Denison Announces Filing of Technical Report FOR Wheeler River
Denison Mines Corp.
1100 – 40 University Ave
Toronto, ON M5J 1T1
www.denisonmines.com
@DenisonMinesCo
PRESS RELEASE
DENISON ANNOUNCES FILING OF TECHNICAL REPORT
FOR WHEELER RIVER
Toronto, ON – March 16, 2018 Denison Mines Corp. (“Denison” or the “Company”) (D ML: TSX, DNN:
NYSE MKT) today announces that it filed a technical report under Canadian Securities Administrators'
National Instrument 43-101 Standard of Disclosure for Mineral Projects for its 63.3% owned Wheeler River
Project in Saskatchewan titled "Technical Report wi th an Updated Mineral Resource Estimate for the
Wheeler River Property, Northern Saskatchewan, Cana da" dated March 15, 2018 with an effective date of
March 9, 2018.
The technical report is posted on the Company's web site at www.denisonmines.com and is available under
its profile on SEDAR at www.sedar.com and on EDGAR at www.sec.gov/edgar.shtml.
This report supports the disclosure made by the Com pany in its news release dated January 31, 2018,
"Denison announces 88% increase in indicated resour ces at Wheeler River with updated mineral resource
estimate for the Gryphon deposit” (the "News Releas e") and there are no material differences in the
technical report from the information disclosed in the News Release.
As outlined in the News Release, the updated minera l resource estimate for Wheeler River is highlighte d
by a significant increase in the estimated mineral resources for the property’s basement-hosted Grypho n
uranium deposit and an overall 88% increase in the Indicated Mineral Resources estimated for the Wheel er
River project.
Resource Update Highlights:
• The Gryphon deposit is estimated to contain, above a cut-off grade of 0.2% U 3O8, 61.9 million
pounds of U 3O8 (1,643,000 tonnes at 1.71% U 3O8) in Indicated Mineral Resources, plus 1.9 million
pounds of U3O8 (73,000 tonnes at 1.18% U3O8) in Inferred Mineral Resources.
• Wheeler River is also host to the Phoenix deposit, which is estimated to include Indicated Mineral
Resources of 70.2 million pounds of U 3O8 above a cut-off grade of 0.8% U 3O8 (166,000 tonnes at
19.1% U3O8).
• With this update to the resources estimated for th e Gryphon deposit, the combined Indicated
Mineral Resources estimated for Wheeler River have increased by 88% to 132.1 million pounds of
U3O8 (1,809,000 tonnes at 3.3% U 3O8), which will be used to support the Pre-Feasibilit y Study
("PFS") initiated for the project in July 2016 and expected to be completed during 2018.
Qualified Persons
The technical report was authored by Mr. Mark Mathi sen, C.P.G. of Roscoe Postle Associates Inc. and Ke n
Reipas, P.Eng of SRK Consulting (Canada) Inc., inde pendent Qualified Persons in accordance with the
requirements of NI 43-101.
The technical information contained in this release has been reviewed and approved by Mr. Dale Verran,
MSc, P.Geo, Pr.Sci.Nat., Denison's Vice President, Exploration, who is a Qualified Person in accordanc e
with the requirements of NI 43-101.
About Denison
Denison is a uranium exploration and development co mpany with interests focused in the Athabasca Basin
region of northern Saskatchewan, Canada. In additio n to its 63.3% owned Wheeler River project, which
hosts the high-grade Phoenix and Gryphon uranium de posits, Denison's exploration portfolio consists of
numerous projects covering approximately 351,000 he ctares in the Athabasca Basin region, including
approximately 316,000 hectares in the infrastructur e rich eastern portion of the Athabasca Basin. Deni son's
interests in Saskatchewan also include a 22.5% owne rship interest in the McClean Lake joint venture
(“MLJV”), which includes several uranium deposits and the McClean Lake uranium mill, which is currentl y
processing ore from the Cigar Lake mine under a tol l milling agreement, plus a 25.17% interest in the
Midwest and Midwest A deposits, and a 64.22% intere st in the J Zone deposit and Huskie discovery on th e
Waterbury Lake property. Each of Midwest, Midwest A , J Zone and Huskie are located within 20 kilometre s
of the McClean Lake mill.
