PT Inco PT Inco –– IndonesiaIndonesiaPT International Nickel Indonesia Tbk.

Production Services Dept.Production Services Dept.Cloud SeedingCloud Seeding

Prepared:Prepared:

27 October 201027 October 2010

PTI Location

Original Concession 6,600,000 HaCurrent Concession 218,529 Ha (3.3%)

Lake Towuti

Lake Matano

Lake Mahalona

Max. operating elevation of Lake Towuti is 319.60 Meters above sea level

Three Lakes area

Catchment AreaCatchment Area

TAIL RACE

LARONA RIVER

GALLERYTOP

BOTTOM GALLERY

SWITCH YARD AREA

TOWER

MATANO LAKE

MAHALONA LAKETOWUTI LAKE

SPILL WAY

BATU BESI DAM

PENSTOCK

PENSTOCKS

TURBINES

PETEA RIVERLAMPEA RIVER

LARONA RIVER

LARONA RIVER

POWER CANAL FOREBAY

OCB

PATINGKO RIVER

OCBSWITCH YARD AREA

UNITTRANSFORMER

TOWER

TOWER

TOWER

LARONA RIVER

LARONA RIVER

TRANSMISSION LINE

MAIN

150 KV A11/12

BALAMBANO DAM

TURBINES

150 KV A31/A32

PENSTOCKS

TOWER

TOWER

SCHEMATIC DIAGRAMLARONA AND BALAMBANO HYDRO

Hydroelectric Power Generation

system

Towuti

Batubesi

Canal GatesBatubesi Spillway

S1

LCanal Leakage

PatinckoRiver

Balambano

T2 Turbine Flow

BalambanoSpillway

S3

Canal InflowC

6.9 km Canal

1.3 km Penstocks

210m x 48m x 1.4m Forebay(313.1-314.5 m Elev)

100.8 m3/cm

3 x 65mw GeneratorsAvg discharge static head = 166.7m

2 x 68.5mw Generators

Head Pond(165.0-165.5 m Elev)(31.47-32.06 mcm)

11667 m3/cm

BKT Oct 14/99

P

UpperLarona

Balambano

sawah

ForebayOverflow

S2TurbineBypassB

Turbine FlowT1

Larona Tail Water= C+ S1 (flow matches generation)= S1+ L + S2 + B + T1 (flow/generation mismatch)

G

Balambano Tail Water= S3 + T2

PT INCOPT INCOHYDRO POWER SCHEMEHYDRO POWER SCHEME

SCHEMATIC DIAGRAMSCHEMATIC DIAGRAM

Hydro Plant DiagramHydro Plant Diagram

Process Plant

E.L E.L E.L

Wet Ore Stockpile

Batched by Ore Type

3 ea Dryer KilnsHSFO

Dry Ore Storage

East Type Crushed

West Type Rejected

5 ea Reduction KilnsHSFO, Coal

Dryer Kiln Product (DKP)

Calcine

Liquid Sulphur

4 ea 90MW Electric Furnaces

3 ea P.S Converters

Silica

F. Matte

Dust Recycle

SLAG Disposed14 ea Slag Pot Carriers

Fluid Bed DryerDiesel

Nickel

Matte Granulation

Packing3T Bags

Ship to Japan

Passive Cloud Seeding Passive Cloud Seeding PT International Nickel Indonesia Tbk.

Dynamic Cloud SeedingDynamic Cloud SeedingPT International Nickel Indonesia Tbk.

Flares Type

Hygroscopic : Underneath clouds4000 – 6000 Ft

Burn In Place :Inside clouds8000- 12000 Ft

Eject able :Top of clouds21000 – 23000 Ft

317.00

317.30

317.60

317.90

318.20

318.50

318.80

319.10

319.40

319.70

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

Actual 2010

Forecast

319.45 m

P70 : 318.75 m

P80 : 318.55 m

P90 : 318.30 m

2010 2011

Impacted Production

Generator Shutdown

Full Supply level

Yearly Forecast Lake Level

Historical Activity of Cloud Seeding

Passive & Dynamic Cloud Seeding by 

WMI

Passive Cloud Seeding by BPPT.  Minimal activity due to 

grounding of aircraft

Passive & Dynamic Cloud Seeding by WMI

Passive Cloud Seeding  by PTI

Passive & Dynamic Cloud 

Seeding by PTI (WMI Trained Pilot)

Passive & Dynamic Cloud 

Seeding by PTI

Rain FallAll RAIN FALL (AVERAGE)

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

mm

Dec 506 325 291 130 157 143 241 168 222 193 185 148 330 675 419 397 281 407 205 123 316 193 215 110 238 347 321 305 459 303 156 289 356 0

