financial-assurance-adequacy-adjustment-memo.docx

1039-00003 · Torchlight Mining Corp · Financial Assurance & Trust

financial-assurance-adequacy-adjustment-memo.docx DOCUMENT Antitrust

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MEMORANDUM

TO: Miriam Soo-Hwan Park, General Counsel, Torchlight Mining Corp. Carolyn Bracebridge, Chief Financial Officer, Torchlight Mining Corp. Gareth Linford, Vice President, Environmental Health & Safety, Torchlight Mining Corp.

FROM: Harrison Wexford, Calderwood & Harkness LLP Elliot Nguyen, Calderwood & Harkness LLP Grace Nakamura, Calderwood & Harkness LLP

DATE: February 20, 2025

RE: Financial Assurance Adequacy and Annual Adjustment Mechanism — Consent Decree, Civil Action No. 9:24-cv-00087-DWM

MATTER NO.: 1039-00003

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I. Executive Summary

This memorandum analyzes whether the $245.0 million financial assurance package established under the consent decree entered in United States of America and State of Montana v. Torchlight Mining Corp. et al., Civil Action No. 9:24-cv-00087-DWM, is adequate to cover Torchlight Mining Corp.'s ("TMC") remediation obligations at all four sites subject to the decree. In addition, this memorandum explains in detail the annual adjustment mechanism that governs future changes to the financial assurance amounts, and addresses the interaction of these obligations with TMC's broader financial commitments, risk factors, and recommended internal compliance procedures.

The consent decree was filed in the United States District Court for the District of Montana, Missoula Division (Hon. Donald W. Molloy presiding), and requires TMC and its U.S. subsidiaries to maintain financial assurance in the aggregate amount of $245.0 million. This financial assurance is comprised of two instruments:

• A surety bond issued by Ironbark Surety of America, Inc. in the face amount of $165.0 million (Bond No. ISA-ENV-2025-08934); and

• A remediation trust fund held by Larchfield Trust Company, N.A. in the initial amount of $80.0 million (Trust Agreement No. LTC-REM-2025-1177, Trust Officer David Henshaw).

The consent decree mandates annual review and adjustment of financial assurance amounts, pegged to inflation indices (specifically, the Consumer Price Index for All Urban Consumers, or CPI-U) and updated remediation cost estimates prepared by TMC's environmental consultant and reviewed by the court-appointed independent monitor.

Our principal conclusion is as follows: The $245.0 million financial assurance package is adequate to cover the net present value ("NPV") of total remediation obligations, which we calculate at $245.1 million using a 3% discount rate. However, the financial assurance falls short of the total nominal remediation cost of $343.5 million and the grand total nominal obligation (including civil penalties, past-costs reimbursement, supplemental environmental projects, and independent monitor costs) of $409.9 million. The annual adjustment mechanism is specifically designed to bridge the gap between the initial financial assurance amount and escalating nominal remediation costs over time, accounting for cost escalation, remedy modifications, inflation, and actual remediation progress.

This memorandum sets forth our recommendations for TMC's internal financial planning and compliance procedures, including the establishment of an annual review working group, coordination with key advisors and counterparties, monitoring of credit facility covenant headroom, and contingency planning for identified risk factors such as surety market conditions, trust fund investment returns, cost escalation, and currency exposure.

II. Background — Consent Decree Financial Assurance Requirements

A. Statutory and Regulatory Framework

The financial assurance requirements applicable to TMC's remediation obligations arise under multiple federal environmental statutes and their implementing regulations, each of which imposes distinct requirements depending on the regulatory program under which the site is managed. We summarize the applicable frameworks below.

Resource Conservation and Recovery Act ("RCRA") Financial Assurance Requirements. Two of the four sites subject to the consent decree — the Gallatin Chemical Works facility (EPA Permit No. MTD098712456, located at 8800 Industrial Park Lane, Belgrade, Gallatin County, Montana 59714) and the Kanawha Bend Chemical Plant (EPA Permit No. WVD048823915, located at 2200 Chemical Valley Road, Institute, Kanawha County, West Virginia 25112) — are subject to RCRA financial assurance requirements codified at 40 C.F.R. Part 264, Subpart H. These regulations require owners and operators of hazardous waste treatment, storage, and disposal facilities to demonstrate financial assurance for the estimated cost of closure, post-closure care, and corrective action. The regulations prescribe specific mechanisms for satisfying these requirements and establish minimum standards for each instrument.

CERCLA § 107 Cost-Recovery Assurance Requirements. The Ridgecrest Copper-Molybdenum Mine (located at 14200 Ridgecrest Mine Road, Drummond, Granite County, Montana 59832) is subject to a proposed listing on the National Priorities List ("NPL") and is governed by an Administrative Order on Consent ("AOC"), Docket No. CERCLA-08-2022-0039. CERCLA § 107 authorizes the United States to recover response costs from responsible parties and, in the context of settlement agreements and consent decrees, to require financial assurance that the settling party will perform agreed-upon response actions. The financial assurance provisions in the consent decree with respect to Ridgecrest are negotiated terms that draw upon the general framework of RCRA financial assurance mechanisms but are tailored to the CERCLA cost-recovery and remediation context.

Clean Water Act ("CWA") Enforcement Context — Bonanza Creek Mine. The Bonanza Creek Gold Mine (located at County Road 447, Mile Marker 12, Lander County, Nevada 89820) is the subject of CWA enforcement action. Unlike RCRA, the CWA does not contain an express statutory mandate for financial assurance in connection with remediation or corrective action. Rather, the financial assurance obligation for the Bonanza Creek site was negotiated as a specific term of the consent decree, reflecting the parties' agreement that TMC would secure performance of its remediation and mitigation obligations at this site through the same financial assurance package applicable to the RCRA and CERCLA sites.

Acceptable Financial Assurance Instruments. Under 40 C.F.R. § 264.143, acceptable financial assurance mechanisms include: (1) surety bonds guaranteeing payment or performance; (2) trust funds; (3) irrevocable standby letters of credit; (4) environmental liability insurance policies; and (5) financial tests and corporate guarantees meeting specified financial criteria. The consent decree in this matter specifies that TMC's financial assurance shall consist exclusively of a surety bond and a remediation trust fund — the parties having agreed during negotiations that these two instruments, in combination, provide the most reliable and verifiable form of assurance given the scope and duration of the remediation obligations at issue. Letters of credit, insurance, and the financial test/corporate guarantee mechanism were considered during negotiations but were not accepted by the United States as primary instruments in this case, although certain of these may serve as replacement instruments under specific circumstances described in Section IV.E below.

B. Overview of the Four Sites and Remediation Costs

The consent decree encompasses remediation obligations at four geographically dispersed sites, each with distinct contaminant profiles, remediation technologies, and cost trajectories. The negotiated remediation cost for each site was developed through an iterative process involving TMC's internal estimates, EPA's independent cost estimates, and the assessments of TMC's environmental consultant, Pinnacle Creek Environmental, LLC ("Pinnacle Creek"). We summarize the sites and their respective remediation costs below.

