Pumpkin Hollow Copper
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The Pumpkin Hollow underground copper mine in Nevada is a permitted, restart-stage asset with 2 billion pounds of copper resources, established infrastructure, and strong community support, and is positioned to deliver long-life, reliable North American production.
Investment Highlights

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Project Overview
In late 2024, Kinterra’s Fund I acquired the Pumpkin Hollow underground copper mine through its portfolio company, Southwest Critical Materials LLC, via a Chapter 11 bankruptcy process. The project contains over 2.1 billion pounds of contained copper resources (1.5Bn M&I and 0.6Bn Inf), supporting an approximate 15 year mine life with an average annual production of 54 million pounds. At the time of acquisition, the asset had over $800 million of capital investment and a complete fleet of mining equipment.
The site is further supported by ancillary facilities, including core sheds, offices, and administration complexes. Pumpkin Hollow combines relatively low capital intensity with straightforward metallurgical recovery using conventional flotation, offering a clear competitive advantage over comparable projects. Backed by strong community relationships, a skilled workforce, and robust stakeholder engagement, the project is currently being restarted, positioning it to become a long-life, reliable source of copper production in North America.
Strategic Holdings
Our strategic holdings represent critical material projects and associated infrastructure that are essential to the modern economy. We invest in assets with scale, resilience, and clear development pathways, working alongside strong local partners to unlock long-term value.

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In 2023, Kinterra’s Fund I secured a majority stake in White Pine Copper LLC, positioning the firm at the forefront of one of the largest undeveloped copper projects in the United States. Building on a legacy of historic production, the White Pine North Project combines scale, existing infrastructure, and strong community roots to advance a new chapter in Michigan’s Upper Peninsula mining history.

Kinterra’s Fund I strengthened its U.S. copper portfolio in late 2024 with the acquisition of the Southwest Open Pit Project, one of the nation’s most advanced, fully permitted undeveloped copper assets. Positioned for long-term growth and strategic importance, the project combines scale, strong economics, and a clear path toward construction.