NOBLE PLAINS URANIUM CLOSES ON DUCK CREEK PROJECT IN THE HEART OF POWDER RIVER BASIN Exploration Target Range Supported by New NI 43-101 Technical Report
NOBLE PLAINS URANIUM CLOSES ON DUCK CREEK PROJECT IN THE HEART OF
POWDER RIVER BASIN
Exploration Target Range Supported by New NI 43-101 Technical Report
August 1 4, 2025 – Vancouver, British Columbia – Noble Plains Uranium Corp. (TSX -V: NOBL, OTCQB:
NBLXF, FSE: INE0) (“Noble Plains” or the “ Company”) is pleased to announce that it has closed on the
property option agreement to acquire an 80% interest in the Duck Creek Project (“Duck Creek Property”,
“Duck Creek ”, the “ Project”, or the “ Property”), a strategically located brownfield uranium asset in
Wyoming’s highly productive Powder River Basin (the “PRB”).
The option closing coincides with a newly completed National Instrument 43-101 (“NI 43-101”) technical
report prepared for UNXE238 Corp. (the “Optionor”) by independent firm Western Water Consultants, Inc
d/b/a WWC Engineering of Sheridan, Wyoming (“WWC”). The report highlights an Exploration Target of
between 2.37 million tons at 0.03% U₃O₈ and 5.45 million tons at a grade of 0.05% U₃O₈ based on historical
drilling. The potential quantity and grade is conceptual in nature, that there has been insufficient
exploration to define a mineral resource and that it is uncertain if further exploration will result in the
target being delineated as a mineral resource.
“This is a further example of our team executing on its strategy to identify high-quality brownfield assets
in the best U.S. uranium districts, use strong historic data to accelerate de -risking, and advance them
quickly toward compliant resources,” said Drew Zimmerman, President of Noble Plains Uranium. “With
Duck Creek no w secured along with a new NI 43 -101, we are positioned to rapidly deliver meaningful
pounds in the ground, building real leverage for our shareholders as the uranium market continues to
strengthen.”
Duck Creek Project Highlights
• Scale & Location: 4,133 acres (6.5 sq. mi.) of mineral rights, surrounded by major uranium projects
and production facilities owned by Cameco, Uranium Energy Corp., Global Uranium and
Enrichment, and GTI Energy,
• Extensive Historical Work: Over 4,000 drill holes, including a 3 -mile trend of shallow roll -front
uranium mineralization,
• Historic Drill Intercepts: include 8.9 feet grading 0.75% U₃O₈ and 13.9 feet of 0.47% U₃O₈,
• Historic Production: Past open-pit mining evident along and beyond the mineralized trend,
• Significant Exploration Potential: untested deeper Fort Union Formation.
In the Heart of a Growing Production Corridor
Located in one of the most prolific in-situ recovery (“ISR”) uranium districts in the United States, Duck
Creek is directly surrounded by major deposits and production facilities owned by Cameco Corporation,
Uranium Energy Corp., and GTI Energy Limited (see Figure 1). The Project’s extensive historical database,
favourable geology, and proximity to existing infrastructure present a rare opportunity to advance a
uranium project in a proven production hub.
Figure 1: Duck Creek Project Surrounded by resource and production projects
Note: source of resource numbers in Figure 1: Allemand-Ross, Barge, and Ludeman projects, from 2022 -
09 technical report Exhibit 96.1. Smith Ranch Highland, from Cameco website. Lo Herma, from company
website. Technical and scientific information disclosed from neighbouring properties does not necessarily
apply to the Duck Creek Project.
“From a geological perspective, Duck Creek has all the hallmarks of a highly attractive ISR project,” said
Paul Cowley, CEO of Noble Plains Uranium. “It is in a proven roll-front uranium district, with drill spacing
and mineralization continuity that provide a strong basis for confirmation and expansion. We plan to
initiate a focused drilling campaign this fall. Design and magnitude of the drill program is in progress with
a drill permit application at an advanced stage.”