1. Ridgecrest Copper-Molybdenum Mine (14200 Ridgecrest Mine Road, Drummond, Granite County, MT 59832). The Ridgecrest site is a former open-pit and underground copper-molybdenum mining operation that presents the most complex and costly remediation challenges among the four sites. Remediation activities include acid mine drainage treatment, tailings impoundment stabilization, contaminated groundwater extraction and treatment, surface water restoration, and ecological habitat reconstruction. The negotiated remediation cost is $198.6 million over a 30-year remediation period, yielding an NPV at a 3% discount rate of $134.9 million. This figure represents a compromise between TMC's initial estimate of $187.5 million and EPA's estimate of $224.0 million. The gap between the parties' estimates was attributable principally to differing assumptions regarding long-term acid mine drainage treatment costs, the expected useful life of water treatment infrastructure, and the scope of ecological restoration required to achieve performance standards.

2. Gallatin Chemical Works (8800 Industrial Park Lane, Belgrade, Gallatin County, MT 59714). The Gallatin site is a former chemical manufacturing facility requiring RCRA corrective action, including soil excavation and off-site disposal, groundwater pump-and-treat remediation, soil vapor extraction, and institutional controls. The remediation cost, per the Pinnacle Creek estimate accepted by the parties, is $42.8 million over a 15-year remediation period, yielding an NPV at a 3% discount rate of $34.1 million.

3. Bonanza Creek Gold Mine (County Road 447, Mile Marker 12, Lander County, NV 89820). The Bonanza Creek site is a former heap-leach gold mining operation requiring heap-leach pad closure, process solution neutralization and treatment, surface water and groundwater remediation, and revegetation. The remediation cost, per the Pinnacle Creek estimate, is $63.2 million over a 20-year remediation period, yielding an NPV at a 3% discount rate of $47.1 million.

4. Kanawha Bend Chemical Plant (2200 Chemical Valley Road, Institute, Kanawha County, WV 25112). The Kanawha Bend site is a former specialty chemical manufacturing plant requiring RCRA corrective action, including soil and sediment remediation, groundwater treatment, off-site migration containment, and long-term monitoring. The remediation cost, per the Pinnacle Creek estimate, is $38.9 million over a 20-year remediation period, yielding an NPV at a 3% discount rate of $29.0 million.

The following table summarizes the remediation cost estimates for all four sites:

C. Non-Remediation Obligations (Not Covered by Financial Assurance)

The consent decree imposes several categories of financial obligations on TMC beyond the remediation costs discussed above. Critically, these non-remediation obligations are not secured by the financial assurance package — the $245.0 million financial assurance is designed exclusively to secure the performance of remediation obligations at the four sites. The non-remediation obligations are summarized below.

Civil Penalties. TMC is obligated to pay civil penalties totaling $31.5 million, allocated among the four sites as follows: Ridgecrest — $14.2 million; Gallatin — $5.8 million; Bonanza Creek — $7.9 million; and Kanawha Bend — $3.6 million. The civil penalties are payable in four equal quarterly installments of $7.875 million each, commencing 30 days after the Effective Date of the consent decree (currently anticipated to be July 14, 2025, assuming an Effective Date of June 14, 2025). Interest accrues on unpaid penalties at the rate specified in 28 U.S.C. § 1961.

EPA Past-Costs Reimbursement. Under CERCLA § 107, TMC is obligated to reimburse EPA for past response costs totaling $18.1 million, comprising $14.3 million attributable to the Ridgecrest site and $3.8 million attributable to the Kanawha Bend site. These amounts are payable within 60 days after the Effective Date.

Supplemental Environmental Projects ("SEPs"). TMC has committed to fund three supplemental environmental projects totaling $12.0 million: (1) the Flint Creek Watershed Restoration Project ($5.5 million), which will address legacy mining impacts in the Flint Creek watershed in Granite County, Montana; (2) the Battle Mountain Community Drinking Water Improvement Project ($3.5 million), which will upgrade municipal drinking water treatment infrastructure in Battle Mountain, Lander County, Nevada; and (3) the Institute Community Air Quality Monitoring Network ($3.0 million), which will establish a community-based air quality monitoring system in the Institute area of Kanawha County, West Virginia. Completion deadlines for each SEP are specified in the consent decree.

Independent Monitor Costs. The consent decree provides for the appointment of Verdant Analytics, Inc. (Dr. Kamal Osei, Senior Managing Director) as an independent monitor to conduct quarterly compliance audits and annual reporting on TMC's remediation performance. The estimated cost of the independent monitor over the initial five-year monitoring period is $4.8 million (approximately $960,000 per year). TMC is responsible for all costs of the independent monitor.

The following table summarizes TMC's total financial obligations under the consent decree:

The financial assurance amount of $245.0 million is designed to secure the remediation obligations specifically. The penalty, past-costs, SEP, and monitoring obligations represent separate payment obligations that TMC must satisfy from its general corporate funds. TMC should ensure that its cash flow planning and budgeting process accounts for all categories of consent decree obligations, not merely those secured by financial assurance.

III. Structure of the Current Financial Assurance Package

A. Surety Bond — Ironbark Surety of America, Inc.

The primary component of TMC's financial assurance package is a surety bond issued by Ironbark Surety of America, Inc. The material terms and characteristics of this bond are as follows:

Bond Number: ISA-ENV-2025-08934

Face Amount: $165.0 million

Issuer: Ironbark Surety of America, Inc., a New York-domiciled insurance company, with its principal office at 599 Lexington Avenue, 26th Floor, New York, New York 10022. Ironbark Surety of America is a wholly-owned subsidiary of Ironbark Surety Group, Ltd., a Bermuda-domiciled insurance holding company. The account executive responsible for the TMC relationship is Thomas Rennick.

Annual Premium: The annual premium for the surety bond is 1.85% of the face value, equaling $3,052,500 per year ($3.0525 million). The premium is payable annually in advance on the anniversary date of bond issuance. This premium rate was negotiated in the context of TMC's current credit profile and reflects market conditions prevailing at the time of bond issuance. The premium rate is subject to renegotiation upon material changes in TMC's creditworthiness or prevailing surety market conditions, as discussed further in Section IV.E.

Obligee: The United States Environmental Protection Agency ("EPA"), acting on behalf of the United States, and the co-plaintiff states (State of Montana, State of Nevada, and State of West Virginia).

Principal: Torchlight Mining Corp. and its U.S. subsidiaries, specifically: Torchlight Mining (U.S.) Inc., Torchlight Specialty Chemicals, Inc., Ridgecrest Mine Holdings, LLC, and Bonanza Creek Mining, LLC (collectively, the "TMC Entities"). All TMC Entities are jointly and severally liable under the bond.

