International Tower Hill Mines Ltd.
TSX : ITH
NYSE Amex : THM
FRANKFURT : IW9

International Tower Hill Mines Ltd.

July 23, 2013 17:00 ET

International Tower Hill Mines Announces Livengood Gold Project Feasibility Study Results

VANCOUVER, BRITISH COLUMBIA--(Marketwired - July 23, 2013) - International Tower Hill Mines Ltd. ("ITH" or the "Company") (TSX:ITH)(NYSE MKT:THM)(FRANKFURT:IW9) today announced the results of a Feasibility Study (the "FS") for its Livengood Gold Project (the "Project") located near Fairbanks, Alaska. The FS evaluated a 100,000 ton per day project that would produce 8 million ounces of gold over 14 years. Using the trailing three year gold price of $1,500 per ounce, the project generates a minimal positive return. The Company continues to pursue opportunities as identified in the FS for potential cost reductions as well as scenarios which would require less initial capital expenditure. All dollar figures in this news release are stated in US Dollars.

A conference call to discuss the results of the FS will be held tomorrow morning at 8:30am ET, Wednesday, July 24, 2013. Call-in details are located at the end of this release.

"The results of the Feasibility Study confirm that the Livengood project is a large, well proven resource that can significantly benefit from economies of scale to generate good economic returns," said Don Ewigleben, CEO of International Tower Hill Mines. "While the large project FS results are not economically robust in today's gold market, the Livengood project remains a very significant gold deposit in one of the most favorable jurisdictions in the world. The Company is highly focused on advancing lower cost opportunities identified in the FS. The Company has also implemented numerous cost savings initiatives that will allow it to continue with the opportunities review and maintain the project well into 2015. We will also be maintaining the necessary environmental baseline activities to move the permitting process forward and maintain the integrity and usability of five years of data already compiled for any of the various production alternatives."

FS Overview

The Company controls 100% of the Project with a mineral resource of 731 million Measured tonnes at an average grade of 0.61 g/tonne (14.4 million ounces at 0.3 g/tonne cut-off), 71 million Indicated tonnes at an average grade of 0.56 g/tonne (1.3 million ounces at 0.3 g/tonne cut-off) and 266 million Inferred tonnes at an average grade of 0.52 g/tonne (4.4 million ounces at 0.3 g/tonne cut-off).

The FS has converted a portion of these mineral resources into proven reserves of 434 million tonnes at an average grade of 0.69 g/tonne (9.6 million ounces) and probable reserves of 20 million tonnes at an average grade of 0.70 g/tonne (454,000 ounces). The mine plan provides sufficient ore to support an annual production rate of approximately 577,600 ounces over an estimated 14 year mine life.

Project Opportunities

The Company plans to continue to advance the Project within the limitations of its working capital on hand while safeguarding the asset for development in the future. As of June 30, 2013, the Company has approximately $19.9 million in cash. Discussions continue with several potential strategic partners with longer term development horizons for advancement of the Project.

Project Location

The Livengood Gold Project is connected by an existing paved highway 70 miles northwest of the town of Fairbanks in Central Alaska. The Project is located in an active mining district that has been mined for gold since 1914. The State of Alaska land use plan designates mining as the primary surface use for the Livengood area.

Project Summary

The Project design is a conventional, owner-operated surface mine that will utilize large-scale mining equipment in a blast/load/haul operation. Ore is planned to be processed in a 100,000 ton per day comminution circuit consisting of a primary gyratory crusher, wet grinding in a single semi-autogenous (SAG) mill and two ball mills, followed by a gravity gold circuit and a conventional carbon in leach (CIL) circuit.

Infrastructure

The Project would include a lined tailings management facility, two water reservoirs, an administration office/shop/warehouse complex and a 440 person camp. The Project would also include construction of a 50 mile transmission line to the site from the existing grid power near Fairbanks, Alaska.

Environmental and Community Relations

Five continuous years of baseline environmental work continues to show that all aspects of the Project can be successfully and safely managed. The design of the tailings facility incorporates best practices including a lined rock fill structure with a lined tailings basin. The development team has had considerable experience working with Alaska's large mine permitting process and has a proven and respected track record of developing projects safely and in an environmentally sound manner. The Project has already and will continue to provide local economic opportunities with local access to a highly skilled and available work force. The Company is also working with the town of Fairbanks and the nearby community of Minto to seek early input on the Project and to explore ways to maximize economic benefits to the local communities.

