Primero Reports First Quarter 2011 Results; Maintains 2011 Production Guidance

05/17/2011

TORONTO, ONTARIO--(Marketwire - May 17, 2011) - Primero Mining Corp. (TSX:P) -

(Please note that all dollar amounts in this news release are expressed in U.S. dollars, unless otherwise noted. Effective the first quarter of 2011, the Company prepares its financial statements in accordance with International Financial Reporting Standards ("IFRS"). The comparative financial information for 2010 as presented in the financial statements for first quarter 2011, and this news release, have been restated to conform with IFRS. Prior to the acquisition of the San Dimas mine on August 6, 2010, the Company did not have any producing mines and hence did not realize any revenue or earnings from mine operations. The discussion in this news release includes comparisons with the three months ended December 31, 2010, as results from the three months ended March 31, 2010 are not comparable.)

Primero Mining Corp. ("Primero" or the "Company") (TSX:P) today reported financial and operational results for the first quarter ended March 31, 2011. The Company produced a total of 24,100 gold equivalent ounces(1) at a total cash cost(2) of $624 per gold equivalent ounce. A first quarter net loss(3) amounted to $7.9 million ($0.09 per share), mainly as a result of the disproportionate tax associated with the silver purchase agreement.

"We are pleased to maintain our production guidance for 2011 despite the 31 day mill worker stoppage at San Dimas," stated Mr. Joseph F. Conway, President and Chief Executive Officer. "Our first quarter results show a continued improvement in daily throughput, which is key to our expansion plan to double production by 2013. Higher gold prices resulted in strong revenues but the dramatically higher silver prices impacted the bottom-line due to the adverse tax impact of the silver purchase agreements we inherited with the acquisition of the San Dimas mine. Management is committed to mitigating this tax imbalance. During the first quarter we purchased silver call options that provide protection for a six month period and today we announced that we have accelerated the tax depreciation of our mineral concessions. This has resulted in an approximately $380 million tax pool that will protect taxable income in Mexico for the next few years."

First Quarter 2011 Highlights:

--  Continued Strong Production - produced 24,100 gold equivalent ounces;
--  Focused on Costs - lowered total cash costs by $21 to $624 per gold
    equivalent ounce ($491 per gold ounce on a by-product basis);
--  Maintained Guidance - production in 2011 is estimated between 110,000
    and 120,000 gold equivalent ounces at cash costs of between $550 and
    $570 per gold equivalent ounce;
--  Implemented Tax Mitigation Strategies - purchased silver call options
    and tax pool available;
--  Broadening Shareholder Base - application made to list on the NYSE;
--  Improved Cash Position - increased cash position to $65.4 million at
    March 31, 2011;
--  Sinaloa Graben High-Grade Extension - 141 metres averaging 14 grams per
    tonne of gold.

Throughput Remains On-Track

Revenues in the first quarter of 2011 were $34.0 million compared to $41.4 million in the fourth quarter of 2010(4) mainly as a result of lower ounces sold. Total gold and silver ounces sold were lower in the first quarter than the fourth quarter 2010 as a result of the Company having sold 6,300 gold ounces in the fourth quarter that were produced in the third quarter of 2010. Production in the first quarter of 2011 was 24,100 gold equivalent ounces, consistent with the fourth quarter of 2010. First quarter total cash costs were reduced by 3% to $624 per gold equivalent ounce, or $491 per gold ounce on a by-product basis. The Company sold 20,500 ounces of gold at an average realized price of $1,387 per ounce and in accordance with the silver purchase agreement(5) 1.4 million ounces of silver at an average realized price of $4.04 per ounce.

First quarter cash provided by operating activities was $11.8 million (outflows of $1.5 million before changes in working capital), up from $11.5 million in the fourth quarter of 2010 (inflows of $14.0 million before changes in working capital).

The Company incurred a net loss of $7.9 million ($0.09 per share) in the first quarter 2011, compared with net income of $6.9 million in the fourth quarter 2010 ($0.08 per share). As a result of the transition to IFRS effective January 1, 2010, net income for the fourth quarter 2010 increased from $1.8 million ($0.02 per share) as reported under Canadian GAAP to $6.9 million mainly due to a gain on derivative contracts of $6.6 million, partly offset by an increase in accretion expense of $1.5 million. The adjusted net loss(6) for the first quarter totaled $7.7 million ($0.09 per share) compared to adjusted net earnings of $2.8 million ($0.03 per share) in the fourth quarter of 2010. The first quarter adjusted net loss does not exclude a non-cash stock-based compensation expense of $2.3 million ($0.03 per share).

