Northgate Minerals Releases Final Feasibility Study for the Young-Davidson
Project
12.4% Pre-Tax Internal Rate of Return at
Highlights of the Feasibility Study
The Feasibility Study incorporates the proven and probable gold reserve of
2.8 million ounces that was announced in July 2009(1). Highlights of the
Feasibility Study presented below are based on a gold price of $825 per ounce
and an exchange rate of US$/Cdn$0.90:
- Average annual production of 180,000 ounces of gold at a net cash
cost of $351 per ounce.
- After the first two years of open pit production, average annual
production for the remaining mine life will increase to 190,000
ounces of gold at a net cash cost of $341 per ounce.
- 15-year mine-life at a mill throughput of 6,000 tonnes per day
("tpd").
- Initial capital cost of $339 million.
- Sustaining capital costs of $236 million during the life of the mine.
- Pre-tax operating cash flow of $646 million, net present value
("NPV") 5% of $264 million, with an Internal Rate of Return ("IRR")
of 12.4%.
- Targeting production in 2012.
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Technical Report filed on SEDAR (www.sedar.com) on August 27, 2009.
Young-Davidson Feasibility Study Results
The Feasibility Study is based on the same 2.8 million ounces of proven and probable gold reserves announced on
Operating costs have been developed from first principles and are based on staffing levels, consumables and expenditures required to support the mine and its associated processing, maintenance and administrative activities. Unit operating costs are projected to be Cdn$31.63 per metric tonne ("mt") of ore, which are approximately the same as they were in the Pre-Feasibility Study, although the confidence of the cost projection has increased significantly. The net cash cost per ounce of gold in US dollars has increased slightly from the Pre-Feasibility study stage, but solely as a result of the change in base case exchange rate assumption from US$/Cdn$0.85 to US$/Cdn$0.90.
Engineering investigations during the Feasibility phase of the project focused on design and development of the surface and underground facilities, including the shafts and hoisting facility, the tailings storage facility, the processing plant and the upgraded 47 kilometre ("km") transmission line connection to the Hydro One grid. This work resulted in a modest increase in initial capital cost of the project compared with the Pre-Feasibility Study. Underground production was advanced by taking advantage of the existing mine infrastructure to more quickly develop the new production shaft and improved sequencing of tonnes from the open pit.
The pre-production capital cost estimate is
The Young-Davidson Project is expected to generate
Table 1: Project Economics Estimate
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Operating NPV 5%
Gold Cash Flow (US$M) Discount (US$M) IRR
Price ------------------------------------------------------ Payback
US$/oz After After After (years)
Pre-tax tax Pre-tax tax Pre-tax tax
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825 $646 $466 $264 $166 12.4% 10.3% 6.9
925 $887 $631 $418 $275 16.3% 13.6% 5.9
1025 $1,131 $799 $573 $383 19.9% 16.6% 5.1
1125 $1,379 $969 $729 $492 23.3% 19.5% 4.5
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* Base case in bold.
Table 2: Summary of Economic Parameters
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Item Value
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Gold price (US$ per ounce) 825
Silver price (US$ per ounce) 12.50
Foreign exchange rates (US$/Cdn$) 0.90
Tax rates (%)
Federal Income Tax 15
Provincial Income Tax 10
Provincial Mining Tax 10
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Pre-Production Capital (US$ millions)
Infrastructure 75.0
Process plant 81.1
Mining 95.7
Indirect costs 56.5
Contingency 31.1
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Total Pre-Production Capital $339.4
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Sustaining Capital & Mine Closure (US$ millions)
Completion of Underground Mine Infrastructure 128.6
Sustaining Capital & Mine Closure 107.8
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Total Sustaining Capital & Mine Closure $236.4
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Average mining cost (Cdn$ per tonne milled) 19.03(1)
Process cost (Cdn$ per tonne milled) 10.08
General and administration (Cdn$ per tonne milled) 2.52
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Total (Cdn$ per tonne milled) $31.63
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Processing Recovery (%)
Gold 92.4
Silver 70.7
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(1) Includes open pit mining cost of Cdn$3.46 per tonne mined and
underground mining cost of Cdn$20.63 per tonne mined.
Project Update
During the fourth quarter of 2009, shaft dewatering activities and ramp development resumed at site in order to continue advanced exploration and establish the underground access conditions necessary for the modified construction concept for the new production shaft. Rather than blind sinking a new production shaft from surface, it was decided to deepen the existing Matachewan Consolidated Mine ("MCM") shaft from 775 metres ("m") to 1,515m and raise a new main production shaft in two sections from the bottom of the known reserve at 1,515m. This construction method will advance the underground development schedule and significantly increase the certainty of completing the underground development according to the Feasibility Study schedule.
A wide variety of other activities have also commenced in preparation for
a final development decision:
- Purchase orders totalling $6.75 million for underground equipment,
for use in the ramp development, has been issued and the equipment is
scheduled for delivery in the first quarter of 2010.
- Bid proposals for the shaft development have been received and are
currently being evaluated in order to support an award by Northgate
shortly.
- Discussions are underway for an EPCM contract for the project.
- Several permit applications have been submitted to regulators and
preparation of others is well advanced.
- Hydro One is scheduled to complete the Environmental Assessment
process in February 2010 for upgrading the 47 km of the 115 kilovolts
(kV) transmission line from Kirkland Lake to Matachewan Junction.
- The hiring process of key members of Young-Davidson's project team
has been initiated.
- Northgate has received indicative terms for project financing from a
wide variety of major banks who are interested to provide financing
for the project.
Infrastructure
The Young-Davidson property is located 3 km west of the town of Matachewan, in the gold-producing Abitibi greenstone belt of northern Ontario. It is readily accessible to, and serviced by, surrounding mining communities such as Kirkland Lake (60 km) and Timmins (165 km) via Highways 566, 66 and 101.