Bond Term: The surety bond is a continuous bond, meaning it does not have a fixed expiration date but remains in force indefinitely, subject to annual renewal provisions and the adjustment mechanisms described in Section IV. The bond is non-cancellable except upon 120 days' advance written notice to EPA, DOJ, all co-plaintiff states, and the Court. This extended notice period — significantly longer than the 90-day notice period that is typical for environmental surety bonds — was a specifically negotiated term of the consent decree, designed to provide TMC and the government parties with adequate time to arrange replacement assurance in the event of cancellation.

Indemnity Agreement: In connection with the issuance of the surety bond, TMC has executed a General Agreement of Indemnity ("GAI") in favor of Ironbark, pursuant to which TMC (at the parent-company level) and all U.S. subsidiaries jointly and severally indemnify Ironbark for any losses, costs, or expenses incurred in connection with the bond. Under the terms of the GAI, Ironbark may require TMC to post collateral (in the form of cash, letters of credit, or pledges of assets) in the event of a material adverse change in TMC's financial condition or creditworthiness. The collateral trigger provisions are defined by reference to specified financial metrics, including leverage ratios and credit rating thresholds.

It is important to note that the indemnity agreement constitutes a contingent obligation of TMC that may implicate negative covenants regarding liens and permitted indebtedness under TMC's syndicated revolving credit facility with Harborstone National Bank, N.A. This interaction is discussed further in Section V.A below.

B. Remediation Trust Fund — Larchfield Trust Company, N.A.

The second component of TMC's financial assurance package is a remediation trust fund established with Larchfield Trust Company, N.A. The material terms and characteristics of this trust are as follows:

Trust Agreement Number: LTC-REM-2025-1177

Trustee: Larchfield Trust Company, N.A., a nationally chartered trust company, with its principal office at 200 South Tryon Street, Suite 1100, Charlotte, North Carolina 28202. The designated trust officer for this account is David Henshaw.

Initial Deposit: TMC is required to deposit $80.0 million into the remediation trust fund. This initial deposit is due by September 12, 2025, which is 90 days after the anticipated Effective Date of the consent decree (June 14, 2025). The deposit may be made in a single lump sum or in installments, provided that the full $80.0 million is on deposit no later than the September 12 deadline. TMC's current intention, as communicated by CFO Carolyn Bracebridge, is to fund the initial deposit in a single wire transfer from TMC's primary operating account at Harborstone National Bank.

Grantor: Torchlight Mining Corp.

Beneficiary: The United States Environmental Protection Agency, acting on behalf of the United States. The trust is irrevocable during the term of the consent decree, and the trust corpus may not be returned to TMC or applied to any purpose other than the remediation obligations at the four sites, except upon termination of the trust as described below.

Investment Guidelines: The trust agreement contains strict investment limitations designed to preserve the trust corpus and minimize investment risk. The trust corpus is required to be invested exclusively in: (i) direct obligations of the United States Treasury (including Treasury bills, notes, and bonds); (ii) obligations of United States government agencies or government-sponsored enterprises that are backed by the full faith and credit of the United States; or (iii) money market funds that invest exclusively in the foregoing categories of instruments. No equity securities, corporate debt obligations, municipal bonds, or alternative investments of any kind are permitted. These restrictions reflect the consent decree's emphasis on capital preservation over return maximization, which is consistent with standard practice for environmental remediation trust funds under RCRA and CERCLA.

Disbursement Procedures: Trust fund disbursements may be made solely for the purpose of paying documented remediation costs at the four consent decree sites. All disbursements require prior written approval from EPA (or from the EPA Project Coordinator for individual disbursement requests under $500,000). TMC must submit quarterly disbursement requests to EPA, accompanied by supporting documentation including invoices, contractor certifications, and progress reports. EPA has 30 days to approve or deny a disbursement request. Denied requests may be appealed through the consent decree's dispute resolution mechanism.

Treatment of Trust Income: All investment income earned by the trust fund — including interest, dividends, and capital gains — is reinvested in the trust corpus and is treated as part of the financial assurance amount for purposes of the annual adequacy calculations described in Section IV. This means that as the trust corpus grows through investment returns, the effective financial assurance amount increases correspondingly, potentially reducing or eliminating the need for supplemental deposits in connection with annual adjustments.

Tax Treatment: The remediation trust fund is structured as a qualified settlement fund ("QSF") under Internal Revenue Code § 468B and the regulations promulgated thereunder. As a QSF, the trust fund is a separate taxpaying entity, subject to federal income tax on its investment income at the rate applicable to trusts and estates. TMC is responsible for all trustee fees associated with the administration of the trust, which are estimated at 0.10% to 0.15% of the trust corpus on an annual basis (i.e., approximately $80,000 to $120,000 per year based on the initial $80.0 million deposit, with fees increasing as the corpus grows through additional deposits or investment returns).

Trust Termination: The trust will terminate upon: (i) EPA's certification that all remediation obligations at all four sites have been completed and all performance standards have been achieved; and (ii) entry of an order by the Court terminating the consent decree. Upon termination of the trust, any residual trust funds (i.e., corpus and accumulated investment income remaining after satisfaction of all remediation costs and trustee fees) will be returned to TMC as the grantor.

C. Aggregate Financial Assurance Coverage Analysis

Combining the two instruments, TMC's total financial assurance package at inception is valued at $245.0 million, consisting of the $165.0 million Ironbark surety bond and the $80.0 million Larchfield remediation trust fund. We assess the adequacy of this package against TMC's remediation obligations on both an NPV basis and a nominal basis.

NPV Basis. The total NPV of TMC's remediation obligations across all four sites, discounted at 3%, is $245.1 million. The coverage ratio on an NPV basis is therefore:

$245.0M ÷ $245.1M = 99.96%

This represents essentially full coverage of remediation obligations on a present-value basis. The marginal shortfall of $0.1 million (approximately $100,000) is de minimis and well within the margin of error inherent in the underlying cost estimates.

Nominal Basis. The total nominal remediation cost across all four sites is $343.5 million. The coverage ratio on a nominal basis is:

$245.0M ÷ $343.5M = 71.3%

The gap between the nominal remediation cost and the financial assurance amount is $98.5 million. This gap is not, however, a deficiency in the financial assurance structure. Rather, it reflects the fundamental principle underlying environmental financial assurance: because remediation expenditures are phased over decades (up to 30 years in the case of the Ridgecrest site), it is not necessary — and regulatory practice does not require — that the full nominal cost of remediation be secured at inception. The gap between nominal cost and initial financial assurance is expected to be covered by: (i) investment returns generated by the trust fund corpus over the remediation period; (ii) annual upward adjustments to the financial assurance amount through the CPI-U inflation indexing mechanism; and (iii) additional deposits and bond increases as required by updated remediation cost estimates.

The consent decree's annual adjustment mechanism, discussed in detail in Section IV, is the primary tool by which financial assurance adequacy is maintained over time.

IV. Annual Adjustment Mechanism

A. Overview of the Consent Decree Adjustment Provision

The consent decree recognizes that a static financial assurance amount established at the time of decree entry will inevitably become inadequate over a multi-decade remediation period due to inflation, changes in remediation scope or technology, and evolving regulatory requirements. Accordingly, the decree mandates an annual review of the financial assurance amount and, where warranted, upward or downward adjustment to maintain adequacy relative to remaining remediation obligations.

