R A T T E S u l a w e s i S e l a t a n

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1 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 R A T T E S u l a w e s i S e l a t a n Bandung, August 20, 2001

2 Inventry Study n Develpment Ptential Fr Rural electrificatin in INDONESIA 1 S I T E R E P O R T PARE PARE MAKASSAR RATTE MAKALE WATAMPONE N SULAWESI ISLAND R a t t e - R i n d i n g A l l 1. GENERAL INFORMATION Prvince : Sulawesi Selatan Regency : Tana Traja District : Rinding All Village : Baruppu Selatan Site / Sub-village : Ratte River : Tamang Grss Head : 15.4 m Estimate Design Discharge : 575 l/s Hydraulic Ptential Pwer : 86.8 kw Estimate Electrical Pwer : 43.9 kw 2. SITE DESCRIPTION 2.1. Lcatin Ratte sub village is ne f the ptential site fr a Micr Hydrpwer (MHP) implementatin. Ratte sub-village is part f Baruppu Selatan village, Rinding All district, Tana Traja regency, Sulawesi Selatan prvince. It is lcated gegraphically at S '7.8 and E '22.4. Baruppu Selatan village nrth brder is Baruppu Tengah village, Pangala village at the suthern side, a cnservated frest at the western side and Bulu Manik hill at the eastern side. the MHP scheme lcatin (pwer huse) culd be reached by walk in 645 minutes (see Table 1) Tpgraphic and Gelgical Cnditin The MHP scheme will uses water frm Tamang river. The river lcated n the nrthwest f Ratte sub-village. Frm the MHP scheme lcatin (pwer huse) the river ges t the east directin. Tpgraphic cnditins alng the river are mderate slpe. A rice Table 1. Rute f Access Line Rute Distance Duratin Available Layer (rad) Transprtatin Type Rantepa - Rinding All 30 km 2.5 hurs Bus, rented car Asphalt, Gravel Rinding All - Baruppu Selatan (Ratte) 12 km 1 hurs Bus, rented car Gravel Baruppu Selatan (Ratte) - MHP scheme lcatin 1.5 km 45 minutes - Gravel, Sil 2.2. Accessibility Ratte sub-village lcated abut 42 km t the nrthwest f Rantepa, Tana Traja regency, Sulawesi Selatan prvince. The lcatin culd be reach by fur wheel vehicle such Kijang r mtrcycle in abut 4 hurs frm Rantepa, r by a public transprtatin (buses, rented car) which services rute amng : Rantepa - Rinding All - Baruppu Selatan. Frm Baruppu Selatan (Ratte),fields area are surrunds the headrace rute, while a stny hill lays in a certain part. There are several landslide traces which ccurred in the aqueduct lcatin. Detail tpgraphic map culd be seen at Annex 3.