A mill worker stoppage that started on March 30, 2011 was resolved on April 30, 2011. The work stoppage resulted in two days lost production in the first quarter or approximately 500 ounces of gold and 28,000 ounces of silver. Since underground mining continued the Company mined approximately 55,000 tonnes of ore, which it started to process through the mill when work resumed. As management expected to operate the mill at about 90% of its design capacity during 2011, the Company expects to be able to continue normal operations and mill the stockpiled ore before the end of 2011.

Balance Sheet Remains Strong

Cash and cash equivalents increased to $65.4 million at March 31, 2011 from the December 31, 2010 balance of $58.3 million. The Company continues to invest in organic growth while building on its balance sheet strength.

Capital expenditures during the first quarter 2011 totaled $5.2 million and were spent mainly on underground development and exploration. In 2011, capital expenditures are expected to total approximately $31 million. With its cash balance and anticipated cash flows, Primero remains fully funded to double production by 2013 via organic growth and also remains positioned to take advantage of acquisition opportunities.

Corporate Strategy Update

An important strategy has been to mitigate the adverse tax impact arising from the silver purchase agreement. As a preliminary measure the Company announced on March 21, 2011, that it had purchased silver call options at a cost of $2.2 million in order to improve its leverage to silver and protect the Company against the adverse tax impact of a rising silver price as a result of the silver purchase agreement. As at March 31, 2011 the silver call options were worth $2.9 million. On April 19, 2011 the Company realized a $0.8 million gain on the sale of the April call options.

The Company announced today that it has accelerated the tax depreciation of the purchase price allocated to the mineral concessions of the San Dimas mine acquisition resulting in an approximately $380 million tax pool within Mexico. Although this strategy results in a deferral rather than an overall reduction of cash taxes, it is expected to shelter the Company's income at an important time in its evolution, when investments in organic growth will be critical to its success. It also provides time to seek solutions to the tax imbalances currently paid by the Company during a period when the gold to silver price ratio has moved out of historical levels.

Primero also announced today that in order to improve accessibility and liquidity of the Company's shares, specifically for global investors, it has made an application to list its common shares on the New York Stock Exchange. A listing committee hearing has been scheduled for late May 2011 and the Company will provide an update on the results of the hearing.

In addition, the Company continues to evaluate strategic growth alternatives on an ongoing basis in support of its corporate objective to become an intermediate gold producer by the end of 2013.

2011 Production Guidance Maintained

Primero maintains its full year 2011 production guidance and reiterates that its three-year plan shows production(7) at San Dimas nearly doubling to approximately 200,000 gold equivalent ounces by 2013.

---------------------------------------------------------------------------
As at May 17, 2011                                             Outlook 2011
---------------------------------------------------------------------------
Gold equivalent production(1)
 (gold equivalent ounces)                                 110,000 - 120,000
Gold production
 (ounces)                                                  90,000 - 100,000
Silver spot sales by Primero(5)
 (ounces)                                                 500,000 - 750,000
Silver production(5)
 (ounces)                                             4,500,000 - 5,000,000
Total cash costs(2)
 (per gold equivalent ounce)                                    $550 - $570
Total cash costs(2) - by-product
 (per gold ounce)                                               $350 - $370
---------------------------------------------------------------------------

Silver Sales at Spot Expected in Second Quarter 2011

Primero reports that 1.37 million ounces of silver were delivered to a subsidiary of Silver Wheaton Corp.(5) ("Silver Wheaton") under the amended silver purchase agreement during the first quarter. Given the silver purchase agreement's annual threshold of 3.5 million ounces of silver, and taking into account the 31 day mill worker stoppage during April, the Company expects it will begin selling fifty percent of the silver produced at spot prices during Q2 2011. The Company estimates that it will sell between 500,000 and 750,000 ounces of silver at spot realized prices in 2011 (before the August 6, 2011 agreement anniversary).

Continued Positive Results from Sinaloa Graben

During the first quarter of 2011, extensions of the high-grade mineralization in the Sinaloa Graben were discovered. The Sinaloa Graben is in the western block of the San Dimas mine. A north-south tunnel developed in the middle of this block crosscut and provided direct access to this mineralized system. The system is composed of multiple veins, as is characteristic of other blocks in the San Dimas district. So far, two of the veins named Elia and Aranza, have been explored through drilling and drifting obtaining significant results.