The first annual review is required to be completed within 12 months of the Effective Date of the consent decree — i.e., by June 14, 2026 (assuming the Effective Date is June 14, 2025). Subsequent annual reviews are required on each anniversary of the Effective Date thereafter, continuing until the consent decree is terminated. In practical terms, this means that the annual review process will recur for the duration of the remediation program, which extends up to 30 years for the Ridgecrest site.

The annual adjustment determination is made jointly by TMC and EPA. The consent decree contemplates a collaborative process in which TMC submits proposed adjustments (or a confirmation that no adjustment is warranted) to EPA, and EPA either concurs or proposes alternative adjustments. If the parties agree, the adjustment becomes effective 30 days after the date of agreement and is memorialized in a written stipulation filed with the Court.

If the parties are unable to reach agreement on the appropriate adjustment, the consent decree provides a three-tier dispute resolution mechanism:

Tier 1 — Informal Negotiation. TMC and EPA engage in informal negotiations for a period of 30 days following written notice of the dispute. During this period, designated representatives of TMC (the VP EHS or designee) and EPA (the Project Coordinator or designee) meet and confer in good faith to attempt resolution.

Tier 2 — Formal EPA Decision. If the dispute is not resolved through informal negotiation, EPA issues a formal written decision on the disputed adjustment within 30 days following the conclusion of the informal negotiation period. The formal decision must set forth EPA's rationale, including any reliance on updated cost estimates, regulatory requirements, or other relevant factors.

Tier 3 — Judicial Review. TMC may seek judicial review of EPA's formal decision by filing a motion with the Court within 30 days after receipt of EPA's decision. The Court reviews EPA's decision under an arbitrary and capricious standard with respect to matters within EPA's expertise (e.g., remedy scope and cost), and de novo with respect to legal questions (e.g., interpretation of consent decree provisions).

Given the potential for annual reviews to involve substantial sums and the complexity of the underlying cost estimates, TMC should be prepared to engage in the dispute resolution process if EPA's proposed adjustments materially differ from TMC's assessments. However, TMC should also be mindful that the dispute resolution process is time-consuming and resource-intensive, and that a cooperative relationship with EPA will generally yield more favorable outcomes over the long term.

B. Inflation Indexing

The consent decree pegs the minimum annual adjustment of the financial assurance amount to the Consumer Price Index for All Urban Consumers ("CPI-U"), as published by the U.S. Bureau of Labor Statistics. The CPI-U is a broadly recognized measure of economy-wide inflation and is commonly used as a baseline index for financial assurance adjustment provisions in environmental consent decrees and administrative orders.

The annual inflation adjustment operates as follows: the total required financial assurance amount is increased (or decreased, in the event of deflation) by the percentage change in CPI-U from the 12-month period preceding each annual review date. For illustrative purposes:

If CPI-U increases by 3.2% in the 12-month period preceding the first annual review (June 14, 2026), the required financial assurance amount would increase from $245.0 million to:

$245.0M × 1.032 = $252.84 million

This would represent an increase of $7.84 million from the initial financial assurance amount.

It is critical to understand that the CPI-U adjustment serves as a floor, not a ceiling. The consent decree expressly provides that actual adjustments may exceed the CPI-U factor if updated remediation cost estimates warrant a larger increase. In other words, the CPI-U adjustment ensures that the financial assurance amount keeps pace with general inflation at a minimum, but the annual review process may result in larger adjustments based on site-specific cost developments.

Conversely, in the unlikely event that CPI-U declines (i.e., a deflationary period), the financial assurance amount could theoretically be reduced by the CPI-U decrease, although any such reduction would remain subject to the other adequacy requirements discussed below and to the negotiated floor of $50.0 million.

When an increase to the total financial assurance amount is required, TMC must allocate the increase between the surety bond and the trust fund. The consent decree provides that this allocation should be made in consultation with EPA. If TMC and EPA are unable to agree on the allocation, the increase is allocated pro rata based on the original proportional split between the two instruments:

• Surety bond share: $165.0M ÷ $245.0M = 67.35%

• Trust fund share: $80.0M ÷ $245.0M = 32.65%

Applying the pro rata allocation to the illustrative $7.84 million increase described above, the surety bond face amount would increase by approximately $5.28 million (to $170.28 million), and the trust fund would require an additional deposit of approximately $2.56 million (bringing the required trust fund balance to $82.56 million, subject to adjustment for accumulated investment income).

C. Updated Remediation Cost Estimates

In addition to the inflation indexing mechanism, the consent decree requires TMC to submit updated remediation cost estimates at each annual review. These updated estimates are a critical component of the adjustment process because they capture changes in remediation costs that may not be reflected in the general CPI-U inflation index — including changes in remedy scope, design modifications, site-specific cost developments, and regulatory changes.

The updated cost estimates are required to be prepared by Pinnacle Creek Environmental, LLC, TMC's environmental consultant of record under the consent decree. The Pinnacle Creek engagement is led by Dr. Astrid Bergmann, P.E., Senior Principal, located at 320 Willowbrook Drive, Suite 100, Bozeman, Montana 59715. Pinnacle Creek has served as TMC's primary environmental consulting firm for remediation cost estimation since the inception of the enforcement proceedings and possesses detailed familiarity with all four sites.

The consent decree specifies that the updated cost estimates must reflect the following factors:

(i) Actual remediation expenditures incurred to date. The updated estimate must account for all remediation costs that have been incurred and paid since the prior estimate, reflecting the reduction in remaining remediation obligations.

(ii) Changes in remedy scope or design. If the approved remedy at any site has been modified — whether through EPA-approved changes, performance-based adjustments, or court orders — the updated estimate must reflect the cost implications of such modifications.

(iii) Changes in unit costs for labor, materials, and equipment. The updated estimate must incorporate current market pricing for key remediation inputs, including construction labor, earthmoving equipment, chemical reagents, monitoring instrumentation, and waste transportation and disposal services.

(iv) Changes in regulatory requirements. If applicable environmental standards have been revised (e.g., more stringent water quality criteria, updated risk-based cleanup levels, or new air emission standards), the updated estimate must reflect the cost of compliance with revised requirements.

(v) Any modifications approved by EPA or ordered by the Court. This catch-all provision ensures that the updated estimate captures all consent-decree-related changes, including modifications to schedules, milestones, and performance standards.

The updated cost estimates prepared by Pinnacle Creek are subject to independent review by Verdant Analytics, Inc. (Dr. Kamal Osei, Senior Managing Director, 1550 NW Couch Street, Suite 400, Portland, Oregon 97209), the court-appointed independent monitor. Verdant Analytics reviews the updated cost estimates as part of its quarterly compliance audit and annual reporting process, and provides an independent assessment to EPA. If Verdant identifies material discrepancies between Pinnacle Creek's estimates and its own independent assessment, Verdant may recommend that EPA require additional adjustments to the financial assurance amount.