Electric power for the mine site will be supplied by upgrading approximately 47 km of an existing 115 kV power line and installing 7 km of a new 115 kV line and a mine site transformer station.
The mining operations will consist of an open pit and underground mine. Access to the underground mine will be via the ramp, deepening the existing MCM shaft and the development of a new production shaft. Surface facilities will consist of a modern 6,000 tpd process plant utilizing conventional gold processing technology. Additional surface facilities to support the Young-Davidson mine will include an administration/engineering building, a warehouse and a maintenance shop. The tailings impoundment facility location has been selected to incorporate and remediate an historic tailings site.
The Young-Davidson property sits on the site of two past producing mines, both with track records of successful mining and simple metallurgy, producing approximately one million ounces of gold between the mid 1930's and the mid 1950's. All of the existing underground workings left by the previous owners are in excellent condition. The photos below show the head frame and hoist room building as well as entrance to the ramp providing access underground.
To view image click here:
http://www.northgateminerals.com/Theme/Northgate/files/Releases/YD_Fig_1.gif
Environment, Permitting and Community Relations
Environmental and permitting activities are ongoing and open houses will continue to be held with the local communities and First Nations, where there is strong community support for the Young-Davidson project. Northgate has also been working cooperatively with the Matachewan First Nation and on
Mineral Reserves and Resources
The open pit and underground mineral reserves have not changed since the release of the Pre-Feasibility Study and assume a gold price of US$725 per ounce and an exchange rate of US$/Cdn$0.85. Proven and probable reserves total 2.8 million ounces of gold and are detailed in the following table:
Table 3: Open Pit and Underground Mineral Reserve
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Gold Silver
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Tonnes Grade Grade
Zone Category (000) (g/t) Ounces (g/t) Ounces
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Open Pit(1) Probable 4,939 1.66 264,000
Underground(2) Proven 3,469 3.22 359,000 0.58 65,000
Probable 22,740 2.92 2,135,000 0.97 708,000
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Total Proven and
Probable Reserve 31,148 2.75 2,758,000 0.77 773,000
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(1) The open pit gold cut-off considers ore-based operating costs of US
$12.11/tonne (processing, G&A), a gold recovery of 91%, a US
$0.68/tonne stockpile rehandle cost and royalty costs as appropriate
within the claim boundaries. A 0.62 gram per tonne ("g/t") cut-off
was applied within royalty free claims, 0.68 g/t cut-off and 0.69 g/t
cut-off applied to claims subject to royalty agreements.
(2) A 1.7 g/t gold cut-off grade was applied to the underground resource
model for the sublevel cave and longhole shrinkage mining methods
based on 15% dilution, mining costs of Cdn$21.74, process costs of
Cdn$11.40 and G&A costs of Cdn$2.75 and a gold recovery of 92.5%. A
2.3 g/t gold cut-off grade was applied to the longhole retreat mining
method to account for the additional capital development and lower
productivity of this mining method. No cut-off grade was applied for
silver.
The Feasibility Study confirms that the project provides strong returns in the current economic environment. The present reserve base is an excellent starting point and will likely be expanded by upgrading the mineral resources into the reserve category through additional work. Current project economics do not factor in the 6 million tonnes of inferred and 132,000 tonnes of indicated resources as outlined the in the Table 4. The mineral resources are based on a gold price of
Table 4: Open Pit and Underground Mineral Resource Estimate
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Gold Silver
Gold -------------------------------------
Cut-off Tonnes Grade Grade
Zone Category (g/t) (000) (g/t) Ounces (g/t) Ounces
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Under-
ground(2) Indicated 2.30 132 3.08 13,100 3.09 13,100
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Gold Silver
Gold -------------------------------------
Cut-off Tonnes Grade Grade
Zone Category (g/t) (000) (g/t) Ounces (g/t) Ounces
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Open Pit(1) Inferred 0.60 15 1.74 850
Under-
ground(2) Inferred 2.30 5,950 3.40 650,000 1.13 216,000
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Total
Inferred 5,965 3.40 650,850 1.13 216,000
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(1) Open pit mineralized wireframes constructed based on approximately
0.60 g/t gold cut-off grade and a minimum true thickness of 5m.
(2) Underground mineralized wireframes were constructed based on
approximately 1.70 g/t gold cut-off grade and 1.3 g/t gold
incremental cut-off grade and minimum true thickness of 3m. No cut-
off grade was applied for silver.
In 2010, Northgate will focus its exploration efforts on geological settings known to host gold mineralization elsewhere on the property, which would have the potential to add to reserves and provide ore to the mill during the early years of production. Part of this exploration will focus on the mafic volcanic rocks from which there has been historic gold production at a higher grade and where the Company recently reported near surface gold discoveries, including hole YD09-120, which intersected 7.6 g/t gold over 13.5m.
Northgate will also be targeting what is believed to be the fault offset of the main Young-Davidson gold deposit, which is in close proximity to the planned infrastructure.
Qualified Persons
Northgate Minerals Corporation is a gold and copper producer with mining operations, development projects and exploration properties in
Cautionary Note Regarding Forward-Looking Statements and Information:
This Northgate press release contains "forward-looking information", as such term is defined in applicable Canadian securities legislation and "forward-looking statements" within the meaning of the
Cautionary Note to US Investors Regarding Mineral Reporting Standards:
The Company prepares its disclosure in accordance with the requirements of securities laws in effect in
%CIK: 0000072931
For further information: Ms. Keren R. Yun, Director, Investor Relations, Tel: (416) 363-1701 ext. 233, Email: [email protected], Website: www.northgateminerals.com
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