Wahana Rimba Lestari (WRL) Project

Click for more information



Mine TypeOpen Pit
  • Coal (thermal)
Mining Method
  • Truck & Shovel / Loader
Production Start... Lock
Mine Life... Lock
SnapshotThe Wahana Rimba Lestari (WRL) Project is designed as a source for supplying coal to domestic power plants. Mine is planned to be initially a 3Mtpa operations with 3 yrs ramp-up period. Mine is proposed to be expanded to 5.5 Mtpa operation from Year 8 onwards. Coal is proposed to be sold to the Power Plant on the ROM stockpile uncrushed.


Golden Energy and Resources Ltd. (GEAR) 7 % Indirect
As of August 21, 2023, Golden Energy and Resources's (GEAR) ownership of PT Golden Energy Mines Tbk (GEMS) is approximately 7.00%. GEMS holds 100% of Wahana Rimba Lestari (WRL).

GEAR has approximately 7% ownership of Wahana Rimba Lestari (WRL) asset indirectly.



- subscription is required.

Deposit type

  • Sedimentary


The local geology of the concession is comprised mainly of the late Miocene to Pliocene age Muara Enim Formation which is conformably overlain by the Kasai Formation to the south.

The Muara Enim Formation is the major coal-bearing formation within the South Sumatra region. The top and bottom of the Muara Enim Formation are defined by the upper and lower occurrence of laterally continuous coal beds. The formation itself is comprised of several stacked parasequences which vary from 0 m to 30 m in thickness, with shallow marine or bay clays at the base and shoreline and delta plain facies (sand, clay, coal) at the top. The Muara Enim Formation has been divided into 4 sub-formations (M-1 to M-4) and contains up to 12 different coal seams, which can reach a maximum total thickness of around 30- 35 metres.

The concession is located in an area of relatively simple geology with undulating coal seams with low dip angles and no major structural features recognized. The coal dips at less than 10 degrees.

WRL Coal Block lies in the Muara Enim formation coals and seams dip shallowly approximately 10 degrees to the north east. The coal quality is low rank with high inherent moisture and low ash and sulphur contents.

The deposit at WRL coal block contains 11 modelled coal seams of which 5 have been split into upper and lower plies. Some seams are less continuous than others and have been modelled to pinch out were not present in a particular drill hole. The Seam P14 seam is one of the most continuous seams contributing towards the coal resource and is present along the eastern part of the tenement. It sub crops in the middle of the tenement running from NW to SE throughout the deposit.

Within the WRL concession, Muara Enim Formation coals are classified as a low energy subbituminous class B coal.



- subscription is required.

Mining Methods


- subscription is required.


Crushers and Mills

Milling equipment has not been reported.



Coal will be sold from the stockpile area in an uncrushed form (as mined), hence no crushing facilities planned to be constructed for WRL project. The stockpiles will be the coal selling point where the ownership of the coal transfers from WRL to customer.

Weighbridges are planned to be installed at the entrance to ROM stockpiles to weigh coal trucks coming from the pit and at the exit point of the ROM area. These weighbridge readings will be reconciled and used as the basis for contractor payments calculation and for invoicing the customer.


All production numbers are expressed as ROM coal.

Operational metrics

ROM coal, LOM  ....  Subscribe
Raw coal annual capacity  ....  Subscribe
Stripping / waste ratio  ....  Subscribe
Waste tonnes, LOM  ....  Subscribe
* According to 2022 study.

Production Costs

Cash costs Coal (thermal) USD  ....  Subscribe
Total cash costs Coal (thermal) USD  ....  Subscribe
Operating margin Coal (thermal) USD  ....  Subscribe
Assumed price Coal (thermal) USD  ....  Subscribe
* According to 2022 study / presentation.

Project Costs

MetricsUnitsLOM Total
Sustaining CapEx $M USD  ......  Subscribe
Total CapEx $M USD  ......  Subscribe
Total OpEx $M USD  ......  Subscribe
Income Taxes $M USD  ......  Subscribe
Royalty payments $M USD  ......  Subscribe
Gross revenue (LOM) $M USD  ......  Subscribe
EBITDA (LOM) $M USD  ......  Subscribe
Net Income (LOM) $M USD  ......  Subscribe
After-tax Cash Flow (LOM) $M USD  ......  Subscribe

Heavy Mobile Equipment


- subscription is required.


Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2022


- subscription is required.