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Indonesia
Wahana Rimba Lestari (WRL) Project

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 Location:
18 km NW from Talang Gudang, Indonesia

  Project Contacts:
Plaza Permata Lt.11 Suite 1104, JL. M.H Thamrin, Kec. Menteng, RT.9/RW.5
Gondangdia
Indonesia
10350
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WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePre-Feasibility
Mine TypeOpen Pit
Commodities
  • Coal (thermal)
Mining Method
  • Truck & Shovel / Loader
Mine Life20 years (as of Jan 1, 2021)


Owners

Source: p. 330-331
CompanyInterestOwnership
Golden Energy and Resources Ltd. (GEAR) 62.5 % Indirect
Tenure at the WRL concession is held by PT WRL under the Izin Usaha Pertambangan Operation and Production (IUPOP) license covering a total area of 4,739 ha.

GEAR has 66.9998% ownership of WRL indirectly.

Contractors

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Deposit Type

  • Sedimentary


Summary:

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 to12 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 ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Based on the observations made on the characteristic of the WRL coal deposit in the previous section, it is assumed that an "open-cut, multi seams and low degree dips with a standard truck and excavator in a haul back operational system" will be most appropriate and selected for WRL coal project. This method is well proven and has become a common mining practice in Indonesia. Initial box-cut will be developed by mining the waste material using relatively small to medium-sized (100t operating weight) hydraulic excavators, loaded onto standard rear tipping off-highway trucks then hauled to ex-pit dumps in close proximity to the pits. After sufficient mined out space created, the mined waste will be subsequently dumped in-pit using haul back methodology and the ex-pit dump area is then rehabilitated. Coal mining will be undertaken by small-sized (34-40t) excavators with flat-bladed buckets to ensure the minimum dilution and greater mining recovery. Given the shallow nature of the deposit, the underground mining method is not considered for the purpose of this study, hence the term "Opn Cut" Coal Reserve Statement. The contractor is proposed to be used for carrying out the mining operations over the life of mine. Overall batter slope angles used in the design are less than 30° and individual bench slopes up to 40°. Bench heights of 10 m and berm widths of 5 m but can also be varied to coincide with maximizing coal seam recovery and maintaining safe overall batter slope angle. ........


Crushing and Grinding


Processing


Summary:

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.


Projected Production:

CommodityUnitsAvg. Annual
Coal (thermal) Mt 3
All production numbers are expressed as ROM coal.


Reserves at December 31, 2021:

CategoryTonnage Commodity
Proven 33.8 Mt Coal (thermal)
Probable 53.4 Mt Coal (thermal)
Proven & Probable 87.2 Mt Coal (thermal)
Measured 55 Mt Coal (thermal)
Indicated 100 Mt Coal (thermal)
Inferred 161 Mt Coal (thermal)
Total Resource 316 Mt Coal (thermal)

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Coal (thermal) USD  ......  Subscription required&nbs
Total cash costs Coal (thermal) USD  ......  Subscription required&nbs
Assumed price Coal (thermal) USD  ......  Subscription required&nbs
* According to 2021 study / presentation.
Subscription required - Subscription is required.

2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Total CapEx $M USD  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of December 31, 2021:
HME TypeModelSizeQuantityLeased or
Contractor
Compactor ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
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....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

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


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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