Results of the 100,000 Ton Per Day, Large Mine Feasibility Study include:

Summary of Feasibility Results
OPERATING METRICS
Mill Throughput 100,000 tons/day
Head Grade - LOM 0.69 g/tonne
Head Grade - Year 1-5 0.83 g/tonne
Gold Recovery 80.3 %
Mine Life 14 years
Total Ounces Produced 8,086,400 Troy ounces
Average Annual Production - LOM 577,600 Troy ounces
Average Annual Production - Year 1-5 698,500 Troy ounces
Total Ore Processed 501 Million tons
Total Waste 720 Million tons
Annual Mining Rate 98 Million tons
Waste Rock to Mill Ore (tonnes) Ratio - Year 1-14 1.34:1 Waste to Ore
Low Grade Stockpile Maximum Size 93 Million tons
FINANCIAL METRICS
CAPEX - Initial 2.790 $Billion
CAPEX - Sustaining 667 $Million
Reclamation & Closure 353 $Million
OPEX - Mining 1.67 $/ton material
OPEX - Processing 10.45 $/ton ore
OPEX - G&A 0.89 $/ton ore
OPEX - Operating Cost - LOM 1,030 $/Ounce
OPEX - Operating Cost - Year 1-5 885 $/Ounce
All-In Cost Pre-Tax (CAPEX+OPEX) - LOM 1,447 $/Ounce
All-In Cost Pre-Tax (CAPEX+OPEX) - Year 1-5 1,272 $/Ounce
All-In Cost After-Tax (CAPEX+OPEX) - LOM 1,474 $/Ounce
All-In Cost After-Tax (CAPEX+OPEX) - Year 1-5 1,292 $/Ounce

Gold Price Sensitivity Analysis

The following table shows the after-tax economics at various gold prices

Gold Price ($/Oz) NPV 5% ($M) IRR (%) Payback (Years)
$1200 (1,835 ) -16.1 N/A
$1300 (1,336 ) -7.2 N/A
$1400 (854 ) -1.9 N/A
$1500 (440 ) 1.7 10.8
$1600 (50 ) 4.6 8.8
$1700 336 7.3 7.2
$1800 723 9.7 6.1
$1900 1,109 12.0 5.2
$2000 1,493 14.1 4.6
$2100 1,869 16.1 4.2
$2200 2,219 17.8 3.8

Capital Costs

Key capital expenditures for initial and sustaining capital requirements are identified in the following table.

$Million
Initial Sustaining
Process Facilities $ 1,119 $ 26
Infrastructure Facilities 708 506
Power Supply 129 -
Mine Equipment 189 126
Mine Development 177 -
Other Owners Costs 166 9
Contingency 271 -
Subtotal Before Reclamation 2,758 667
Funding of Reclamation Trust Fund (1) 32 226
Total $ 2,790 $ 893
Rounding of some figures may lead to minor discrepancies in totals.
(1) Includes initial funding, total $353 Million estimated costs. See operating cost table.

Annual Gold Production

The chart below highlights the anticipated production schedule. Total life-of-mine production is anticipated to be 8,086,400 ounces. For the first five years, it is anticipated that average annual production would be 698,500 ounces.

Year Mill Feed Grade (g/tonne) Ounces Produced (000)
1 1.08 763.2
2 0.94 844.2
3 0.67 594.0
4 0.76 671.3
5 0.74 619.7
6 0.63 558.3
7 0.66 590.3
8 0.66 582.3
9 0.67 554.2
10 0.72 562.9
11 0.82 720.7
12 0.54 421.6
13 0.39 321.4
14 0.39 282.2
LOM 0.69 8,086.4
Rounding of some figures may lead to minor discrepancies in totals.

