US Copper Stakes Additional Claims to Accommodate Future Surface Facilities at the Moonlight-Superior Copper Project Project consolidated land package now encompasses 7,053 acres with this addition of 54 new claims. New claims expected to provide sufficient land for all facilities in a future mi
US Copper Stakes Additional Claims to Accommodate Future Surface
Facilities at the Moonlight-Superior Copper Project
Project consolidated land package now encompasses 7,053 acres with this addition of
54 new claims.
New claims expected to provide sufficient land for all facilities in a future mine site.
TORONTO, CANADA, December 15, 2025 – US Copper Corp., (“ US Copper ” or the
“Company”) (TSX-V: USCU, FSE: C73) is pleased to announce that it has staked 54 new federal
claims totalling 1,104 acres adjacent to its existing federal a nd patented claims at its Moonlight-
Superior Mining property, located in Plumas County, California.
The new claims will increase the total land package at Moonlight Superior to 7,053 acres. These
new claims are intended to provide the additional acreage necessary to support the anticipated
development and operations plan for the Moonlight-Superior Copper Project, including plant
infrastructure, water treatment and waste rock stockpiles.
Stephen Dunn, CEO of US Copper, commented, “We are pleased to have secured these additional
claims for the future mine surfa ce facilities – an essential component to our overall mine plan as
we prepare forfor our Pre Feasibility Study t fall 2026 and and the launc h of the permitting
process. The Moonlight-Superior Mining Project would become a cornerstone of economic
growth, prosperity, and community development in the Plumas County region for more than two
decades, providing career opportunities and family-supporting employment for years to come.”
“Copper is a key element in a wide range of energy technologies and is designated as a Critical
Mineral by the government the United States.The re cent National Security Strategy released on
December 4 by the Whitehouse states
“The United States must never be dependent on any outside power for core
components—from raw materials to parts to finished products—
necessary to the nation’s defense or economy. We must re-secure our
own independent and reliable access to the goods we need to defend
ourselves and preserve our way of life. This will require expanding
American access to critical minerals and materials…”
Moonlight would become an integr al supplier of copper metal to the U.S. domestic market with
average annual production of 60 million pounds of copper and 1.7 billion pounds over the life of
mine. Copper is a critical material for an extensive range of important applications ranging from
renewable power generation to elec tric vehicles. As such, it is v ital that the US has a strong and
viable domestic source of copper supply.”
The Company would also like to report that the Metallurgical st udies previously announced (see
news release of September 4, 2025) have begun and are scheduled to wrap up by April with partial
results to be released beginning in February, 2026. These resul ts will be used to design a drill
program to provide additional metallurgical samples necessary f or the planned Pre Feasibility
Study.
Note on Peter Epstein who?
About US Copper Corp.
US Copper controls approximately 10 square miles of patented an d unpatented federal mining
claims in the Light’s Creek Copper District in Plumas County, NE California; essentially, the entire
District. The District contains substantial copper sulfide and copper oxide resources in three
company-owned deposits – Moonlight, Superior and Engels, as well as several partially tested and
untested exploration targets.
The Superior and Engels Mines operated from about 1915 to 1930 producing over 161 million
pounds of copper with silver and go ld credits. from over 4 mill ion tons of rock containing 2.2%
copper
The Moonlight deposit was discove red by Placer Amex during the 1960s and a resource was
calculated after the drilling of over 400 holes. A development decision was made but then put on
hold in 1972 when copper prices were weak.
US Copper has owned the Moonlight-Superior Project since 2013 a nd has advanced it with three
different drill programs and a number of engineering studies.
US Copper recently reported an after-tax NPV of US$1.075 billio n in a Preliminary Economic
Assessment (“PEA”) prepared by Global Resource Engineering Ltd (“GRE”) dated Dec 16, 2024
with a life of mine production of 1.8 billion pounds of copper (See news release dated Jan 6, 2025).
GRE calculated a new mineral resource for the purposes of this PEA that included all recent drill
programs on the property. This resource is summarized below:
Notes:
1. The effective date of the Mineral Resource is December 16, 2024.
2. The Qualified Person for the Mineral Resource Estimate is Terre Lane of GRE.
3. Mineral resources are reported at a 0.16% Cu cutoff for oxide a nd transition material and at a $10.45 NSR cutoff for sulfide
material. The oxide and transition cutoff is calculated based o n a long-term copper price of US$4.00/lb; assumed combined
operating costs of US$7.50/ton (process and G&A); metallurgical recovery of 75% for copper. The sulfide cutoff is calculated
as the breakeven NSR, which is equal to the combined process and G&A costs for the sulfide material.
Further details of this Resource, and the Preliminary Economic Assessment NI43-101 Technical
Report on the Moonlight-Superior Project, Plumas County, California, USA with an effective date
Mass
(million
tons)
Total 402.83 0.31 2,533,771 1.85 21,692,531 0.012 140,042
Total 64.59 0.31 394,199 0.77 1,448,154 0.005 9,440
Table 1: Moonlight Superior Mineral Resource Estimate
Ag Grade
(ppm)
Ag Content
(troy oz.)
Au Grade
(ppm)
Au
Content
(troy oz.)
Indicated
Inferred
Cu Grade
(%)
Cu
Content
('000 lb)
of December 16, 2024 can be found on Sedar+ at sedarplus.ca or at the Company’s website at
www.uscoppercorp.com.
The PEA is preliminary in nature and includes Inferred Mineral Resources that are considered too
speculative geologically to have the economic considerations applied to them that would enable
them to be categorized as Mineral Reserves under CIM Definition Standards. Readers are advised
that there is no certainty that the results projected in this preliminary economic assessment will be
realized.
For Further Information Contact:
Mr. Stephen Dunn, President, CEO and Director, US Copper Corp. (416) 361-2827 or email
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in
the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of
this press release.
This press release contains forward-looking statements within the meaning of applicable Canadian
and U.S. securities laws and regulations, including statements regarding the future activities of
the Company. Forward-looking statements refle ct the current beliefs and expectations of
management and are identified by the use of wo rds including “will”, “hopes”, “anticipates”,
“expected to”, “plans”, “planned” and other similar words. Actual results may differ
significantly. The achievement of the results expressed in forward-looking statements is subject to
a number of risks, including those described in the Company’s management discussion and
analysis as filed with the Canadi an securities regulatory author ities which are available at
www.sedarplus.ca. Investors are cautioned not to place undue reliance upon forward-looking
statements.