The Elia and Aranza veins are new veins that are not known to exist in the adjacent Central Block, currently the main mining area at San Dimas. The Elia and Aranza veins run sub-parallel and are separated by 300 metres.

The Elia vein has been exposed along the exploration drift for 141 metres showing continuous mineralization. A systematic sampling was carried out every 3 metres across the drift. The average grade over 141 metres was 14 grams per tonne of gold and 1,230 grams per tonne of silver.

The Aranza vein has been exposed along the exploration drift for 79 metres showing continuous mineralization. A systematic sampling was carried out every 3 metres across the drift. The average grade over 79 metres was 5.3 grams per tonne of gold and 553 grams per tonne of silver.

Conference Call and Webcast Details

A conference call will be held on Tuesday, May 17, 2011 at 11:00 a.m. Eastern Time to discuss the first quarter operating and financial results.

Participants may join the call by dialing North America toll free 1-866-946-0484, or 1-646-216-4773 for calls outside Canada and the U.S., and entering the participant passcode 6011380#.

A recorded playback of the Q1 2011 results call will be available until August 17, 2011 by dialing North America toll free 1-866-551-4520 and entering the call back passcode 272008#.

A live and archived webcast of the conference is also available at www.primeromining.com.

This release should be read in conjunction with Primero's first quarter 2011 financial statements and MD&A report on the Company's website, www.primeromining.com, in the "Financial Reports" section under "Investors", or on the SEDAR website at www.sedar.com.

(1) "Gold equivalent ounces" include silver ounces produced, and converted to a gold equivalent based on a ratio of the average commodity prices received for each period. The ratio for the first quarter was 343:1 based on the realized prices of $1,387 per ounce of gold and $4.04 per ounce of silver, as per the silver purchase agreement. The ratio for the 2011 outlook is 211:1 based on $1,400 per ounce of gold and an average of $6.63 per ounce of silver as per the silver purchase agreement.

(2) Total cash costs per gold equivalent ounce and total cash costs on a by-product basis are non-GAAP measures. The Company reports total cash costs on a production basis. Total cash costs per gold equivalent ounce is defined as cost of production (including refining costs) divided by the total number of gold equivalent ounces produced. Total cash costs on a by-product basis are calculated by deducting the by-product silver credits from operating costs. In the gold mining industry, these are common performance measures but do not have any standardized meaning, and are non-GAAP measures. The Company follows the recommendations of the Gold Institute standard. The Company believes that, in addition to conventional measures, prepared in accordance with GAAP, certain investors use this information to evaluate the Company's performance and ability to generate cash flow. Accordingly, it is intended to provide additional information and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with GAAP. See the first quarter 2011 MD&A for a reconciliation of total cash costs to reported operating expenses (the nearest GAAP measure).

(3) Operating cash flow before working capital changes and operating cash flows before working capital changes per share are non-GAAP measures which the Company believes provide a better indicator of the Company's ability to generate cash flow from its mining operations. See the first quarter 2011 MD&A for a reconciliation of operating cash flows to GAAP.

(4) Prior to the acquisition of the San Dimas Mine in August 2010, the Company did not have any producing mines and hence did not realize any revenue or earnings from mine operations. Results for the first quarter 2011 are therefore not comparable to the first quarter 2010. The discussion in this News Release includes comparisons with the three months ended December 31, 2010, which was the first full quarter that the Company operated the San Dimas mine.

(5) According to the silver purchase agreement between the Company and Silver Wheaton Corp., until August 6, 2014 Primero will deliver to Silver Wheaton a per annum amount equal to the first 3.5 million ounces of silver produced at San Dimas and 50% of any excess at $4.04 per ounce (increasing by 1% per year). Thereafter Primero will deliver to Silver Wheaton a per annum amount equal to the first six million ounces of silver produced at San Dimas and 50% of any excess at $4.20 per ounce (increasing by 1% per year). The Company will receive silver spot prices only after the total threshold amount has been delivered each year.