In addition, Cascade Geosciences, Inc. (Dr. Patricia Voss, Principal, 804 Salmon Bay Drive, Seattle, Washington 98107), which serves as the government's technical expert, may review and comment on the updated cost estimates on behalf of EPA. Cascade Geosciences has provided technical consulting services to EPA Region 8 throughout the enforcement proceedings and has independent access to site data, monitoring results, and remedy performance information.

If the updated cost estimate for any individual site exceeds the prior year's estimate by more than 10%, the consent decree imposes an additional procedural requirement: TMC must provide a detailed written explanation of the factors driving the cost increase, and may be required to increase the financial assurance amount beyond the CPI-U adjustment to cover the incremental cost. This 10% threshold serves as an early warning mechanism to ensure that significant cost escalation is identified and addressed promptly, rather than accumulating unnoticed over multiple review periods.

D. Downward Adjustments and Credits

The annual adjustment mechanism is not exclusively upward. The consent decree also provides for downward adjustments to the financial assurance amount as remediation milestones are achieved and verified. The downward adjustment provisions serve two important functions: they incentivize timely and effective remediation performance by TMC, and they ensure that the financial assurance amount remains appropriately calibrated to actual remaining obligations rather than inflated by obligations that have already been satisfied.

Milestone-Based Reductions. The consent decree permits site-by-site reductions in the financial assurance amount upon the achievement and certification of specified remediation milestones. Specifically, once EPA certifies that all remedial construction at a given site is complete and that performance standards are being met, the financial assurance attributable to that site may be reduced to cover only the estimated costs of long-term monitoring and maintenance at that site. This represents a potentially significant reduction, as long-term monitoring and maintenance costs are typically a fraction of total remediation costs.

For example, if EPA certifies that remedial construction at the Gallatin Chemical Works is complete and performance standards are being met, the financial assurance attributable to Gallatin could potentially be reduced from $34.1 million (its initial NPV allocation) to an amount reflecting only the estimated long-term monitoring costs, which might be on the order of $5.0–$8.0 million depending on the monitoring program requirements.

Credit for Actual Remediation Expenditures. Documented remediation expenditures by TMC that have been approved by EPA are credited against the remaining remediation obligation, proportionally reducing the required financial assurance amount. This credit mechanism ensures that as TMC actually performs and pays for remediation work, the financial assurance requirement declines in tandem with the declining remaining obligation.

Minimum Floor. The consent decree establishes an absolute floor below which the total financial assurance amount may not be reduced, regardless of the progress of remediation. Specifically, no reduction may bring the total financial assurance below the greater of:

(i) the remaining estimated remediation cost (on an NPV basis) for all sites combined; or

(ii) $50.0 million.

The $50.0 million floor was a specifically negotiated term of the consent decree, reflecting the United States' insistence on maintaining a minimum level of financial assurance throughout the decree term to guard against unforeseen cost increases, remedy failures, or changes in site conditions that could give rise to additional remediation obligations.

Procedural Requirements for Downward Adjustments. TMC must submit any request for a downward adjustment in writing, accompanied by EPA-certified completion documentation for the relevant remediation milestones. EPA has 60 days to review and approve or deny a downward adjustment request. If EPA denies the request, the matter may be escalated through the three-tier dispute resolution mechanism described in Section IV.A. Given the procedural complexity and the 60-day EPA review period, TMC should plan downward adjustment requests well in advance of the annual review date to ensure that any approved reductions can be incorporated into the annual adjustment determination.

E. Surety Bond Renewal and Adjustment Procedures

The Ironbark surety bond (Bond No. ISA-ENV-2025-08934) is structured as a continuous bond, meaning that it does not require annual renewal in the traditional sense. However, the bond is subject to annual premium recalculation and face-amount adjustments in connection with the consent decree's annual review process.

Upward Adjustments. If the annual review results in an increase to the required financial assurance amount, and all or part of that increase is allocated to the surety bond component, TMC must obtain a bond rider or endorsement from Ironbark increasing the face amount of the bond to the adjusted level. TMC has 60 days from the date of the adjustment determination to obtain and deliver the rider or endorsement to EPA. TMC should coordinate with Thomas Rennick at Ironbark well in advance of the annual review date to ensure that the underwriting process for any required increase can be completed within the 60-day window.

Premium Recalculation. When the face amount of the bond is adjusted, the annual premium is recalculated by applying the bond rate (currently 1.85%) to the adjusted face amount. For example, if the bond face amount is increased from $165.0 million to $170.28 million, the new annual premium would be $170.28M × 0.0185 = $3,150,180 (an increase of approximately $97,680 from the current premium of $3,052,500). The premium rate itself is subject to renegotiation upon material credit deterioration, adverse changes in surety market conditions, or other factors that materially affect the risk profile of the bond from Ironbark's perspective.

Cancellation and Replacement. If Ironbark declines to increase the bond amount to the required level, or if Ironbark elects to cancel the bond (which requires 120 days' advance written notice to EPA and the Court), TMC must obtain a replacement bond from a qualified surety or substitute an alternative financial assurance instrument within the 120-day notice period. Acceptable alternative instruments include: (i) a replacement surety bond from another qualified surety; (ii) an additional deposit to the Larchfield remediation trust fund sufficient to cover the surety bond's portion of the financial assurance requirement; (iii) an irrevocable standby letter of credit from a qualified financial institution; or (iv) a corporate guarantee from TMC's parent company, if EPA agrees to accept such an instrument (which EPA is not required to do under the consent decree).

TMC is required to notify EPA, DOJ, and the Court within 10 business days of receiving any notice of cancellation or non-renewal from Ironbark. Prompt notification is essential to preserve TMC's compliance with the consent decree and to initiate the process of arranging replacement assurance.

Ironbark Financial Strength Requirements. The consent decree requires that the surety issuing the bond maintain a minimum financial strength rating of A- (Excellent) or equivalent from a nationally recognized rating agency. Ironbark Surety Group, Ltd. (the parent company of Ironbark Surety of America) is currently rated A (Excellent), which satisfies this requirement with a one-notch cushion. If Ironbark is downgraded below the A- threshold, TMC must either: (i) obtain a replacement bond from a surety that meets the minimum rating requirement; or (ii) provide supplemental financial assurance in another acceptable form. TMC has 90 days from the effective date of a downgrade to complete the replacement or supplementation.

F. Trust Fund Adjustment Procedures

If the annual review results in an increase to the required financial assurance amount, and all or part of that increase is allocated to the trust fund component, TMC must make an additional deposit to the Larchfield Trust Company, N.A. remediation trust fund within 60 days of the adjustment determination.

Importantly, trust fund investment returns are credited toward the required amount. If the trust corpus — including the original deposit and all accumulated investment income — equals or exceeds the allocated trust fund portion of the required financial assurance amount, no additional deposit is required for that component. This feature provides a natural mechanism by which the trust fund can grow organically over time to absorb a portion of the annual inflation adjustments, reducing the need for out-of-pocket supplemental deposits by TMC.