Denison is also engaged in mine decommissioning and environmental services through its Denison
Environmental Services division and is the manager of Uranium Participation Corp., a publicly traded
company which invests in uranium oxide and uranium hexafluoride.
For more information, please contact
David Cates (416) 979-1991 ext. 362
President and Chief Executive Officer
Sophia Shane (604) 689 -7842
Investor Relations
Follow Denison on Twitter @DenisonMinesCo
Cautionary Statement Regarding Forward-Looking Statements
Certain information contained in this press release constitutes “forward-looking information”, within the meaning of the
United States Private Securities Litigation Reform Act of 1995 and similar Canadian legislation concer ning the
business, operations and financial performance and condition of Denison.
Generally, these forward-looking statements can be identified by the use of forward-looking terminolog y such as
“plans”, “expects”, “budget”, “scheduled”, “estimates”, “forecasts”, “intends”, “anticipates”, or “believes”, or the negatives
and / or variations of such words and phrases, or s tate that certain actions, events or results “may”, “could”, “would”,
“might” or “will be taken”, “occur”, “be achieved” or “has the potential to”. In particular, this pres s release contains
forward-looking information pertaining to the resul ts of, and estimates, assumptions and projections p rovided in, the
technical report, and expectations regarding the co mpletion of a PFS. Statements relating to "mineral resources" are
deemed to be forward-looking information, as they i nvolve the implied assessment, based on certain est imates and
assumptions that the mineral resources described can be profitably produced in the future.
Forward looking statements are based on the opinion s and estimates of management as of the date such s tatements
are made, and they are subject to known and unknown risks, uncertainties and other factors that may ca use the actual
results, level of activity, performance or achievem ents of Denison to be materially different from tho se expressed or
implied by such forward-looking statements. Denison believes that the expectations reflected in this f orward-looking
information are reasonable but there can be no assu rance that such statements will prove to be accurat e and may
differ materially from those anticipated in this fo rward looking information. For a discussion in resp ect of risks and other
factors that could influence forward-looking events , please refer to the “Risk Factors” in Denison’s Annual Information
Form dated March 23, 2017 available under its profi le at www.sedar.com and its Form 40-F available at
www.sec.gov/edgar.shtml . These factors are not, and should not be construed as being exhaustive.
Accordingly, readers should not place undue relianc e on forward-looking statements. The forward-lookin g information
contained in this press release is expressly qualif ied by this cautionary statement. Any forward-looki ng information and
the assumptions made with respect thereto speaks on ly as of the date of this press release. Denison d oes not
undertake any obligation to publicly update or revise any forward-looking information after the date of this press release
to conform such information to actual results or to changes in its expectations except as otherwise re quired by
applicable legislation.
Cautionary Note to United States Investors Concerni ng Estimates of Measured, Indicated and Inferred Mi neral
Resources: This press release may use the terms “measured”, “i ndicated” and “inferred” mineral resources. United
States investors are advised that while such terms are recognized and required by Canadian regulations , the United
States Securities and Exchange Commission does not recognize them. “Inferred mineral resources” have a great
amount of uncertainty as to their existence, and as to their economic and legal feasibility. It cannot be assumed that all
or any part of an inferred mineral resource will ever be upgraded to a higher category. Under Canadian rules, estimates
of inferred mineral resources may not form the basi s of feasibility or other economic studies. United States investors
are cautioned not to assume that all or any part of measured or indicated mineral resources will ever be
converted into mineral reserves. United States inve stors are also cautioned not to assume that all or any part
of an inferred mineral resource exists, or is economically or legally mineable.