Duck Creek - A Strong Technical Foundation
The Project covers 4,133 acres (6.5 mi²) of mineral rights, including four State of Wyoming mineral leases
(2,560 acres) and 78 lode mining claims (1,573 acres) . The Project hosts a 3 -mile-long corridor of high -
density drilling completed by Kerr-McGee Nuclear Corporation in the 1970s. A total of 4,068 historical drill
holes outline a consistent, shallow roll-front uranium system within the Eocene-aged Wasatch Formation,
with mineralization occurring from less than 50 feet to 260 feet below surface (see Figure 2). Highlights of
the historical drill intercepts include 8.9 feet grading 0.75% U₃O₈ and 13.9 feet of 0.47% U₃O₈ . Local
historic open-pit mining is evident within and beyond the mineralized trend shown in Figure 2.
The technical report was completed for UNXE238 Corp. by independent WWC, dated August 13, 2025,
entitled “NI 43-101 Technical Report Duck Creek Uranium Project” (“Technical Report”) which states that
the Project potentially contains an Exploration Target summarized in Table 1. The Technical Report will be
Sedar filed today and made available on the Company website.
Table 1. Duck Creek Uranium Project Exploration Target
Upper Range
Estimate
Methodology
Average Grade
(% U3O8)
Median GT Sum
(% U3O8-ft) Area (ft2) Tons (000s)
Mineral Outline 0.05 0.598 5,895,866 4,241
Extended Trend 0.05 - - 1,205
Total 5,446
Lower Range
Estimate
Methodology
First Quartile
Grade
(% U3O8)
Minimum GT Sum
(% U3O8-ft) Area (ft2) Tons (000s)
Mineral Outline 0.03 0.201 5,895,866 2,373
Total 2,373
The potential quantity and grade at the Project are conceptual in nature , that it is uncertain if further
exploration will result in the target being delineated as a mineral resource and there is insufficient data to
estimate a mineral resource. Drill holes with intercepts with Grade -Thickness (GT) sum less than 0.2 % -ft
were excluded. A bulk density of 16.6 ft3/ton was used. The average thickness of each intercept with GT
greater than 0.2%-ft within the mineral outline is 7 ft. The total number of intercepts within the mineral
outline area is 1,317 and the average cumulative intercept thickness per drillhole is 11.8 ft.
Figure 2: 3-mile-long trend of high-density historic drilling and historic production areas
Untested Upside in the Fort Union Formation
The historical drilling at Duck Creek focused exclusively on shallow mineralization in the Wasatch
Formation. The deeper Fort Union Formation remains completely untested on the property. This lower
unit hosts the bulk of resources at several surrounding ISR projects in the Powder River Basin, including
those operated by Cameco and Uranium Energy Corp. The absence of historic drilling into the Fort Union
at Duck Creek presents a significant exploration upside to expand beyond the Wasatch mineralized zones.
Strategic Context
The acquisition of Duck Creek significantly strengthens Noble Plains’ Wyoming portfolio, building on the
Company’s recent acquisition of Shirley Central and expansion of Shirley East in the Shirley Basin. Wyoming
has produced over 238 million pounds of uranium since the 1950s, with the Powder River Basin and Shirley
Basin’s representing key districts in that legacy of production. ISR is now the dominant extraction method
in Wyoming overall, because it allows for faster permitting, minimal surface disturbance, and lower capital
and operating costs.
The Transaction
Further to the Company’s June 19, 2025 news release announcing the execution of a property option
agreement, between the Company, UNXE238 Corp. , and Drakensberg Resources LLC, a wholly owned
subsidiary of the Company, the Company has closed the first stage of its option to acquire up to an 80%
interest in the Duck Creek Property by issuing 1,250,000 common shares and paying US$250,000 to the
Optionor. The common shares issued are subject to a four -month hold period in accordance with
applicable securities laws . The remaining share issuances and cash payments are as disclosed in the
Company’s June 19, 2025 news release. The Duck Creek Property option transaction was accepted by the
TSX Venture Exchange as an expedited transaction. UNXE238 Corp. has a Surface Access Agreement with
a local rancher.