However, if trust fund investment returns are insufficient — for example, due to a prolonged period of low interest rates, or if real returns (i.e., nominal returns minus inflation) are negative — TMC must make supplemental deposits to maintain the trust fund at the required level. This risk is discussed further in Section VI.C.

The trustee, David Henshaw at Larchfield Trust Company, N.A., provides quarterly statements of the trust fund value (including both the principal corpus and accumulated investment income) to TMC, EPA, and the Court. These quarterly statements enable all parties to track the trust fund's performance relative to the required amount on an ongoing basis.

In addition, the trustee provides an annual certification of the trust fund balance as of the anniversary of the Effective Date. This annual certification must be submitted to EPA within 30 days of the anniversary date and serves as the basis for the trust fund component of the annual adequacy review. TMC should coordinate with David Henshaw to ensure that the annual certification is prepared and delivered in a timely manner, as delays in the trustee's certification could impede the annual review process.

V. Interaction with TMC's Broader Financial Obligations

The consent decree's financial assurance requirements do not exist in isolation. TMC's ability to maintain and adjust its financial assurance package over time must be assessed in the context of TMC's broader financial obligations, credit agreements, accounting requirements, and insurance programs. We address each of these interactions below.

A. Harborstone RCF Environmental Covenant

TMC's principal credit facility is a C$750.0 million syndicated revolving credit facility (the "RCF") with Harborstone National Bank, N.A. serving as administrative agent. The RCF matures on March 15, 2027, and contains a comprehensive set of financial covenants and negative covenants.

Of particular relevance to the financial assurance analysis is the RCF's environmental liability covenant, which requires that TMC's aggregate disclosed and undisclosed environmental liabilities not exceed 25% of consolidated net tangible assets ("CNTA"). As of Q3 2024, TMC reported CNTA of C$3.92 billion, yielding a 25% threshold of C$980.0 million (approximately US$724.4 million at the prevailing exchange rate of C$1 = US$0.7394).

TMC's current total environmental liabilities — including all consent decree obligations (remediation costs, penalties, past-costs reimbursement, SEPs, and monitor costs) — are approximately US$409.9 million, or approximately C$554.4 million at the current exchange rate. This yields covenant headroom of:

C$980.0M – C$554.4M = C$425.6 million (approximately US$314.7 million)

While TMC presently has substantial headroom under the environmental liability covenant, annual adjustments to the financial assurance amount that increase TMC's total environmental liability could erode covenant headroom over time. This is particularly concerning in a scenario where remediation cost estimates increase significantly beyond the CPI-U adjustment, or where TMC's CNTA declines due to asset impairments or other factors. TMC should monitor the interaction between financial assurance adjustments and RCF covenant compliance at each annual review, and should promptly notify Harborstone of any material changes in environmental liabilities.

In addition, the Ironbark surety bond indemnity agreement constitutes a contingent obligation of TMC — specifically, a contingent obligation to reimburse Ironbark for any losses incurred under the bond, secured by TMC's general corporate credit and potentially by pledged collateral. This contingent obligation may implicate the RCF's negative covenants regarding liens and permitted indebtedness. TMC should coordinate with Northspire Capital Markets, Inc. (Vivian Okafor, Managing Director, Liability & Risk Advisory, 277 Park Avenue, 40th Floor, New York, New York 10172) on ongoing compliance monitoring to ensure that the indemnity agreement does not create an event of default under the RCF. If necessary, TMC should seek a waiver or amendment from Harborstone to expressly exclude the Ironbark indemnity from the scope of the negative covenants.

B. Environmental Reserve Adequacy

TMC's environmental remediation reserve, as reported in its Q3 2024 financial statements, stands at C$340.0 million (approximately US$251.4 million). This reserve is established in accordance with ASC 450 (Accounting for Contingencies) under U.S. GAAP and IAS 37 (Provisions, Contingent Liabilities and Contingent Assets) under IFRS.

When compared to the total nominal grand total obligation of US$409.9 million, the reserve reflects a shortfall of approximately US$158.5 million. This shortfall requires careful analysis and documentation, as it represents the difference between the amount accrued on TMC's balance sheet and the total estimated obligation. A portion of the shortfall may be attributable to the fact that certain obligations (e.g., future-year remediation costs and inflation escalation) are recorded on a discounted or probability-weighted basis under the applicable accounting standards, while the nominal total obligation represents an undiscounted aggregate. TMC's external auditors and accounting advisors should confirm that the reserve methodology is appropriate and adequately disclosed.

Annual adjustments to the financial assurance amount that increase total remediation cost estimates will, in most cases, require corresponding increases to the accounting reserve under ASC 450 and IAS 37. TMC should coordinate with Ridgeline Accounting Partners LLP (Frances Whitmore, CPA, CA, engagement partner) to ensure that updated cost estimates from each annual review are promptly communicated to the audit team for incorporation into the financial statements, including the remediation reserve balance and related financial statement footnote disclosures. CFO Carolyn Bracebridge should establish an internal process to ensure that updated cost estimates from annual reviews are transmitted to the audit team within 15 business days of receipt, to allow adequate time for analysis and reserve adjustment before each fiscal year-end.

C. Insurance Recovery Considerations

TMC maintains a pollution legal liability ("PLL") insurance policy with Meridian Environmental Insurance Company (Policy No. MEI-ENV-2021-04738). The policy provides a per-occurrence limit of $50.0 million and an aggregate limit of $75.0 million, subject to a self-insured retention ("SIR") of $5.0 million per occurrence.

Coverage under the Meridian policy has been acknowledged for the Gallatin Chemical Works and Bonanza Creek Gold Mine sites, and has been denied for the Ridgecrest Copper-Molybdenum Mine and Kanawha Bend Chemical Plant sites. The coverage denials for Ridgecrest and Kanawha Bend are based on policy exclusions for pre-existing known contamination and regulatory enforcement actions predating the policy inception date. TMC's coverage counsel is evaluating the denials, but the prospects for reversal appear limited based on our current assessment.

For the covered sites (Gallatin and Bonanza Creek), Northspire Capital Markets estimates potential insurance recoveries in the range of $45.0–$55.0 million (net of the SIR), with a maximum theoretical recovery of $75.0 million (the aggregate policy limit). The precise recovery amount will depend on the timing and documentation of covered remediation expenditures, the application of deductibles and retentions, and the outcome of any coverage disputes with Meridian.

It is important to emphasize that potential insurance recoveries do not reduce the required financial assurance amount under the consent decree. The financial assurance is a separate and independent obligation that must be maintained regardless of whether TMC receives insurance proceeds. The financial assurance exists to guarantee performance of remediation obligations to EPA and the co-plaintiff states, whereas insurance recoveries are a private-party contractual right that benefits TMC's bottom line.

However, if insurance recoveries are received and applied to actual remediation costs at the covered sites, they would be credited against actual remediation expenditures, potentially enabling earlier downward adjustment of the financial assurance attributable to those sites. TMC should track and document all insurance recoveries carefully, and should submit them as part of the annual review process to support downward adjustment requests.