Nov 130 210 253 339 163 72 181 249 209 183 173 171 308 44 208 240 288 120 428 248 103 344 258 286 271 196 243 168 306 124 150 340 162 0

Oct 83 146 72 102 173 14 253 89 183 366 74 197 333 192 108 160 91 98 308 521 72 252 202 414 100 21 132 22 261 44 227 309 114 76

Sep 54 205 120 95 274 35 39 116 183 42 23 234 193 177 45 201 80 170 301 137 30 257 176 88 77 47 119 38 152 81 162 276 49 201

Aug 232 219 158 149 88 69 236 215 258 142 87 220 308 143 215 132 36 144 205 269 13 163 142 297 53 42 209 46 204 218 174 295 110 382

Jul 131 265 225 183 180 60 296 275 278 288 171 281 416 187 208 387 330 153 437 319 216 284 181 269 135 77 174 220 303 103 172 262 112 235

Jun 321 245 331 301 148 202 560 387 202 423 193 220 335 207 310 245 401 386 398 326 119 340 358 435 271 288 110 145 90 242 251 313 95 329

M ay 196 164 261 325 336 277 253 384 271 382 416 238 232 413 279 693 446 645 409 381 176 356 286 203 319 366 385 153 421 345 389 348 388 350

Apr 227 326 303 306 550 444 162 384 394 360 256 300 252 310 518 562 639 640 509 385 336 337 322 448 513 456 448 411 540 460 525 420 328 426

M ar 379 362 114 196 432 499 332 258 416 286 345 167 48 274 149 562 517 731 470 129 198 224 264 301 333 469 413 312 369 174 431 294 365 522

Feb 334 281 305 228 230 284 181 415 83 287 278 98 285 393 278 273 285 211 442 249 162 323 293 195 228 339 316 171 484 221 253 153 207 315

Jan 205 295 143 260 66 380 301 206 158 239 465 240 265 477 526 324 332 385 425 134 274 157 238 282 341 192 360 399 396 210 208 167 191 350

1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

R/Fall Catchment AreaTIMAMPU RAIN FALL

0

1000

2000

3000

4000

5000

6000

Dec 81.7 288.1 606.2 249 413.8 286 297.5 178 16.6 355.5 136.8 166.6 69.4 151.8 122.9 332.1 159.8 544.4 278.6 244.9 403.5 680

Nov 121.1 275.9 19.3 167.3 285.8 287.1 86.5 450.8 204.9 102.5 393.2 196.3 180.3 362 98.6 293.8 158.5 395.8 21.7 309.8 680.8 144.8

Oct 125.9 320.9 289.2 105.6 176.2 61.7 111.1 334.4 528.5 110.8 276.1 112.8 373.5 150 0 226.2 31.3 177.9 110.8 320.9 334.9 96.9

Sep 124.1 154.1 175.3 20.9 213.3 12 119.7 296.5 144.4 41 146.2 207.3 186.4 57.5 27.2 118.2 28.5 180.1 37.2 244.4 497.3 68.4 215.2

Aug 138.8 299.4 142.1 190 206.1 29.3 93.7 179.2 332.9 5.9 142.1 119.2 394.5 42.6 27 209.1 68.5 302 239.7 129.5 407.7 237.4 492.6

Jul 251.5 296.4 156.7 140.4 323.2 203.8 102.4 448.5 340.7 221.3 281.6 179.5 303.9 118.6 106.8 211.5 338.8 386 69.8 282 304.8 166.2 310.8

Jun 245.9 240 238.1 279.2 171.6 390.3 305.2 335.5 375.3 121.3 471.5 377.1 637.9 329.1 393.6 105.3 249.7 58.7 292.2 603.6 522.8 197.8 326.2

May 285.2 15.4 340.3 279.1 565 270.7 384.3 290.5 334.7 211.4 341.1 268 185.2 288.4 347.3 398.4 260 577.3 387.7 317.6 570 481.5 231

Apr 92.1 365.2 467.1 304.7 527.8 511.2 493.4 215.8 300 335.2 296.4 408.7 561.3 532.6 394.3 535.8 550.1 648.9 634.8 688.2 459.6 472

Mar 0 229.3 0 481.2 330.7 650.9 487.1 207.9 157.9 192.1 124.4 200.8 255.1 560.7 510.8 331.9 442.1 72.8 349.3 356 440.1 1114.6

Feb 89.2 225.4 221.9 223.8 208.8 151.8 333.6 282.4 177.8 222.5 202.5 131.7 173.4 250.9 363.3 248.4 524.2 224.8 304.6 219.6 209 356.5

Jan 43.9 355.6 538.7 286.8 292.2 251.7 427.9 169.7 193.7 118.6 249.6 285.4 306.7 117.4 273.7 448 493.9 224.7 310.4 110.6 248.6 288.9

1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Historical Lake Level