About Noble Plains Uranium Corp.
Noble Plains Uranium (TSX-V: NOBL) is focused on acquiring and advancing U.S. -based uranium projects
amenable to In-Situ Recovery (ISR)—the most capital-efficient and environmentally responsible method
of uranium extraction. The Company targets historically explored, geologically robust projects in uranium-
friendly jurisdictions with the goal of rapidly delineating NI 43 -101 resources and building out a pipeline
of ISR-development opportunities.
On Behalf of the Board of Directors,
“Paul Cowley”, CEO
“Drew Zimmerman”, President
For further information, please contact: Drew Zimmerman: (778) 686-0973
Website: www.nobleplains.com
Technical disclosure of the Technical Report and Exploration Target estimate in this news release has been
reviewed and approved by Christopher McDowell, P .G., Project Manager at WWC Engineering, a Qualified
Person as defined by National Instrument 43-101.
Technical disclosure, excluding the Exploration Target estimate in this news release, has been reviewed and
approved by Bradley Parkes, P .Geo., VP Exploration and Director of Noble Plains Uranium Corp., a Qualified
Person as defined in National Instrument 43-101, who has read and approved the technical content of this
news release.
Cautionary Statements Regarding Forward-Looking Information
This news release contains certain “forward -looking information” and “forward -looking statements”
(collectively “forward -looking statements”) within the meaning of applicable securities legislation. All
statements, other than statements of historical fact, included herein, without limitation, statements
relating to the future operations and activities of Noble Plains, are forward-looking statements. Forward-
looking statements are frequently, but not always, identified by words such as “expects”, “anticipates”,
“believes”, “intends”, “estimates”, “potential”, “possible”, and similar expressions, or statements that
events, conditions, or results “will”, “may”, “could”, or “should” occur or be achieved. Forward -looking
statements in this news release relate to, among other things, the acquisition of an 80% interest in the
Duck Creek Property, the merits of the Project, including potential mineralization therein, completion of an
NI 43 -101 compliant technical report on the Property, and the planned 2025 exploration program ,
including timing, scope and objectives, and the Company’s ability to advance the Project towards a NI 43-
101 compliant resource estimate, the potential of the Duck Creek Project to become the Company’s flagship
asset, the expected strengthening of the uranium market and the resulting impact on shareholder value .
There can be no assurance that such statements will prove to be accurate, and actual results and future
events could differ materially from those anticipate d in such statements. Forward -looking statements
reflect beliefs, opinions and projections on the date the statements are made and are based upon a number
of assumptions and estimates that, while considered reasonable by Noble Plains, are inherently subject to
significant business, economic, competitive, political and social uncertainties and contingencies. Many
factors, both known and unknown, could cause actual results, performance or achievements to be
materially different from the results, performance or achievements that are or may be expressed or implied
by such forward-looking statements and the parties have made assumptions and estimates based on or
related to many of these factors. Such factors include, without limitation, the accuracy of historical drilling
and other historical data, the ability to confirm historical results through exploration, the Company’s ability
to obtain necessary permits and approvals in a timely manner, the availability of qualified personnel,
equipment and services, the ability of the Company to obtain TSX Venture Exchange approval, the ability
of the Company to complete proposed exploration work, the results of exploration, continued availability
of capital, and changes in general economic, market and business conditions. Readers should not place
undue reliance on the forward -looking statements and information contained in this news release
concerning these items. Readers are urged to refer to the Company’s filings on SEDAR+
at www.sedarplus.com for a more complete discussion of such risk factors and their potential effects.
Noble Plains does not assume any obligation to update forward -looking statements should beliefs,
opinions, projections, or other factors, change, except as required by applicable securities laws.
Neither the TSX Venture Exchange nor its Regulations Services Provider (as that term is defined in the
policies of the TSX Venture Exchange) accept responsibility for the adequacy or accuracy of this release.