VI. Risk Factors and Contingencies

TMC's financial assurance obligations are subject to several risk factors and contingencies that could affect the cost, availability, and adequacy of the financial assurance package over the multi-decade term of the consent decree. We identify and assess the principal risk factors below.

A. Remedy Cost Escalation Risk

The most significant risk factor affecting the adequacy of TMC's financial assurance is the potential for remediation costs to escalate beyond the levels projected in the current cost estimates. This risk is most acute at the Ridgecrest Copper-Molybdenum Mine, where the 30-year remediation timeline creates substantial cost uncertainty. The principal drivers of cost escalation risk include:

Construction Cost Inflation. Historical data on mining site remediation indicates that construction cost inflation in the mining remediation sector has averaged 3–5% annually over the past two decades. This rate of cost escalation has frequently exceeded the general CPI-U inflation rate, which has averaged approximately 2.5% over the same period. To the extent that remediation-specific cost inflation outpaces CPI-U, the consent decree's inflation indexing mechanism may understate the actual increase in remediation costs, resulting in a gradual erosion of financial assurance adequacy.

Regulatory Changes. Revisions to applicable environmental standards — including more stringent water quality criteria for receiving streams, lower cleanup levels for contaminants of concern, or new technology-based treatment requirements — could significantly expand the scope and cost of remediation at one or more of the four sites. For example, EPA is currently evaluating potential revisions to ambient water quality criteria for copper and molybdenum, which could affect the Ridgecrest site's performance standards and treatment system design.

Climate Variability. Climate change and increased climate variability present operational risks to remediation programs at the Ridgecrest and Bonanza Creek sites. At Ridgecrest, changes in precipitation patterns and snowmelt timing could affect acid mine drainage volumes, potentially requiring expanded water treatment capacity. At Bonanza Creek, changes in evapotranspiration rates and extreme precipitation events could affect heap-leach pad management and stormwater controls. These climate-related factors are inherently difficult to predict and could result in substantial cost increases that are not captured in current cost estimates.

B. Surety Market Risk

TMC's ability to maintain the Ironbark surety bond over the term of the consent decree depends on both TMC's creditworthiness and conditions in the environmental surety market. The principal surety market risk factors include:

Premium Rate Risk. The current annual premium of $3.0525 million (1.85% of face value) reflects current market pricing and TMC's current credit profile. Tightening of the environmental surety market — driven by increased demand for environmental surety bonds, reduced surety capacity, or broader reinsurance market pressures — could result in significantly higher premium rates upon renegotiation. Premium increases of 25–50 basis points (i.e., to 2.10–2.35%) are plausible under stress scenarios, which would increase the annual premium cost by $412,500 to $825,000.

Collateral Demands. Under the terms of the General Agreement of Indemnity, Ironbark may require TMC to post collateral if TMC's financial condition deteriorates materially. TMC's EBITDA for fiscal year 2023 was C$1.14 billion; a significant decline below this level could trigger collateral demands from Ironbark, diverting cash or encumbering assets that would otherwise be available for operations or capital expenditures.

Market Capitalization. TMC's current market capitalization is approximately C$7.6 billion. A significant decline in market capitalization — whether driven by commodity price volatility, operational issues, or broader market conditions — could affect TMC's surety capacity and the willingness of sureties to issue or maintain bonds of this magnitude.

C. Trust Fund Investment Risk

The remediation trust fund's ability to contribute to long-term financial assurance adequacy depends on the investment returns generated by the trust corpus. The consent decree's restrictive investment guidelines — limiting the trust to U.S. Treasury obligations and equivalent instruments — minimize credit risk and liquidity risk but also limit return potential. The principal investment risk factors include:

Real Return Risk. In high-inflation environments, the nominal return on U.S. Treasury obligations may be lower than the CPI-U inflation rate, resulting in negative real returns on the trust corpus. In such a scenario, the trust fund's purchasing power declines over time, and TMC will be required to make supplemental deposits to maintain the required financial assurance level. For example, if the trust fund earns a nominal return of 3.5% per year but CPI-U inflation is 4.5% per year, the trust fund's real return is -1.0%, requiring approximately $800,000 per year in supplemental deposits to maintain a real value of $80.0 million.

Trustee Fee Drag. The estimated trustee fees of 0.10–0.15% of the trust corpus reduce the effective investment return. While modest in absolute terms (approximately $80,000–$120,000 per year based on the initial $80.0 million corpus), these fees compound over time and contribute to the overall drag on trust fund performance.

D. Currency Risk

TMC reports its financial results in Canadian dollars, while the financial assurance obligations under the consent decree are denominated in U.S. dollars. The current exchange rate of C$1 = US$0.7394 means that the C$-equivalent cost of maintaining US$245.0 million in financial assurance is approximately C$331.3 million. Fluctuations in the CAD/USD exchange rate could significantly affect the Canadian-dollar cost of maintaining the financial assurance package.

For example, a 10% depreciation of the Canadian dollar (to C$1 = US$0.6655) would increase the C$-equivalent cost to approximately C$368.1 million, an increase of C$36.8 million. Conversely, a 10% appreciation of the Canadian dollar (to C$1 = US$0.8133) would reduce the C$-equivalent cost to approximately C$301.2 million, a decrease of C$30.1 million.

Given the multi-decade duration of the financial assurance obligations, TMC is exposed to substantial long-term currency risk. TMC should consider implementing a hedging strategy for this exposure, as discussed in the Recommendations section below.

VII. Compliance Procedures and Internal Controls

Effective compliance with the consent decree's annual review and adjustment requirements demands disciplined internal procedures, clear allocation of responsibilities, and timely coordination among TMC's internal teams and external advisors. We recommend the following compliance procedures and internal controls.

A. Annual Review Calendar

To ensure that TMC is prepared for each annual review, we recommend the following calendar of preparatory activities, keyed to the anticipated first annual review date of June 14, 2026, and repeating annually thereafter:

If EPA disagrees with TMC's proposed adjustment, the dispute resolution process described in Section IV.A is initiated, with informal negotiation commencing within 30 days of the dispute notice.

TMC should designate a single internal coordinator — we recommend Gareth Linford, as VP of Environmental Health & Safety — to serve as the process owner for the annual review and to ensure that all preparatory activities are completed on schedule. Calderwood & Harkness LLP will continue to serve as outside counsel for the annual review process and will coordinate with all external advisors and counterparties.

B. Documentation and Reporting Requirements

The consent decree imposes specific documentation and reporting requirements in connection with each annual review. TMC must prepare and submit the following documents:

1. Annual Financial Assurance Adequacy Certification. A written certification, signed by the CFO (Carolyn Bracebridge) and the VP EHS (Gareth Linford), confirming that the financial assurance amount is adequate to cover the estimated remaining remediation obligations at all four sites. If an adjustment is required, the certification must specify the new required amount and the proposed allocation between the surety bond and trust fund.