(6) Adjusted net loss and adjusted net loss per share are non-GAAP measures. Neither of these non-GAAP performance measures has any standardized meaning and is therefore unlikely to be comparable to other measures presented by other issuers. The Company believes that, in addition to conventional measures prepared in accordance with GAAP, the Company and certain investors use this information to evaluate the Company's performance. Accordingly, it is intended to provide additional information and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with GAAP. Refer to the first quarter 2011 MD&A for a reconciliation of adjusted net loss to reported net loss (the nearest GAAP measure).

(7) Information regarding the Company's three-year plan can be found in the Company's January 17, 2011 news release, available on SEDAR at www.sedar.com. The three-year plan represents forward looking information. Information regarding the assumptions and risks associated with the three-year plan is available at the end of the January 17, 2011 news release, under the heading Cautionary Statement on Forward-Looking Information. Readers should carefully review all such assumptions and risks, and should not place undue reliance on forward looking information.

About Primero

Primero Mining Corp. is a Canadian-based precious metals producer and owns 100% of the San Dimas gold-silver mine in Mexico. Primero offers immediate exposure to un-hedged, low cash cost gold production with a substantial resource base in a politically stable jurisdiction. The Company intends to become an intermediate gold producer by building a portfolio of high quality, low cost precious metals assets in the Americas.

Primero's website is www.primeromining.com.

TECHNICAL INFORMATION AND QUALIFIED PERSON/QUALITY CONTROL NOTES

The technical disclosure and mineral resource and reserve estimates contained in this news release have been prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101"). The technical information has been included herein with the consent and prior review of Mr. Joaquin Merino-Marquez, Vice President, Exploration, Primero Mining Corp., who is a "Qualified Person" for the purposes of NI 43-101. The Qualified Person has verified the data disclosed, including sampling, analytical and test data underlying the information or opinions contained herein. Drill samples are prepared by SGS de Mexico, S.A. de C.V. in Durango, Mexico.

CAUTIONARY STATEMENT ON FORWARD-LOOKING INFORMATION

The information in this news release has been prepared as at May 17, 2011. This news release contains certain statements that may be deemed "forward-looking statements". Forward-looking statements are statements that are not historical facts and are generally, but not always, identified by the words "expects", "plans", "anticipates", "believes", "intends", "estimates", "projects", "potential" and similar expressions, or that events or conditions "would", "may", "could" or "should" occur. The forward-looking statements in this press release include statements regarding the Company's forward-looking production guidance, including estimated ore grades, drilling results, metal production, life of mine horizons, recovery rates, mill throughput, projected exploration and capital expenditures, including costs and other estimates upon which such projections are based; the Company's goal to increase its mineral reserves and resources; intentions to become an intermediate gold producer; plans to double production by 2013; the ability of the Company to implement initiatives to lower its effective tax rate; and its intention to list on the NYSE. The forward-looking statements are based on reasonable assumptions, including assumptions related to there being no significant disruptions affecting operations, whether due to labour disruptions, supply disruptions, damage to equipment, natural occurrences, political changes, title issues or otherwise; that permitting, production and expansion at the Company's projects proceeds on a basis consistent with current expectations, and that the Company does not change its plans relating to such projects; that the exchange rate between the Canadian dollar, Mexican peso and the United States dollar will be approximately consistent with current levels or as set out in this news release; that prices for gold and silver will be consistent with the Company's expectations; that prices for key mining and construction supplies, including labour costs, remain consistent with Company's current expectations; that current estimates of mineral reserves, mineral resources, mineral grades and metal recovery are accurate; that there are no material delays in the timing for completion of ongoing growth projects; that the Company's current plans to optimize production are successful; that there are no material variations in the current tax and regulatory environment; the assumptions set out elsewhere in this news release; and the assumptions set out in the Company's first quarter 2011 Financial Statements and MD&A, and in respect of the Company's growth plans and the information under the heading "Strategy and Outlook Focused On Growth", under the heading "Cautionary Statement on Forward-Looking Information" in the Company's January 17, 2011 news release. Factors that may cause actual results to vary from anticipated results include the risks such as the volatility of prices of gold and silver; uncertainty of mineral reserves, mineral resources, mineral grades and metal recovery estimates; uncertainty of future production, capital expenditures, and other costs; currency fluctuations; financing of additional capital requirements; cost of exploration and development programs; mining risks; risks associated with foreign operations; governmental and environmental regulation; the volatility of the Company's stock price; and risks associated with the Company's by-product metal derivative strategies; that Primero may not find acquisition targets at attractive prices; and other risks disclosed in the Company's first quarter 2011 MD&A, available under the Company's profile on SEDAR at www.sedar.com. Although Primero believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results may differ materially from those in forward looking statements. Forward looking statements are based on the beliefs, estimates and opinions of Primero's management on the date the statements are made. Primero undertakes no obligation to update these forward-looking statements in the event that management's beliefs, estimates or opinions, or other factors, should change, except as required by law. SUMMARIZED FINANCIAL AND OPERATING RESULTS AND FINANCIAL STATEMENTS FOLLOW

