ANNUAL INFORMATION FORM ENDEAVOUR MINING CORPORATION

Cumulative mining capacity of the fleet provided by AMS meets the earthmoving requirements
of the mining schedule as generated by Nzema technical management and properly supports
mining operations. The in-pit material excavation is largely conducted by two Liebherr 984C
back-hoe excavators equipped with 7m3 buckets (main production units). Waste and near-pit
ore haulage is mainly conducted by CAT 777 off-highway trucks; and material hauled out of
smaller satellite pits utilizes articulated Volvo A35F trucks.
The ore control strategy targeting delineation of ore and waste uses RC holes piercing multiple
benches. The geological and assay information, obtained by 18m holes, assayed every 1m,
represents an input to the grade control block model used by geologists and surveyors for final
ore/waste discrimination and in-pit mark-up.
Drilling and blasting is performed on 6 to 15m benches, depending on geological and
geotechnical settings of a given deposit, with blasted material excavated in discrete 3m high
flitches.
Production blasting is performed by MAXAM Ghana Ltd (MAXAM).
The explosives magazine on site consists of the ammonium nitrate mixing shed for the
manufacturing of bulk explosives, four 20 footer containers for storing detonators, high
explosives and other explosive accessories. The supply of detonators, boosters, bulk explosives,
initiating systems and other explosives material into the magazines for storage and further use
on the mine is the responsibility of MAXAM.
The waste rock dumps associated with mining operations are constructed to meet the
requirements of the Ghana Mining Regulations and the EPA. The condemnation drilling covered
the areas allocated for waste dumps and was completed during 2009 to 2010.
The current reserves supports another 7 years of mine life. The primary objective of the project
production schedule has been to maximize the early cash flow from the operation by delaying
the increased mining costs and bringing revenue forward as much as possible. This objective has
been achieved within the following constraints:
• Ensuring continuous ore supply to the processing plant for the selected 2 Mtpa
throughput rate
• Land access constraints
• Keeping the vertical mining advance rates generally below 9m (3 flitches) per month
(except at the start and end of the pit stages depending on the bench quantities)
• Maintaining a supply of approximately four weeks of mill feed in the ROM stockpile at a
reasonable grade
• Maintaining constant working strip ratios and consequently smooth mining rates for
extended periods of time as much as possible.
Table 1.5 below represents the key parameters of the current mining schedule.
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