All-in Costs

The table below highlights the all-in operating cost of production over the life of the Project:

All-in Sustaining Cost of Production $/Ounce LOM ($Million)
On-Site Mine Operating Costs $ 933 $ 7,543
Royalties 45 362
Third-Party Smelting, Refining and Transport Costs 9 75
Sub-Total 987 7,980
Reclamation & Remediation 43 353
Sub-Total Production Cost Before Capital 1,030 8,333
Capital Expenditures (initial and sustaining) (1) 416 3,367
All-In Costs - Pre-Tax 1,447 11,700
Mining and Income Taxes 27 220
All-In Costs - After-Tax $ 1,474 $ 11,920
Rounding of some figures may lead to minor discrepancies in totals.
(1) Excludes $32M upfront funding included in reclamation and remediation above and $57M of recoverable initial stores inventory.

Project Mineral Reserves and Resources

The table below illustrates the reserve estimate for the Project, calculated at a gold price of $1,500 per ounce.

Rock Type Tonnes 000's g Au/t Au Ounces 000's
RT4 Cambrian 58,247.3 0.639 1,196.6
RT5 Sunshine Upper Sediments 126,592.2 0.576 2,344.6
RT6 Upper Sediments 80,912.3 0.733 1,906.0
RT7 Lower Sediments-Bleached 51,020.0 0.772 1,266.3
RT8 Sunshine Volcanics 6,707.4 0.659 142.1
RT9 Volcanics 111,013.9 0.775 2,766.0
Proven Totals 434,493.0 0.689 9,621.5
RT4 Cambrian
5,129.8

0.720

118.7
RT5 Sunshine Upper Sediments 1,503.4 0.535 25.8
RT6 Upper Sediments 2,754.6 0.637 56.4
RT7 Lower Sediments-Bleached 4,005.3 0.726 9.5
RT8 Sunshine Volcanics 2,321.2 0.669 49.9
RT9 Volcanics 4,416.4 0.773 109.7
Probable Totals 20,130.8 0.702 454.0
RT4 Cambrian 63,377.1 0.645 1,315.2
RT5 Sunshine Upper Sediments 128,095.6 0.576 2,370.4
RT6 Upper Sediments 83,666.9 0.730 1,962.4
RT7 Lower Sediments-Bleached 55,025.3 0.769 1,359.8
RT8 Sunshine Volcanics 9,028.6 0.662 192.0
RT9 Volcanics 115,430.3 0.775 2,875.7
Proven + Probable Totals 454,623.8 0.689 10,075.6
Rounding of some figures may lead to minor discrepancies in totals.

The table below illustrates the updated mineral resource estimate for the Project.

Classification Gold Cutoff (g/t) Tonnes
(Million)
Gold (g/t) Gold Ounces (Million)
Measured 0.20 994 0.52 16.4
Indicated 0.20 112 0.45 1.6
Total M & I 0.20 1,106 0.51 18.0
Inferred 0.20 438 0.41 5.8
Measured 0.30 731 0.61 14.4
Indicated 0.30 71 0.56 1.3
Total M & I 0.30 802 0.61 15.7
Inferred 0.30 266 0.52 4.4
Measured 0.50 370 0.82 9.8
Indicated 0.50 31 0.80 0.8
Total M & I 0.50 401 0.82 10.6
Inferred 0.50 92 0.76 2.3
Measured 0.70 179 1.08 6.2
Indicated 0.70 13 1.09 0.5
Total M & I 0.70 192 1.08 6.7
Inferred 0.70 34 1.08 1.2
Mineral resources that are not mineral reserves do not have demonstrated economic viability. Mineral resource estimates do not account for mineability, selectivity, mining loss and dilution. These mineral resource estimates include inferred mineral resources that are normally considered too speculative geologically to have economic considerations applied to them that would enable them to be categorized as mineral reserves. There is also no certainty that these inferred mineral resources will be converted to measured and indicated categories through further drilling, or into mineral reserves, once economic considerations are applied.

Metallurgy Recovery by Rock Type

The Company has completed extensive metallurgical test work on the five rock types that comprise 98% of the reserve. Recovery rates by rock type using gravity and carbon-in-leach recovery of gravity tail are shown in the table below:

Rock Type Gold Recovery %
RT4 Cambrian 84.2
RT5 Sunshine Upper Sediments 87.7
RT6 Upper Sediments 76.7
RT7 Lower Sediments-Bleached 58.5
RT9 Volcanics 84.8

Next Steps and Opportunities

The Company believes that mill throughput and production schedule optimization studies may provide opportunities to reduce project capital costs. A lower mill throughput may offer an opportunity to enhance mill head grades in early years by a more aggressive stockpile management strategy than is assumed in the FS.

