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Banro Files NI 43-101 Technical Report on Namoya Project, Democratic Republic of the Congo

TORONTO, ONTARIO -- (Marketwired) -- 05/13/14 -- Banro Corporation ("Banro" or the "Company") (NYSE MKT:BAA)(TSX:BAA) announces that it has filed on SEDAR a National Instrument 43-101 ("NI 43-101") technical report in respect of the Company's Namoya gold mine, which follows the mineral resource estimate for Namoya previously announced by the Company. This technical report (the "Technical Report"), which was prepared by Venmyn Deloitte, has an effective date of December 31, 2013 and is entitled "Independent National Instrument 43-101 Technical Report on the Namoya Gold Project, Maniema Province, Democratic Republic of the Congo". The work carried out and reported in the Technical Report is at a Feasibility Study level, as per the requirements of NI 43-101. The following information is derived from the Technical Report.

Overview

Namoya is an open pit mine that is currently in the development and ramp up stage. Construction began in the first quarter of 2012. The process plant makes use of a hybrid heap leach design in which a heap leach operation works in conjunction with a gravity gold recovery operation and a Carbon-in-Leach (CIL) plant.

Highlights


--  The proposed mining operation will consist of four opencast pits that
    will mine oxide, transitional and fresh rock materials, which will be
    processed using a heap leach pad and CIL Processing Plant. 
--  The Life-of-Mine (LoM) Plan has been based on an initial processing
    plant capacity of 2Mtpa with the plant capacity increasing to 2.6Mtpa
    from the third year of operation. The mining schedule reflects a review
    of a number of scheduling options with the focus on mining relatively
    lower cost pits in the initial years of mining, providing an optimal
    mining sequence. This ensures that mining commence in pushbacks with
    high cashflow in the early years of mining. The LoM schedule covers a
    period of 10 years, with average mined tonnages of 14.9Mtpa over the
    Life of Mine and strip ratio of 4.07. 
--  Processing (fully described in the Technical Report) consists of primary
    crushing, secondary and tertiary crushing, gravity recovery (for
    material under 2mm), heap leaching (material greater than 2mm), carbon-
    in-solution, carbon-in-leach (material under 150 micron), acid wash,
    elution, electrowinning and gold room drying processes leading to the
    pouring of dore. 

The LoM schedule (Table 1) covers a period of 10 years, with average mined tonnages of 14.9 Mtpa over the life of mine, and strip ratio of 4.07. Low grade ore is planned to be stockpiled during the active mining period and processed when required to meet the plant throughput requirements during the active mining operational periods, or after mining operations if it is economically viable at the time.

A cut-off grade strategy is used in the LoM schedule, such that reserve cut-off grade defines the ore/waste segregation. A mining cut-off is used to provide preferential treatment to high grade plant feed. Material between the reserve cut-off and mining cut-off is planned to be stockpiled as low grade ore. In determining mining cut-off grades, the reserve cut-off grade is planned to be increased iteratively until the full mining capacity is reached, while meeting plant processing capacity. This process ensures ore of relatively lower grades are filtered out as low grade ore and the higher grades are sent for processing as required.

Table 1 - Life of Mine Production Profile

To view Table 1, please visit the following link: http://media3.marketwire.com/docs/945397_T1_may13.pdf

Estimated Namoya Mine capital and operational expenditures are summarized in Tables 2 and 3 respectively.


Table 2 - Summary CapEx for the Namoya Project                              
----------------------------------------------------------------------------
CAPITAL EXPENDITURE                                 YEAR      YEAR      YEAR
                                     TOTAL LOM         1         2         3
----------------------------------------------------------------------------
Ongoing Capex                 (USDm)   (43.93)    (4.20)    (5.41)    (5.27)
----------------------------------------------------------------------------
New Capital                   (USDm)   (17.63)    (5.79)    (4.32)    (6.56)
----------------------------------------------------------------------------
Sustaining Capital (Pad                                                     
 Expansions, Tailings Dam                                                   
 Lifts)                       (USDm)    (6.87)    (0.54)    (0.58)    (0.75)
----------------------------------------------------------------------------
Total                         (USDm)   (68.43)   (10.54)   (10.32)   (12.59)
----------------------------------------------------------------------------
Average Capex per Oz           (USD)   (60.93)                              
----------------------------------------------------------------------------
                                                                            
