The "Army Organic Industrial Base Mineral Partnerships Act of 2026" amends Title 10, United States Code, to permit the Army to establish cooperative partnerships with non-Army entities for mineral extraction operations at its organic industrial base facilities. These operations encompass the recovery, processing, or handling of strategic or critical minerals, utilizing land, facilities, waste streams, or byproducts under Army control. A key provision ensures that non-Army entities undertaking these operations are fully responsible for complying with all applicable Federal, State, and local environmental laws , including the National Environmental Policy Act and the Clean Air Act. They must also indemnify the United States for any environmental liability, including contamination discovered post-termination or migrating off-site, and provide adequate financial assurance like performance bonds or insurance. The Army will receive reasonable consideration for these partnerships, which may include cash payments, in-kind contributions such as minerals or processed materials, or infrastructure improvements. Cash received can be retained and used by the Army for the operation, maintenance, modernization, or environmental remediation of its industrial facilities, or credited to the Army Working Capital Fund for capital investments. The bill explicitly states that the requirements of the Mineral Leasing Act for Acquired Lands do not apply to these authorized mineral extraction activities. Furthermore, the legislation clarifies that the Army itself will not directly engage in mineral extraction. It also requires the Secretary of the Army to submit annual reports to Congress detailing the number of such contracts and the types of strategic or critical minerals involved.