The Company will also continue to advance environmental baseline work in support of future permitting in order to better position the Project for a construction decision when warranted by market conditions.

There is also opportunity to expand the mineable resource by increasing the in-pit resource, as additional drilling may improve the classification of the material contained within the pit. Additional drilling may expand the resource at depth and to the southwest, incorporating mineralized material below the current grade model. Multiple exploration targets have been identified and may increase the resource with additional exploration.

The Company has also identified several opportunities to improve the performance of the Project that warrant further study including verification of preliminary indications of a higher head grade, verify modeling to improve recovery through intensive cyanide leach of gravity concentrates, reducing reagent consumption and energy costs.

Detailed Report

A NI 43-101 Technical Report that summarizes the results of the FS will be filed on SEDAR at www.sedar.com within 45 days of this press release and will be available on the Company's website www.ithmines.com at that time.

Qualified Persons

The FS was prepared by Samuel Engineering, Inc., AMEC Environment & Infrastructure, Inc. as well as others listed below. The detailed engineering design to estimate capital costs are within a +/- 15% accuracy. The scientific and technical data contained in this news release pertaining to the Project has been reviewed, verified and approved by the following Qualified Persons under NI 43-101 who consent to the inclusion of their names in this release.

Qualified Person Company Scope of Responsibility
Richard Kunter, Qualified Person (No. 01217QP Mining and Metallurgical Society of America) Samuel Engineering Process Engineering
Charlie Rehn, P.E. (Utah No. 7261612) AMEC Geotechnical Engineering
Mike Levy, P.E. (Colorado No. 40268) SRK Mine Slope Stability
Tim Carew, P. Geo. Association of Professional Engineers and Geoscientists of British Columbia (Professional Geoscientist 19706) Reserva International Resource Estimation
Neil Prenn, P.E. (Nevada No. 7844) Mine Development Associates Mining and Reserve Estimation
Chris Puchner, CPG (AIPG No. 07048) Tower Hill Mines Geology

Conference Call Details

The Company will host a conference call at 8:30 am ET Wednesday, July 24, 2013 to discuss the FS. Mr. Don Ewigleben, President and CEO of International Tower Hill Mines, will chair the call. All interested parties can join the conference call by dialing 1-888-231-8191 or 647-427-7450. Please dial in 15 minutes prior to the call to secure a line. The conference call will be archived for replay until July 31, 2013 at midnight. To access the archived conference call, please dial 1-855-859-2056 or 416-849-0833 and enter the reservation code 17471473. This call will also be web-cast and can be accessed on the company's events webpage.

