Excelsior Mining Provides Copper Production Update
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NEWS RELEASE
Excelsior Mining Provides Copper Production Update
March 2, 2020
Excelsior Mining Corp. (TSX: MIN) (FSE: 3XS) (OTCQX: EXMGF) ("E xcelsior" or the “Company”)
is pleased to confirm that wellfield optimization at the Gunnis on Copper Project in Southern Arizona is
progressing as planned. Excelsior previously announced some changes to the production wellfield (see
Excelsior news release dated February 4, 2020) in order to impr ove efficiency for long-term production
performance. These changes are expected to be completed in Marc h, 2020, and the Company is
forecasting first copper production in Q2 of this year.
The goal of all the wellfield optimization is to assist in acid breakthrough and continued copper
mobilization. Breakthrough will be achieved when free acid is d etected at designated recovery wells;
thereby maintaining the desired pH level (acidity level) where copper will remain in solution.
Specific optimizations that are being implemented include making the wellfield reversable in terms of fluid
flow. Injection wells are being retrofitted with pumps; thereby, allowing them to be used as recovery wells
when needed. In addition, recovery wells are in the process of being reconfigured to allow for injection.
The current configuration of the wellfield comprises 70-foot spacing between injection and recovery wells.
By making the wellfield reversable, Excelsior will have the opt ion of moving mobilized copper only a
portion of the full distance between the wells before reversing the fluid flow; thereby reducing the effective
distance that the copper must travel before it is recovered. Th is new capacity to move fluids back and
forth (push and pull) is expected to help achieve breakthrough, at which point copper would remain in
solution throughout the production process.
In parallel, infrastructure is being installed that will allow for concentrated acid to be injected into each
well, which will dissolve any reprecipitated copper (copper sul phate) in the area of the pumps, thereby
ensuring effective fluid flow.
Additionally, Excelsior announces the promotion of Roger Baer to the position of Interim CFO. Mr. Baer
is a CPA and has been Excelsior’s Corporate Controller since Ju ly 2018; he brings over 30-years of
financial management and progressive accounting experience with in the mining industry, having held
financial management roles with Alacer Gold, Thompson Creek Met als, Newmont Mining Corp,
Kennecott (Rio Tinto) and Cyprus Amax. Mr. Baer is replacing Ba rry Dahl, who had been Excelsior’s
CFO since August, 2018. Mr. Dahl will be returning to Nevada fo r personal reasons. Commenting on
his departure, Mr. Dahl said, “Although this is a very exciting moment for Excelsior in terms of proximity
to first production, my family and I decided to return to the S tate of Nevada and I will pursue other
opportunities there.” Excelsior thanks Mr. Dahl for his service and wishes him the best of luck.
About Excelsior Mining
Excelsior “The Copper Solution Company ” is a mineral exploration and production company that owns
the Gunnison Copper Project in Cochise County, Arizona. The pro ject is a low cost, environmentally
friendly in-situ recovery copper extraction project that is per mitted to 125 million pounds per year of
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copper cathode production. The Feasibility Study projected an a fter-tax NPV of US$ 807 million and an
IRR of 40% using a US$ 2.75 per pound copper price and a 7.5% discount rate.
Excelsior’s technical work on the Gunnison Copper Project is supervised by Stephen Twyerould, Fellow
of AUSIMM, President & CEO of Excelsior and a Qualified Person as defined by National Instrument 43-
101. Mr. Twyerould has reviewed and approved the technical information contained in this news release.
Additional information about the Gunnison Copper Project can be found in the technical report filed on
SEDAR at www.sedar.com entitled: “Gunnison Copper Project, NI 4 3-101 Technical Report, Feasibility
Study” dated effective December 17, 2016.
For more information on Excelsior, please visit our website at www.excelsiormining.com.
For further information regarding this press release, please contact:
Excelsior Mining Corp.
Concord Place, Suite 300, 2999 North 44th Street, Phoenix, AZ, 85018.
JJ Jennex, Vice President, Corporate Affairs
T: 604 723 1433
www.excelsiormining.com
Cautionary Note Regarding Forward-Looking Information
This news release contains "forward-looking information" concerning anticipated developments and events that may
occur in the future. Forward looking information contained in this news release includes, but is not limited to,
statements with respect to: (i) the results of the Feasibility Study, including operating and capital cost estimates and
the economic benefits from the Gunnison Copper Project; (ii) the schedule for production and first copper cathode
sales; (iii) the success of the wellfield optimization plan; and (iv) the ability to mine the Gunnison Copper Project
using in-situ recovery mining techniques.
In certain cases, forward-looking information can be identif ied by the use of words such as "plans", "expects" or
"does not expect", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates" or "does not anticipate",
or "believes", or variations of such words and phrases or state that certain actions, events or results "may", "could",
"would", "might", "occur" or "be achieved" suggesting fu ture outcomes, or other expectations, beliefs, plans,
objectives, assumptions, intentions or statements about future events or performance. Forward-looking information
contained in this news release is based on certain fa ctors and assumptions regardi ng, among other things, the
estimation of mineral resources and mineral reserves, the realization of resource and reserve estimates, copper
and other metal prices, the timing and amount of future de velopment expenditures, the estimation of initial and
sustaining capital requirements, the estimation of labour and operating costs, the progress of construction activities,
receipt of and compliance with necessary regulatory approvals, the estimation of insurance coverage, and
assumptions with respect to currency fluctuations, environm ental risks, title disputes or claims, and other similar
matters. While the Company considers these assumptions to be reasonable based on information currently
available to it, they may prove to be incorrect.
Forward looking information involves known and unknown risks, uncertainties and other factors which may cause
the actual results, performance or achievements of the Company to be materially different from any future results,
performance or achievements expressed or implied by the forward-looking information. Such factors include risks
inherent in the construction of mineral deposits, including risks relating to changes in project parameters as plans
continue to be redefined including the possibility that mining operations may not commence at the Gunnison Copper
Project, risks relating to variations in mineral resources and reserves, grade or recovery rates, risks relating to the
ability to access infrastructure, risks relating to changes in copper and other commodity prices and the worldwide
demand for and supply of copper and related products, ri sks related to increased competition in the market for
copper and related products, risks related to current global financial conditions, uncertainties inherent in the
estimation of mineral resources, acce ss and supply risks, reliance on key pers onnel, operational risks inherent in
the conduct of mining activities, including the risk of acci dents, labour disputes, increases in capital and operating
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costs and the risk of delays or increased costs that might be encountered during the construction process, regulatory
risks, financing, capitalization and liquidi ty risks, risks related to disputes concerning property titles and interests,
environmental risks and the additional risks identified in the “Risk Factors” section of the Company’s reports and
filings with applicable Canadian securities regulators.
Although the Company has attempted to identify important factors that could cause actual actions, events or results
to differ materially from those described in forward-look ing information, there may be other factors that cause
actions, events or results not to be as anticipated, esti mated or intended. Accordingl y, readers should not place
undue reliance on forward-looking information. The forward-looking information is made as of the date of this news
release. Except as required by applicable securities laws, the Company does not undertake any obligation to
publicly update or revise any forward-looking information.