Table 3 - Summary of OpEx for the Namoya Project                            
----------------------------------------------------------------------------
OPERATING EXPENDITURE                               YEAR      YEAR      YEAR
                                     TOTAL LOM         1         2         3
----------------------------------------------------------------------------
Mining Costs                  (USDm)  (440.64)   (25.38)   (70.22)   (57.02)
----------------------------------------------------------------------------
Processing Costs              (USDm)  (253.25)   (28.21)   (22.76)   (29.59)
----------------------------------------------------------------------------
General and Administration    (USDm)  (148.66)   (26.39)   (11.20)   (14.57)
----------------------------------------------------------------------------
Sales                         (USDm)   (36.06)    (4.08)    (4.05)    (4.25)
----------------------------------------------------------------------------
Total                         (USDm)  (878.60)  (138.65)  (142.21)  (149.59)
----------------------------------------------------------------------------
Average Opex per Oz            (USD)  (782.29)  (669.14)  (856.08)  (794.84)
----------------------------------------------------------------------------

Economic Analysis

The economic analysis of the Namoya Mine was undertaken by Venmyn Deloitte utilizing the Market Approach and Discounted Cash Flow (DCF) methodologies in review of management's analysis. The economic analysis was based on the results of the studies completed by the contributing specialist consultants with the aim of determining the validity of management's estimated value of the Namoya Project. The valuation model under review was sourced from Namoya Mining's management.

To this end, Venmyn Deloitte assessed assumptions and technical parameters used by management and prepared a DCF model accordingly. The economic and technical input parameters used in the DCF models are summarized in Table 4 and Table 5, respectively. The Capex and Opex for the mining and processing are summarized in Table 6 and Table 7 respectively.


Table 4 - Economic input parameters for the Namoya Project Economic Analysis
----------------------------------------------------------------------------
Description                                     Year        Year        Year
                         Unit   Constant           1           2           3
----------------------------------------------------------------------------
Tax Rate                    %                                               
----------------------------------------------------------------------------
Discount Rate               %         10                                    
----------------------------------------------------------------------------
Gold Price(i)          USD/Oz          -       1,200       1,200       1,200
----------------------------------------------------------------------------
Processing Limit(i)    Tonnes          -   1,878,057   2,000,000   2,600,000
----------------------------------------------------------------------------
(i) Constant at last given amount                                           
Source: Namoya Management                                                   
                                                                            
Table 5 - Technical input parameters for the Namoya Project Economic        
 Analysis                                                                   
----------------------------------------------------------------------------
DESCRIPTION                             UNIT                           TOTAL
----------------------------------------------------------------------------
             MINING                                                         
----------------------------------------------------------------------------
High Grade ROM                        Tonnes                      19,254,476
----------------------------------------------------------------------------
Grade Mined                              g/t                            1.97
----------------------------------------------------------------------------
Low Grade ROM                         Tonnes                       4,217,022
----------------------------------------------------------------------------
Grade Mined                              g/t                            0.73
----------------------------------------------------------------------------
Total Ore Mined                       Tonnes                      23,471,498
----------------------------------------------------------------------------
Grade Mined                              g/t                            1.74
----------------------------------------------------------------------------
Waste Mined                           Tonnes                      95,485,394
----------------------------------------------------------------------------
Total Material Mined                  Tonnes                     118,956,892
----------------------------------------------------------------------------
Strip Ratio                              t/t                            4.07
----------------------------------------------------------------------------
           PROCESSING                                                       
----------------------------------------------------------------------------
Plant Feed                            Tonnes                      23,702,477
----------------------------------------------------------------------------
Head Grade                               g/t                            1.75
----------------------------------------------------------------------------
Recovery                                   %                             84%
----------------------------------------------------------------------------
Recovered Gold                            Oz                       1,123,019
----------------------------------------------------------------------------
                                                                            
Table 6 - Capital expenditure for Mining & Processing                       
----------------------------------------------------------------------------
CAPITAL EXPENDITURE                                 Year      Year      Year
                                           LOM         1         2         3
----------------------------------------------------------------------------
Ongoing Capex                 (USDm)   (43.93)    (4.20)    (5.41)    (5.27)
----------------------------------------------------------------------------
New Capital                   (USDm)   (17.63)    (5.79)    (4.32)    (6.56)
----------------------------------------------------------------------------
Sustaining Capital (Pad                                                     
 Expansions, Tailings Dam                                                   
 Lifts)                       (USDm)    (6.87)    (0.54)    (0.58)    (0.75)
----------------------------------------------------------------------------
Total                         (USDm)   (68.43)   (10.54)   (10.32)   (12.59)
----------------------------------------------------------------------------
Average Capex per Oz           (USD)   (60.93)                              
----------------------------------------------------------------------------
Source: Namoya Mining 2013                                                  
                                                                            
