Strategic Materials
Policy Tracker
← Projects
USUnited States

INL antimony sulfide modular pilot plant

Idaho Falls, Idaho

prj-us-inl-antimony-pilot

Download investigation JSONSources & citationsCorpus revised 3 Nov 2026

What does the record establish?

Prototype processing capability using samples from the Stibnite Gold Project; separate from the mine project itself.

Financial standing

1 directly linked instruments. Recorded financial states: Partially disbursed. A commitment, a payment and a project cost remain separate.

Inspect instruments and terms

Legal and policy context

1 parent policy records; 0 project designations. Designation confers standing, not finance. Material and stage overlaps with controls do not establish a restriction on this project.

Read the policy records

Industrial evidence

No source-reviewed project milestone is published in this corpus. Financing records may still contain attributed activity reports; this gap does not establish inactivity.

See evidence gaps

Financial evidence and chronology

Each instrument keeps its own financial history. These dates describe financial states, not construction or production. Amounts are the current recorded terms, not historical amounts at every date below.

Grant · U.S. Department of Defense / U.S. Army through the Defense Ordnance Technology ConsortiumThe current estimated amount is $27.1 million · Partially disbursed · Commitment
Provider organizations
U.S. Department of Defense
Recipient
Perpetua Resources Idaho, Inc.Perpetua Resources Idaho, Inc.
Legal authority as stated
Prototype Other Transaction authority

  1. · Contracted

    The OTIA was awarded under Prototype Other Transaction authority on 18 August 2023.

    Perpetua Resources Corp. / U.S. Securities and Exchange Commission (EDGAR)

  2. Exact status date not stated · Partially disbursed

    The filing reports grant income and cash reimbursements under the still-active OTIA; the full current estimated amount had not been paid.

    Perpetua Resources Corp. / U.S. Securities and Exchange Commission (EDGAR)

No additional structured terms are recorded. See the full instrument for its evidence and qualifications.

The current estimate incorporates the original up-to-$15.5M 2023 OTIA plus later additions. The amount remains subject to adjustment as scope, costs and budget change.

Full financial instrument, conditions and field-level evidence

Capital stack

One layer per value role. Only committed public money, and joint-vehicle money apart from it, is summed, per currency; everything else is listed. There is no total across layers.

Public commitments

1 row · summed per currency

Committed to a recipient by a government or public enterprise, at the status each row states. A contracted, partially disbursed or disbursed row is binding because an agreement is executed; payment is tracked separately by status. A contracted row need not mean funds are obligated or paid, and a partially disbursed row is not fully paid. Summed per currency and per instrument, never across either; a part is never added to its package.

USD

Grant1 row

Binding

Approximately
27.1 million

1 counted

US18 Aug 2023

Perpetua Resources Idaho, Inc.

aboutUSD27.1 million

Domestic antimony trisulfide process demonstration and modular pilot plant using Stibnite ore

CommitmentGrantPublicPartially disbursedProcessing

Source-reviewed industrial observations

No source-reviewed project milestone is published for this undertaking. Any financing-row activity reports below remain attributed observations, not independently reviewed project milestones. Missing evidence does not establish inactivity.

Policy context

These records directly parent the project's finance or designation entries. Their presence does not establish a causal effect on industrial activity.

Control clauses on the same materials and stages

Clauses whose covered items share a material and a supply-chain stage with this project, with their legal status on 3 Nov 2026. An overlap of items, not a finding that the project is affected.

CNExport licensing · Item 1(1)MOFCOM/GACC Announcement No. 33 (2024)ProcessingIn force

Record

Sponsors
Not stated
Location
Idaho Falls, IdahoUS
Stages
Processing
Materials
AntimonyTracked materials only
Programmes
None recorded
Latest financing-row activity report
Operational29 Jul 2026U.S. Army

What remains unknown

Gaps describe the available SMPT record. They do not establish that an activity did not occur.

  • No project-native source-reviewed industrial milestone is published. Attributed activity in financing histories remains a separate evidence class; no exact milestone date or facility-wide conclusion is inferred.
  • The project registry does not identify a sponsor organization. Providers and recipients are recorded separately.
  • Historical amount review is incomplete. Current amounts cannot be read as a time series of earlier commitments.
  • Structural links and shared materials do not demonstrate that a government measure caused an industrial outcome.

Evidence

Every project fact names the source that states it.

  1. U.S. Army, Perpetua Resources, and INL launch domestic antimony sulfide processing facility

    U.S. Army

    Fields supported
    Name · Location · Supply-chain stages · Materials
    Evidence level
    Explicit
    Location in document
    Opening paragraphs
    Qualification
    Army article describes the prototype processing facility at INL and its antimony-sulfide demonstration role.
    View source dossier →

For citations, open a parent policy record for BibTeX, RIS and CSL formats. Cite original documents for claims about government action.

Project registry JSON with sources · Full dataset and download guide