SUMMARIZED FINANCIAL & OPERATING RESULTS
(in thousands of United States dollars, except per share and per ounce
 amounts - unaudited)

                                                     Three Months Ended

                                                   March 31     December 31
                                               2011        2010        2010
---------------------------------------------------------------------------
Operating Data
Tonnes of ore milled                        162,517     145,260     168,875
Produced
  Gold equivalent (ounces)                   24,083      29,334      24,771
  Gold (ounces)                              20,498      24,291      21,171
  Silver (million ounces)                      1.23        1.21        1.21
Sold:
  Gold equivalent (ounces)                   24,506      29,334      30,480
  Gold (ounces)                              20,506      24,916      27,329
  Silver (million ounces):                     1.37        1.21        1.06
Average realized prices:                                      -
  Gold ($/ounce):                          $  1,387    $  1,104    $  1,359
  Silver ($/ounce):                        $   4.04    $   4.04    $   4.04
Total cash costs (per gold ounce):                            -
  Gold equivalent basis                    $    624    $    467    $    645
  By-product basis                         $    491    $    354    $    524

Financial Data
(in thousands of US dollars except per
 share amounts)
Revenues                                     33,988           -      41,425
Earnings from mine operations                10,912           -      13,250
Net income/(loss)                            (7,895)       (318)      6,893
Basic and diluted income/(loss) per
 share                                        (0.09)      (0.11)       0.08
Operating cash flows before working
 capital changes                             (1,521)       (159)     14,044
Assets
  Mining interests                          482,746         222     484,360
  Total assets                              658,044       1,367     656,733
Liabilities
  Long-term liabilities                     114,850           -     114,329
  Total liabilities                         233,275         141     226,687
Equity                                      424,769       1,226     430,046
Weighted average shares outstanding
 (basic) (000's)                             87,773       2,990      87,703



SUMMARIZED OPERATING DATA

                                       Three months ended
                      31-Mar-11  31-Dec-10  30-Sep-10  30-Jun-10  31-Mar-10
---------------------------------------------------------------------------
Operating Data (1)
Tonnes of ore milled    162,517    168,875    145,893    152,225    145,260
Average mill head
 grade (grams/tonne)
  Gold                     4.03       4.01       4.03       4.45       5.47
  Silver                    250        236        227        244        273
Average recovery
 rate (%)
  Gold                       97%        97%        97%        97%        98%
  Silver                     94%        94%        94%        94%        95%
Produced
  Gold equivalent
   (ounces)              24,083     24,771     21,790     24,764     29,334
  Gold (ounces)          20,498     21,171     18,419     20,918     24,921
  Silver (million
   ounces)                 1.23       1.21       1.01       1.11       1.21
Sold
  Gold equivalent
   (ounces)              24,506     30,480     16,070     24,222     29,344
  Gold (ounces)          20,506     27,329     12,650     20,483     24,916
  Silver (million
   ounces)                 1.37       1.06       1.02       1.08       1.21
Average realized
 price (per ounce)
  Gold                 $  1,387   $  1,359   $  1,205   $  1,167   $  1,104
  Silver (2)           $   4.04   $   4.04   $   4.04   $   4.04   $   4.04
Total cash costs
 (per gold ounce)
 (2)(3)
  Gold equivalent
   basis               $    624   $    645   $    653   $    590   $    467
  By-product basis     $    491   $    524   $    552   $    484   $    354

