Denison Reports Extension of Cornerstone Contract FOR Environmental Services Business
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Denison Mines Corp.
1100 – 40 University Ave
Toronto, ON M5J 1T1
www.denisonmines.com
@DenisonMinesCo
PRESS RELEASE
DENISON REPORTS EXTENSION OF CORNERSTONE CONTRACT
FOR ENVIRONMENTAL SERVICES BUSINESS
Toronto, ON – July 26, 2017 Denison Mines Corp. (“Denison” or the “Company”) (DML: TSX, DNN: NYSE
MKT) is pleased to announce that the Company’s envi ronmental services business, operating under the
brand Denison Environmental Services (“DES”), has entered into a new two year services agreement with
Rio Algom Limited, which is a subsidiary of BHP Bil liton Limited (“BHP”). The agreement is in relation to the
management and operation of several of BHP’s decommissioned mine sites in Ontario and Quebec.
David Cates, President and CEO of Denison commented , “Denison’s environmental services business is
often over looked in favour of our ambitious uraniu m exploration and development activities in the
Athabasca Basin region in northern Saskatchewan. O ur DES team is based in Elliot Lake, Ontario and ha s
been providing services to BHP for over a decade. B HP is a cornerstone client for DES, and it speaks
volumes to the quality of our people and services t o have a repeat customer of this magnitude. We have a
dedicated team of environmental scientists, profess ionals, and site operators serving various clients in the
Yukon, Ontario and Quebec. Our people are committe d to serving our clients, the community, and the
environment, and are focused on building long lasti ng partnerships – and in that regard we are very
pleased to have the opportunity to continue to serv e BHP for a further two years, and we are looking
forward to delivering the highest quality of service possible.”
Highlights of BHP Contract Extension
Under the terms of the BHP contract, DES will be re sponsible for the management and operation of nine
historic mine sites in Ontario and two in Quebec fr om July 1, 2017 to June 30, 2019. In this capacity, DES’s
responsibilities are expected to include the following:
• Operation of six water treatment plants and eight tailings management facilities;
• Environmental monitoring and compliance, data mana gement, and regulatory reporting;
• Maintenance of roads, dams and electrical infrastr ucture;
• Site management, including health and safety, proc urement, logistics, and budgeting activities; and
• Project management and execution of various projec ts, including infrastructure upgrades and
replacements, engineering and environmental programs, as well as water management initiatives.
With BHP as a cornerstone contract for DES in 2016, DES reported segment revenues of over USD$7.8
million, resulting in net income from Denison’s env ironmental services business of over USD$1.1 millio n
(CAD$1.4 million).
Denison Environmental Services
DES was formed in 1997 to provide mine decommission ing services to industry and government following
the closure of Denison’s own uranium mining operations in Elliot Lake, Ontario. DES draws on a wealth of
experience acquired from operating its own decommis sioned sites and from the experiences of its skille d
staff of environmental scientists and professionals , who have held various positions with leading mini ng
companies and consulting firms throughout Canada.
In addition to decommissioning and care and mainten ance projects, DES also provides consulting service s
for mining projects in the areas of mine site devel opment, closure planning and cost evaluation,
environmental permitting, environmental monitoring and data management, electrical contracting, and
project management.
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About Denison
Denison is a uranium exploration and development co mpany with interests focused in the Athabasca Basin
region of northern Saskatchewan. Including its 60% owned Wheeler River project, which hosts the high-
grade Phoenix and Gryphon uranium deposits, Denison 's exploration portfolio consists of numerous
projects covering over 330,000 hectares in the infr astructure rich eastern Athabasca Basin. Denison's
interests in Saskatchewan also include a 22.5% owne rship interest in the McClean Lake joint venture,
which includes several uranium deposits and the McC lean Lake uranium mill, which is currently processi ng
ore from the Cigar Lake mine under a toll milling a greement, plus a 25.17% interest in the Midwest dep osit
and a 63.63% interest in the J Zone deposit on the Waterbury Lake property. Both the Midwest and J Zon e
deposits are located within 20 kilometres 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
Janet Lowe
General Manager of DES (705) 848-9191 ext. 229
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 an d similar Canadian legislation concerning the busin ess, 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 state 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 press release contains forward-looking information pertai ning to the material terms of the
services agreement and Denison’s ability to derive the anticipated benefits thereof.
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, uncert ainties and other factors that may cause the actual results, level of activity,
performance or achievements of Denison to be materi ally different from those expressed or implied by f orward-looking statements.
Denison believes that the expectations reflected in this forward-looking information are reasonable but no assurance can be given that
these expectations will prove to be accurate and ma y differ materially from those anticipated in this forward looking information. For a
discussion in respect of risks and other factors th at could influence forward-looking events, please r efer to the factors discussed in
Denison's Annual Information Form dated March 23, 2017 under the heading "Risk Factors". These factors are not, and should not be
construed as being exhaustive. Accordingly, readers should not place undue reliance on forward-looking statements.
The forward-looking information contained in this p ress release is expressly qualified by this caution ary statement. Any forward-
looking information and the assumptions made with respect thereto speaks only as of the date of this press release. Denison does not
undertake any obligation to publicly update or revi se any forward-looking information after the date o f this press release to conform
such information to actual results or to changes in Denison's expectations except as otherwise required by applicable legislation.