transmission line to those sub-villages, Figure 2 as shown in Table 2, is about 4.45 km length. The selected location for penstock route; by the forestry area The transmission line design of Balopasange in the part of Sa'dan Tua sub-village. village is shown in Annex 6. Inventory Study on Development Potential For Rural electrification in INDONESIA 4 S I T E R E P O R T

Table 4. Estimate Power Capacity of The MHP Scheme

I t e m Symbol Amount

Estimate Gross Head Hg 12 m

Measured Discharge ( when surveyed) Qm 1111 l/s

Design Discharge (max 60% from Qm ) Qd 500 l/s

Hydraulic Power Potential Ph 58.86 kW

Estimate Net Head Hnet 11.5 m h Estimate TurbineEfficiency T 0.7 h Estimate Generator Efficiency G 0.85 h Estimate mechanical transmission efficiency M 0.97

Estimate Electrical Power Generated at the power house Pel1 32.56 kW

Estimate transmission Losses Ploss 1.63 kW

Estimate Electrical Power delivered to the village Pel2 30.93 kW

Expected MHP Capacity (refers to table 3) Pexp 25.52 kW

Reserved Power (Pel2 - Pexp ) Pres 5.41 kW I. DEMOGRAPHIC & SOCIAL

Item / Description Amount / Remarks Site / Sub-village Sa'dan Tua River Kobura Village Balopasange District Sa'dan Balusu Regency Tana Toraja Province Sulawesi Selatan Distance to PLN Grid 13 km Number of Population 866 Number of Households 162 Means of Livelihood Farming Economic Potential (Local Commodity) Coffee, Chocolate

II. HYDRAULICAL CONDITION

Item / Description Amount / Remarks Gross Head 12 m Estimate Design Discharge 500 l/s Hydraulic Potential Power 58.86 kW Estimate Electrical Power 30.93 kW

III. C I V I L

Item / Description Amount / Remarks Estimation of Weir & Intake Type of Weir Gabion Material Stone Masonry Width (of Weir) 15 m Type of Intake Side Intake Material Stone Masonry

Estimation of Headrace (Channel) Type Open Channel Material Stone Masonry Length 146 m

Estimation of Head Tank (Forebay) Material Concrete, Stone Masonry

Estimation of Penstock Length 45 m Diameter 57 cm Material Welded (Rolled) Steel

Estimation of Power House Material Brick Masonry IV. ELECTRO-MECHANICAL

Item / Description Amount / Remarks Estimation of Turbine Type Crossflow Estimate Turbine Efficiency 0.7

Estimation of Mechanical Transmission Type Flat Belt Estimate Mechanical Transmission Efficiency 0.97

Estimation of Generator Type Synchronous Estimate Generator Efficiency 0.85

Estimation of Control System Type Electronic Load Controller Ballast Load Air Heater

V. TRANSMISSION LINE

Item / Description Amount / Remarks Estimation of Transmission Line Length 4.45 km Photograph 1 Nature of stream bed at Kobura river; The selected location for Dam and Intake scheme, Sa'dan Tua sub village, Balopasange

Photograph 2 Part of the hilly area at Sa'dan Tua sub-village; The selected location for Head Tank(forebay) scheme, Photograph 3 The selected location for headrace (channel) scheme; a rice fields area of Sa'dan Tua sub-village.

Photograph 4 Backgrounds are the settlements of Sa'dan Tua sub-village; Where the transmission (electricity) line will distribute.