3 Inventry Study n Develpment Ptential Fr Rural electrificatin in INDONESIA 2 S I T E R E P O R T 3. SOCIO - ECONOMIC CONDITION Village settlement in Baruppu Selatan and Baruppu Tengah villages are spread, nt cncentrated. There is an adequate distance between every small grup frm ne t anther. Almst the villagers are farmers. Their main crps are cffee, avcad, and passin fruit. Several villagers are wrk in the city. They still cultivate their land in a traditinal way, withut any mdern agriculture knw-hw. Accrding t the agriculture ptential in the area, Baruppu Selatan and Baruppu Tengah are quite prspective t develp further. There are existing public facilities such as elementary schl, junir high schl, church, public health center, and village gvernment ffice. There are als cmmunity rganizati-ns such as LKMD, Farmer grups, and religius grups. Figure 1 Landscapes f Barereng sub-village; Backgrunds are Elementary schl and Junir high schl building. 4. POTENTIAL ENERGY SOURCES AND ELECTRIFICATION CONDITION The villages arund the MHP scheme has nt been electrified and will nt get electricity frm PLN grid, at least until The nearest PLN electricity grid is abut 8 km. Existing main energy surces fr villagers are kersene, and il fr lighting. Baruppu Selatan villages have used simple micr hydr technlgy such as lcally designed hydrpwer t generate electricity. The numbers f that simple micr hydr in the village are three units (unfrtunately, villagers at Baruppu Selatan still use traditinal il lamp fr lighting, since a 'crucial mess' which caused by the inequality distributin f thse hydr pwer plants). The village arund MHP scheme lcatin ecnmically have many ptential, especially in agriculture, and frestry sectrs. Hwever, related prductin facilities are still insufficient, there are sme pssibilities such as: sawmill, and cffee grinding. MHP develpment is expected giving valuable supprt t increase cmmunity ecnmics quality apart frm lighting need. As shwn at Table 2, the number f huse hlds that will electrified by MHP scheme at Baruppu Selatan and Baruppu Tengah villages are 365 husehlds. Based n empiric Table 2. Sub-Villages which will electrified by The MHP Scheme Sub-Village Village Number f Latitude Line Lngitude Line Husehld Ratte Baruppu Selatan 48 S 02 51'16.8 E '32.7 Barereng Baruppu Selatan 58 S 02 51'15.2 E '43.7 Kalasip Baruppu Selatan 47 S 02 51'22.2 E119 46'46.8 Karngian Baruppu Selatan 58 S 02 51'41.4 E '44.1 Tiran Baruppu Selatan 45 S 02 51'46.8 E '30.4 Sisali Baruppu Tengah 48 S 02 50'46.6 E '35.9 Kambisa Baruppu Tengah 61 S 02 50'57.5 E '30.4 Ttal 365 6

4 Inventry Study n Develpment Ptential Fr Rural electrificatin in INDONESIA 3 S I T E R E P O R T Table 3. Estimate Energy Demand in The Catchment Area Item Amunt Capacity per Unit Capacity Remark Husehlds W 36.5 kw - Schl W 0.2 kw Elementary Schl, Junir High Schl Church W 0.6 kw Public Health Center W 0.1 kw - Village Office W 0.1 kw Meeting Facility Public Facility (Street Lighting) kw Ttal kw data f electrificatin prject using MHP, the estimate electricity need r electrical pwer need assumptin is abut 100 watt per huse. Including the electricity need fr several public fa - cilities, then ttal MHP Capacity expected fr Baruppu Selatan and Baruppu Tengah villages is abut kw. 5. HYDRO-POWER POTENTIAL Accrding t tpgraphic measurement, water frm Tamang River will be flwed thrugh intake then t headrace which the length is abut 293 m (see detailed site plan in Annex 4). Fr this MHP scheme, measured grss head is abut 15.4 m and estimated penstck length is abut 43 m. Detail penstck prfile is shwn in Annex 5. Estimated minimum pwer electricity need in Baruppu Selatan and Baruppu Tengah village and the surrunding area is abut kw. T fulfil this requirement, the MHP discharge have t be abut 575 l/s with the estimate net head 15 m, with this calculatin, the MHP scheme culd generate electricity pwer abut 43.9 kw and still have reserved pwer abut 5.46 kw (see detail calculatin at Table 4.). Actual discharge measured f Tamang River is 6960 liter/secnd. Recrded discharge data r annual discharge are nt available and discharge measurement dne nt in the driest mnth, therefre maximum discharge in the dry seasn estimated abut 575 l/s. Hwever, design discharge has t be determined in detail and mre accurate, cnsidering all factr including the Figure 2 Nature f Streambed f Tamang river, Ratte; The selected lcatin fr Dam and Intake f MHP scheme annual fld which ccurred nce in a year, (accrding t the investigatin), and catch - ment area when a further feasibility study fr this MHP dne.