(1) The San Dimas Mine was acquired by Primero from Goldcorp Inc. on August
    6, 2010. The comparative operating data was derived from records
    maintained by Goldcorp Inc.
(2) Due to a silver purchase agreement originally entered into in 2004, for
    the periods shown, all silver produced was sold to Silver Wheaton
    Caymans at a fixed price. In the future, as a result of restructuring
    the silver purchase agreement, Primero will be able to sell some silver
    production at spot prices, subject to minimum threshold amounts being
    met(5).
(3) Total cash costs per gold ounce on a gold equivalent and by-product
    basis are non-GAAP financial measures. Refer to "Non-GAAP measure -
    Total cash costs per gold ounce calculation" in the Company's first
    quarter 2011 MD&A for a reconciliation to operating expenses. By-product
    cash costs per gold ounce reported for the San Dimas Mine by Goldcorp
    Inc. for the three months ended June 30, 2010 and March 31, 2010 were
    $457 and $374, respectively. The by-product cash costs presented in this
    table prior to August 6, 2010 are based on internal financial records of
    the San Dimas operations and are calculated on a production basis and do
    not contain certain inter-company transactions that were reversed for
    Goldcorp's consolidated reporting. They are therefore not directly
    comparable to the by-product cash costs as reported by Goldcorp Inc.



PRIMERO MINING CORP.
Condensed consolidated interim statements of operations and comprehensive
 loss
Three months ended March 31,
(In thousands of United States dollars, except for share and per share
 amounts)
(Unaudited)

---------------------------------------------------------------------------
                                                               Three months
                                                             ended March 31,
                                                        2011           2010
---------------------------------------------------------------------------
                                                           $              $

Revenue                                               33,988              -
---------------------------------------------------------------------------

Operating expenses                                   (15,868)             -
Depreciation and depletion                            (7,208)             -
---------------------------------------------------------------------------
Total cost of goods sold                             (23,076)             -
---------------------------------------------------------------------------

Earnings from mine operations                         10,912              -
General and administration expenses                   (4,503)          (323)
---------------------------------------------------------------------------

Earnings (loss) from operations                        6,409           (323)
Foreign exchange loss                                 (1,569)             -
Finance income                                            21              -
Finance expense                                       (2,949)             -
Gain on derivative contracts                           3,127              -
Other income                                              11              5
---------------------------------------------------------------------------

Earnings (loss) before income taxes                    5,050           (318)
---------------------------------------------------------------------------

Income taxes                                         (12,945)             -

Net loss for the period                               (7,895)          (318)
Other comprehensive income
  Currency translation gain                              720              -
---------------------------------------------------------------------------
Total comprehensive loss                              (7,175)          (318)
---------------------------------------------------------------------------
---------------------------------------------------------------------------

Basic and diluted loss per share                       (0.09)         (0.11)
---------------------------------------------------------------------------
---------------------------------------------------------------------------

Weighted average number of common
  shares outstanding - basic and diluted          87,772,801      2,990,099
---------------------------------------------------------------------------
---------------------------------------------------------------------------



PRIMERO MINING CORP.
Condensed consolidated interim balance sheets
(In thousands of United States dollars)
(Unaudited)

---------------------------------------------------------------------------
                                     March 31,   December 31,     January 1,
                                         2011           2010           2010
---------------------------------------------------------------------------
                                            $              $              $

Assets
Current assets
  Cash                                 65,380         58,298          1,018
  Trade and other receivables          89,563         97,481            158
  Prepaid expenses                      4,917          5,165             34
  Inventories                           4,577          4,874              -
  Derivative asset                      2,945              -              -
---------------------------------------------------------------------------
Total current assets                  167,382        165,818          1,210

Mining interests                      482,746        484,360            172
Deferred tax asset and profit
 sharing                                7,916          6,555              -
---------------------------------------------------------------------------
Total assets                          658,044        656,733          1,382
---------------------------------------------------------------------------
---------------------------------------------------------------------------

Liabilities
Current liabilities
  Trade and other payables             43,425         37,358            169
  Current portion of long-term
   debt                                75,000         75,000              -
---------------------------------------------------------------------------
Total current liabilities             118,425        112,358            169

Decommissioning liability              10,590          9,775              -
Long-term debt                        102,477        100,769              -
Derivative liability                      213          2,630              -
Other long-term liabilities             1,570          1,155              -
---------------------------------------------------------------------------
Total liabilities                     233,275        226,687            169
---------------------------------------------------------------------------

Equity
Share capital                         421,174        420,994          2,755
Warrant reserve                        35,299         35,396            722
Contributed surplus reserve            10,566          8,751          1,373
Foreign currency translation
 reserve                                  858            138            138
Deficit                               (43,128)       (35,233)        (3,775)
---------------------------------------------------------------------------
Total equity                          424,769        430,046          1,213
---------------------------------------------------------------------------
Total liabilities and equity          658,044        656,733          1,382
---------------------------------------------------------------------------
---------------------------------------------------------------------------