Cautionary Note Regarding Forward-Looking Statements

This news release contains forward-looking statements and forward-looking information (collectively, "forward-looking statements") within the meaning of applicable Canadian and US securities legislation. Information concerning mineral resource/reserve estimates and the economic analysis thereof contained in the feasibility study may also be deemed to be forward-looking statements in that it reflects a prediction of the mineralization that would be encountered, and the results of mining it, if a mineral deposit were developed and mined. The likelihood of future mining at the Livengood Gold Project is subject to a large number of risks and will require achievement of a number of technical, economic and legal objectives, including obtaining necessary mining and construction permits, completion of further feasibility studies, preparation of all necessary engineering for workings and processing facilities as well as receipt of significant additional financing to fund these objectives as well as funding mine construction. Such funding may not be available to the Company on acceptable terms or on any terms at all. All statements, other than statements of historical fact, included herein, including statements with respect to the potential development of the Livengood Gold Project; the price of gold; the ability of the Company to implement cost reduction opportunities or alternative mine plans for the Livengood Gold Project; the timing for completion and anticipated release of additional studies for the Project; the potential for the Company to enter into arrangements with one or more strategic alliance partners and to thereby obtain further finding for the development of the Livengood Gold Project; business and financing plans; business trends and the attractiveness of the Company as a long-term investment are forward-looking statements.
Although the Company believes that such statements are reasonable, it can give no assurance that such expectations will prove to be correct. Forward-looking statements are typically identified by words such as: believe, expect, anticipate, intend, estimate, postulate, proposed, planned, potential and similar expressions, or are those, which, by their nature, refer to future events. The Company cautions investors that any forward-looking statements by the Company are not guarantees of future results or performance, and that actual results may differ materially from those in forward looking statements as a result of various factors, including, but not limited to, specific risks inherent in the mining business as well as general economic and business conditions, variations in the nature, quality and quantity of any mineral deposits that may be located, variations in the market price of any mineral products the Company may produce or plan to produce, including the price of gold, the inability of the Company to enter into arrangements with strategic alliance partners to secure additional funding, or at all, the inability of the Company to obtain any necessary permits, consents or authorizations required for its activities, the inability of the Company to reduce its costs sufficiently while at the same time maintaining essential environmental baseline activities to support the permitting process, the inability of the Company to produce minerals from its properties successfully or profitably, to continue its projected growth, to raise the necessary capital or to be fully able to implement its business strategies, and other risks and uncertainties disclosed in the Company's Annual Information Form (10-K) filed with certain securities commissions in Canada and the Company's annual report on Form 10-K filed with the United States Securities and Exchange Commission (the "SEC"), and other information released by the Company and filed with the appropriate regulatory agencies. All of the Company's Canadian public disclosure filings may be accessed via
www.sedar.com and its United States public disclosure filings may be accessed via www.sec.gov, and readers are urged to review these materials, including the technical reports filed with respect to the Company's Livengood Gold Project.

Cautionary Note Regarding References to Resources and Reserves

National Instrument 43 101 - Standards of Disclosure for Mineral Projects ("NI 43-101") is a rule developed by the Canadian Securities Administrators which establishes standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects. Unless otherwise indicated, all resource and reserve estimates contained in or incorporated by reference in this news release have been prepared in accordance with NI 43-101 and the guidelines set out in the Canadian Institute of Mining, Metallurgy and Petroleum (the "CIM") Standards on Mineral Resource and Mineral Reserves, adopted by the CIM Council on November 27, 2010 (the "CIM Standards") as they may be amended from time to time by the CIM.

United States shareholders are cautioned that the requirements and terminology of NI 43-101 and the CIM Standards differ significantly from the requirements and terminology of the SEC set forth in the SEC's Industry Guide 7 ("SEC Industry Guide 7"). Accordingly, the Company's disclosures regarding mineralization may not be comparable to similar information disclosed by companies subject to SEC Industry Guide 7. Without limiting the foregoing, while the terms "mineral resources", "inferred mineral resources", "indicated mineral resources" and "measured mineral resources" are recognized and required by NI 43-101 and the CIM Standards, they are not recognized by the SEC and are not permitted to be used in documents filed with the SEC by companies subject to SEC Industry Guide 7. Mineral resources which are not mineral reserves do not have demonstrated economic viability, and US investors are cautioned not to assume that all or any part of a mineral resource will ever be converted into reserves. Further, inferred resources have a great amount of uncertainty as to their existence and as to whether they can be mined legally or economically. It cannot be assumed that all or any part of the inferred resources will ever be upgraded to a higher resource category. Under Canadian rules, estimates of inferred mineral resources may not form the basis of a feasibility study or prefeasibility study, except in rare cases. The SEC normally only permits issuers to report mineralization that does not constitute SEC Industry Guide 7 compliant "reserves" as in-place tonnage and grade without reference to unit amounts. The term "contained ounces" is not permitted under the rules of SEC Industry Guide 7. In addition, the NI 43-101 and CIM Standards definition of a "reserve" differs from the definition in SEC Industry Guide 7. In SEC Industry Guide 7, a mineral reserve is defined as a part of a mineral deposit which could be economically and legally extracted or produced at the time the mineral reserve determination is made, and a "final" or "bankable" feasibility study is required to report reserves, the three-year historical price is used in any reserve or cash flow analysis of designated reserves and the primary environmental analysis or report must be filed with the appropriate governmental authority.

This news release is not, and is not to be construed in any way as, an offer to buy or sell securities in the United States.

NR13-07

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