5 Inventry Study n Develpment Ptential Fr Rural electrificatin in INDONESIA 4 S I T E R E P O R T I t e m Symbl Amunt Estimate Grss Head Hg 15.4 m Measured Discharge ( when surveyed) Qm 960 l/s Design Discharge (max 60% frm Q m) Qd 575 l/s Hydraulic Pwer Ptential Ph 86.8 kw Estimate Net Head Hnet 15 m Estimate Turbine Efficiency Estimate Generatr Efficiency Estimate mechanical transmissin efficiency ht hg hm Estimate Electrical Pwer Generated at the pwer huse Pel kw Estimate transmissin Lsses Plss 4.88 kw Estimate Electrical Pwer delivered t the village Pel kw Expected MHP Capacity (refers t table 3) Pexp kw Reserved Pwer (P - P ) P 5.46 kw el2 exp Table 4. Estimate Pwer Capacity f The MHP Scheme res 6. TRANSMISSION LINE The village settlement surrunding the MHP scheme is spread and in small grups which have a significant distance frm each ther. Main transmissin line t thse sub-villages, as shwn in Table 2, is abut 3.23 km length. Designed transmissin line f Baruppu Selatan and Ba - ruppu Tengah village culd be seen at Annex 6. The existing lcal hydrpwer plants culd still be utilized under sme certain cnditin and it is pssible als the existing lcal hydrpwer t be cnnected int MHP scheme in a village grid cnnectin system t fulfil electricity demand in Baruppu Selatan and Baruppu Tengah village in the future. Hwever, further feasibility study fr this intercnnectin is needed.

6 I. DEMOGRAPHIC & SOCIAL Item / Descriptin Site / Sub-village River Village District Regency Prvince Distance t PLN Grid Number f Ppulatin Number f Husehlds Means f Livelihd Ecnmic Ptential (Lcal Cmmdity) Amunt / Remarks Ratte Tamang Baruppu Selatan Rinding All Tana Traja Sulawesi Selatan 8 km Farming, Labr (at City) Cffee, Paddy II. HYDRAULICAL CONDITION Item / Descriptin Grss Head Estimate Design Discharge Hydraulic Ptential Pwer Estimate Electrical Pwer Amunt / Remarks 15.4 m 575 l/s 86.8 kw 43.9 kw III. C I V I L Item / Descriptin Estimatin f Weir & Intake Type f Weir Width (f Weir) Type f Intake Estimatin f Headrace (Channel) Type Length Estimatin f Head Tank (Frebay) Estimatin f Penstck Length Diameter Estimatin f Pwer Huse Amunt / Remarks Gabin Stne Masnry m Side Intake Stne Masnry Open Channel Stne Masnry 293 m Cncrete, Stne Masnry 43 m 38 cm Welded (Rlled) Steel Brick Masnry

7 IV. ELECTRO-MECHANICAL Item / Descriptin Estimatin f Turbine Type Estimate Turbine Efficiency Estimatin f Mechanical Transmissin Type Estimate Mechanical Transmissin Efficiency Estimatin f Generatr Type Estimate Generatr Efficiency Estimatin f Cntrl System Type Ballast Lad Amunt / Remarks Crssflw 0.7 Flat Belt 0.97 Synchrnus 0.85 Electrnic Lad Cntrller Air Heater V. TRANSMISSION LINE Item / Descriptin Estimatin f Transmissin Line Length Amunt / Remarks 3.23 km

8 Phtgraph 1 Nature f stream bed f Tamang River; The selected lcatin fr Dam and Intake scheme, Ratte Sub- village, Baruppu Selatan. Phtgraph 2 Rice fields area alng Tamang river; The selected lcatin fr the pwer huse scheme, Ratte sub-village, Baruppu Selatan

9 Phtgraph 3 A rice field area ver Tamang river; selected lcatin fr the penstck rute, Ratte sub-village. Phtgraph 4 The existed irrigatin (channel) facility; this will used as a headrace facility fr the MHP scheme.

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