PRIMERO MINING CORP.
Condensed consolidated interim statements of cash flows
Three months ended March 31,
(In thousands of United States dollars)
(Unaudited)

---------------------------------------------------------------------------
                                                               Three months
                                                             ended March 31,
                                                        2011           2010
---------------------------------------------------------------------------
                                                           $              $

Operating activities
  Net loss                                            (7,895)          (318)
  Adjustments for:
    Depreciation and depletion                         7,208              9
    Unwinding of discount and additions to
     decomissionning liability                           815              -
    Non-cash interest expense                          2,556              -
    Share-based payments                               2,230            150
    Deferred income tax expense                       (1,229)             -
    Deferred profit sharing                             (132)             -
    Purchase of derivative contracts                  (2,235)             -
    Unrealized gain on derivative asset               (3,127)             -
    Unrealized foreign exchange loss                     288              -
---------------------------------------------------------------------------
                                                      (1,521)          (159)

  Change in non-cash working capital                  13,300             30
---------------------------------------------------------------------------
Cash provided by (used in) operating
 activities                                           11,779           (129)
---------------------------------------------------------------------------

Investing activities
  Expenditures on exploration and evaluation
   assets                                             (1,916)             -
  Expenditures on mining interests                    (3,296)           (13)
  Proceeds on sale of property and equipment               -              3
---------------------------------------------------------------------------
Cash used in investing activities                     (5,212)           (10)
---------------------------------------------------------------------------

Financing activity
  Proceeds on exercise of warrants and
   options                                                84            103
---------------------------------------------------------------------------
Cash provided by financing activity                       84            103
---------------------------------------------------------------------------

Effect of foreign exchange rate changes on
 cash                                                    431             29
---------------------------------------------------------------------------

Increase (decrease) in cash                            7,082             (7)
Cash, beginning of period                             58,298          1,018
---------------------------------------------------------------------------
Cash, end of period                                   65,380          1,011
---------------------------------------------------------------------------
---------------------------------------------------------------------------

Supplemental cash flow information

FOR FURTHER INFORMATION PLEASE CONTACT:
        Primero Mining Corp.
        Joseph F. Conway
        President & CEO
        (416) 814 3160
        jconway@primeromining.com

        Primero Mining Corp.
        Tamara Brown
        VP, Investor Relations
        (416) 814 3168
        tbrown@primeromining.com
        www.primeromining.com

Source: Primero Mining Corp.
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By entering the External Site, you further acknowledge and agree that the disclaimer of warranties and limitations of liability set out in this disclaimer shall apply regardless of the causes, circumstances or form of action giving rise to the loss, damage, claim or liability, even if such loss, damage, claim or liability is based upon breach of contract (including, without limitation, a claim of fundamental breach or breach of a fundamental term), tort (including, without limitation, negligence), strict liability or any other legal or equitable theory, and even if Primero and Virtua are advised of the possibility of the loss, damage, claim or liability. The waiver and release specifically includes, without limitation, any and all rights and claims pertaining to the processing of personal data, including but not limited to any rights under any applicable data protection statute(s).

If in any jurisdiction, any part of this disclaimer is held to be unenforceable by a court of competent jurisdiction, such part of this disclaimer shall be restricted or eliminated to the minimum extent and the remaining disclaimer shall otherwise remain in full force and effect.

Please note the information presented is deemed representative at the time of its original release. Changes in historical information may occur due to adjustments in accounting and reporting standards & procedures.

Non-GAAP Information

In addition to disclosing results determined in accordance with GAAP, Primero may also disclose certain non-GAAP information, including certain ratios, operational and miscellaneous data, as well as net income and income per share income that make certain adjustments or exclude certain charges and gains that are outlined in the schedules included in this website. Management believes that this non-GAAP information provides investors with additional information to assess Primero’s operating performance and assists investors in comparing our operating performance to prior periods. Management uses this non-GAAP information, along with GAAP information, in evaluating its historical operating performance.

The non-GAAP information is not prepared in accordance with GAAP and may not be comparable to non-GAAP information used by other companies. The non-GAAP information should not be viewed as a substitute for, or superior to, other data prepared in accordance with GAAP.

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