Table 7 - Operating expenditure for Mining & Processing                     
----------------------------------------------------------------------------
Description                                     Year    Year    Year    Year
                                        Unit       1       2       3       4
----------------------------------------------------------------------------
           MINING COSTS                                                     
----------------------------------------------------------------------------
Ore mining                         USD/Tonne    4.06    4.06    3.45    3.45
----------------------------------------------------------------------------
Waste mining                       USD/Tonne    3.72    3.72    3.16    3.16
----------------------------------------------------------------------------
Grade Control                      USD/Tonne    0.24    0.13    0.13    0.13
----------------------------------------------------------------------------
Rehab mining waste dumps           USD/Tonne     0.3     0.3     0.3     0.3
----------------------------------------------------------------------------
         PROCESSING COSTS                                                   
----------------------------------------------------------------------------
Plant                              USD/Tonne    6.82    3.99    3.99    3.99
----------------------------------------------------------------------------
Power                              USD/Tonne    4.82    5.42    5.42    4.07
----------------------------------------------------------------------------
Engineering & Maintenance          USD/Tonne    3.01    1.61    1.61    1.61
----------------------------------------------------------------------------
Plant Assay                        USD/Tonne    0.36    0.36    0.36    0.36
----------------------------------------------------------------------------
    GENERAL AND ADMINISTRATION                                              
----------------------------------------------------------------------------
Infrastructure, Overheads and                                               
 Sundries                          USD/Tonne   14.05    5.60    5.60    5.60
----------------------------------------------------------------------------
               SALES                                                        
----------------------------------------------------------------------------
Refinery and Shipment              USD/Tonne    3.44    3.44    3.44    3.44
----------------------------------------------------------------------------
Government Royalty                 USD/Tonne   11.63   11.16   11.16   11.16
----------------------------------------------------------------------------
Management Fee (Toronto)           USD/Tonne    5.98    5.98    5.98    5.98
----------------------------------------------------------------------------
Management Fee (Banro Congo                                                 
 Mining)                           USD/Tonne   11.48   11.48   11.48   11.48
----------------------------------------------------------------------------
               Total                                                        
----------------------------------------------------------------------------
Average Opex per Oz                    (USD)(669.14)(856.08)(794.84)        
----------------------------------------------------------------------------
(i) Constant at last given amount                                           

The production schedule took into account that both higher grades and lower grades of ore will be mined and processed at different stages over the project lifetime. The feed to the processing plant will be determined by the processing limit where the higher grade ore will be processed first and any excess ore stockpiled. All of the higher grade ore is expected to be processed by year eight at which stage the lower grade stockpile will form part of the feed to the processing plant. By 2022 solely the lower grade ore will be processed and is expected to be finished by year ten. The total expected recovered gold over the project lifetime amounts to approximately 1,123,019 oz.

The economic analysis at a real 10% discount rate and at a constant gold price of US$1,200/oz resulted in a net present value of US$252 million.


Namoya Resources & Reserves Summary                                         
                                                                            
Table 8: Namoya Mineral Resources                                           
----------------------------------------------------------------------------
 Category                               Tonnes          Grade           Gold
                                          (Mt)       (g/t Au)          (Moz)
----------------------------------------------------------------------------
 Measured                                23.75           1.98           1.51
----------------------------------------------------------------------------
Indicated                                 6.03           1.62           0.31
----------------------------------------------------------------------------
Measured and Indicated                   29.78           1.91           1.83
----------------------------------------------------------------------------
Inferred                                  6.52           1.61           0.34
----------------------------------------------------------------------------
                                                                            
Table 9: Namoya Mineral Reserves                                            
                                                                            
----------------------------------------------------------------------------
 Category                               Tonnes          Grade           Gold
                                          (Mt)       (g/t Au)          (Moz)
----------------------------------------------------------------------------
Proven                                   22.39           1.78           1.28
----------------------------------------------------------------------------
Probable                                  1.31           1.34           0.06
----------------------------------------------------------------------------
Total Proven & Probable                  23.70           1.75           1.34
----------------------------------------------------------------------------
                                                                            
Note: Rounding of numbers may result in computational discrepancies.        
      Mineral Reserves included in Mineral Resources.                       

Qualified Person

Mr. Andrew Clay, Managing Director of Venmyn Deloitte (Pty) Ltd., was the "qualified person" (within the meaning of NI 43-101) for the purpose of the Technical Report. Mr. Clay has reviewed and approved the contents of this press release.

Banro Corporation is a Canadian gold mining company focused on production from the Twangiza mine, which began commercial production September 1, 2012, and completion of its second gold mine at Namoya located approximately 200 kilometres southwest of the Twangiza gold mine. The Company's longer term objectives include the development of two additional major, wholly-owned gold projects, Lugushwa and Kamituga. The four projects, each of which has a mining license, are located along the 210 kilometre long Twangiza-Namoya gold belt in the South Kivu and Maniema provinces of the Democratic Republic of the Congo. Led by a proven management team with extensive gold and African experience, the initial focus of the Company is on the mining of oxide material, which has a low capital intensity to develop but also attracts a lower technical and financial risk to the Company. All business activities are followed in a socially and environmentally responsible manner.

Cautionary Note to U.S. Investors

The United States Securities and Exchange Commission (the "SEC") permits U.S. mining companies, in their filings with the SEC, to disclose only those mineral deposits that a company can economically and legally extract or produce. Certain terms are used by the Company, such as "Measured", "Indicated", and "Inferred" "Resources", that the SEC guidelines strictly prohibit U.S. registered companies from including in their filings with the SEC. U.S. Investors are urged to consider closely the disclosure in the Company's Form 40-F Registration Statement, File No. 001-32399, which may be secured from the Company, or from the SEC's website at http://www.sec.gov/edgar.shtml.

Cautionary Note Concerning Mineral Resource and Mineral Reserve Estimates

The Company's Mineral Resource and Mineral Reserve figures are estimates and no assurances can be given that the indicated levels of gold will be produced. Such estimates are expressions of judgment based on knowledge, mining experience, analysis of drilling results and industry practices. Valid estimates made at a given time may significantly change when new information becomes available. While the Company believes that its Mineral Resource and Mineral Reserve estimates are well established, by their nature Mineral Resource and Mineral Reserve estimates are imprecise and depend, to a certain extent, upon statistical inferences which may ultimately prove unreliable.

Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. There is no certainty that Mineral Resources can be upgraded to Mineral Reserves through continued exploration.

Due to the uncertainty that may be attached to Inferred Mineral Resources, it cannot be assumed that all or any part of an Inferred Mineral Resource will be upgraded to an Indicated or Measured Mineral Resource as a result of continued exploration. Confidence in the estimate is insufficient to allow meaningful application of the technical and economic parameters to enable an evaluation of economic viability worthy of public disclosure (except in certain limited circumstances). Inferred Mineral Resources are excluded from estimates forming the basis of a feasibility study.

Cautionary Note Concerning Forward-Looking Statements

This press release contains forward-looking statements. All statements, other than statements of historical fact, that address activities, events or developments that the Company believes, expects or anticipates will or may occur in the future (including, without limitation, statements regarding net present values and future cash flows, Mineral Resource and Mineral Reserve estimates, potential Mineral Resources and Mineral Reserves and future gold production and costs) are forward-looking statements. These forward-looking statements reflect the current expectations or beliefs of the Company based on information currently available to the Company. Forward-looking statements are subject to a number of risks and uncertainties that may cause the actual results of the Company to differ materially from those discussed in the forward-looking statements, and even if such actual results are realized or substantially realized, there can be no assurance that they will have the expected consequences to, or effects on the Company. Factors that could cause actual results or events to differ materially from current expectations include, among other things: uncertainty of estimates of capital and operating costs, production estimates and estimated economic return of the Company's projects; the possibility that actual circumstances will differ from the estimates and assumptions used in the economic analysis of the Company's Namoya project; failure to establish estimated mineral resources and mineral reserves (the Company's mineral resource and mineral reserve figures are estimates and no assurance can be given that the intended levels of gold will be produced); fluctuations in gold prices and currency exchange rates; inflation; gold recoveries being less than those indicated by the metallurgical testwork carried out to date (there can be no assurance that gold recoveries in small scale laboratory tests will be duplicated in large tests under on-site conditions or during production) or less than those expected following the expansion of the Twangiza plant; uncertainties relating to the availability and costs of financing needed in the future;

changes in equity markets; political developments in the DRC; lack of infrastructure; failure to procure or maintain, or delays in procuring or maintaining, permits and approvals; lack of availability at a reasonable cost or at all, of plants, equipment or labour; inability to attract and retain key management and personnel; changes to regulations affecting the Company's activities; the uncertainties involved in interpreting drilling results and other geological data; and the other risks disclosed under the heading "Risk Factors" and elsewhere in the Company's annual information form dated March 29, 2014 filed on SEDAR at www.sedar.com and EDGAR at www.sec.gov. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Although the Company believes that the assumptions inherent in the forward-looking statements are reasonable, forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to the inherent uncertainty therein.

For further information, please visit our website at www.banro.com.

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