2. Updated Remediation Cost Estimates. Copies of the updated cost estimates prepared by Pinnacle Creek Environmental, with supporting methodological documentation and a narrative explanation of any significant changes from the prior year's estimates.

3. Ironbark Bond Endorsements or Riders. If the surety bond face amount is adjusted, copies of the bond rider or endorsement re

PRIVILEGED & CONFIDENTIAL — ATTORNEY-CLIENT PRIVILEGE / ATTORNEY WORK PRODUCT This memorandum was prepared by Calderwood & Harkness LLP at the request of and for the exclusive use of Torchlight Mining Corp. and its in-house legal counsel. It contains confidential attorney-client communications and attorney work product. This memorandum and the information contained herein should not be disclosed to any third party without the prior written consent of Calderwood & Harkness LLP and Torchlight Mining Corp. Disclosure to any third party may constitute a waiver of applicable privileges.
MEMORANDUM
TO: Miriam Soo-Hwan Park, General Counsel, Torchlight Mining Corp. Carolyn Bracebridge, Chief Financial Officer, Torchlight Mining Corp. Gareth Linford, Vice President, Environmental Health & Safety, Torchlight Mining Corp.
FROM: Harrison Wexford, Calderwood & Harkness LLP Elliot Nguyen, Calderwood & Harkness LLP Grace Nakamura, Calderwood & Harkness LLP
DATE: February 20, 2025
RE: Financial Assurance Adequacy and Annual Adjustment Mechanism — Consent Decree, Civil Action No. 9:24-cv-00087-DWM
MATTER NO.: 1039-00003
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I. Executive Summary
This memorandum analyzes whether the $245.0 million financial assurance package established under the consent decree entered in United States of America and State of Montana v. Torchlight Mining Corp. et al., Civil Action No. 9:24-cv-00087-DWM, is adequate to cover Torchlight Mining Corp.'s ("TMC") remediation obligations at all four sites subject to the decree. In addition, this memorandum explains in detail the annual adjustment mechanism that governs future changes to the financial assurance amounts, and addresses the interaction of these obligations with TMC's broader financial commitments, risk factors, and recommended internal compliance procedures.
The consent decree was filed in the United States District Court for the District of Montana, Missoula Division (Hon. Donald W. Molloy presiding), and requires TMC and its U.S. subsidiaries to maintain financial assurance in the aggregate amount of $245.0 million. This financial assurance is comprised of two instruments:
• A surety bond issued by Ironbark Surety of America, Inc. in the face amount of $165.0 million (Bond No. ISA-ENV-2025-08934); and
• A remediation trust fund held by Larchfield Trust Company, N.A. in the initial amount of $80.0 million (Trust Agreement No. LTC-REM-2025-1177, Trust Officer David Henshaw).
The consent decree mandates annual review and adjustment of financial assurance amounts, pegged to inflation indices (specifically, the Consumer Price Index for All Urban Consumers, or CPI-U) and updated remediation cost estimates prepared by TMC's environmental consultant and reviewed by the court-appointed independent monitor.
Our principal conclusion is as follows: The $245.0 million financial assurance package is adequate to cover the net present value ("NPV") of total remediation obligations, which we calculate at $245.1 million using a 3% discount rate. However, the financial assurance falls short of the total nominal remediation cost of $343.5 million and the grand total nominal obligation (including civil penalties, past-costs reimbursement, supplemental environmental projects, and independent monitor costs) of $409.9 million. The annual adjustment mechanism is specifically designed to bridge the gap between the initial financial assurance amount and escalating nominal remediation costs over time, accounting for cost escalation, remedy modifications, inflation, and actual remediation progress.
This memorandum sets forth our recommendations for TMC's internal financial planning and compliance procedures, including the establishment of an annual review working group, coordination with key advisors and counterparties, monitoring of credit facility covenant headroom, and contingency planning for identified risk factors such as surety market conditions, trust fund investment returns, cost escalation, and currency exposure.
II. Background — Consent Decree Financial Assurance Requirements
A. Statutory and Regulatory Framework
The financial assurance requirements applicable to TMC's remediation obligations arise under multiple federal environmental statutes and their implementing regulations, each of which imposes distinct requirements depending on the regulatory program under which the site is managed. We summarize the applicable frameworks below.
Resource Conservation and Recovery Act ("RCRA") Financial Assurance Requirements. Two of the four sites subject to the consent decree — the Gallatin Chemical Works facility (EPA Permit No. MTD098712456, located at 8800 Industrial Park Lane, Belgrade, Gallatin County, Montana 59714) and the Kanawha Bend Chemical Plant (EPA Permit No. WVD048823915, located at 2200 Chemical Valley Road, Institute, Kanawha County, West Virginia 25112) — are subject to RCRA financial assurance requirements codified at 40 C.F.R. Part 264, Subpart H. These regulations require owners and operators of hazardous waste treatment, storage, and disposal facilities to demonstrate financial assurance for the estimated cost of closure, post-closure care, and corrective action. The regulations prescribe specific mechanisms for satisfying these requirements and establish minimum standards for each instrument.
CERCLA § 107 Cost-Recovery Assurance Requirements. The Ridgecrest Copper-Molybdenum Mine (located at 14200 Ridgecrest Mine Road, Drummond, Granite County, Montana 59832) is subject to a proposed listing on the National Priorities List ("NPL") and is governed by an Administrative Order on Consent ("AOC"), Docket No. CERCLA-08-2022-0039. CERCLA § 107 authorizes the United States to recover response costs from responsible parties and, in the context of settlement agreements and consent decrees, to require financial assurance that the settling party will perform agreed-upon response actions. The financial assurance provisions in the consent decree with respect to Ridgecrest are negotiated terms that draw upon the general framework of RCRA financial assurance mechanisms but are tailored to the CERCLA cost-recovery and remediation context.
Clean Water Act ("CWA") Enforcement Context — Bonanza Creek Mine. The Bonanza Creek Gold Mine (located at County Road 447, Mile Marker 12, Lander County, Nevada 89820) is the subject of CWA enforcement action. Unlike RCRA, the CWA does not contain an express statutory mandate for financial assurance in connection with remediation or corrective action. Rather, the financial assurance obligation for the Bonanza Creek site was negotiated as a specific term of the consent decree, reflecting the parties' agreement that TMC would secure performance of its remediation and mitigation obligations at this site through the same financial assurance package applicable to the RCRA and CERCLA sites.
Acceptable Financial Assurance Instruments. Under 40 C.F.R. § 264.143, acceptable financial assurance mechanisms include: (1) surety bonds guaranteeing payment or performance; (2) trust funds; (3) irrevocable standby letters of credit; (4) environmental liability insurance policies; and (5) financial tests and corporate guarantees meeting specified financial criteria. The consent decree in this matter specifies that TMC's financial assurance shall consist exclusively of a surety bond and a remediation trust fund — the parties having agreed during negotiations that these two instruments, in combination, provide the most reliable and verifiable form of assurance given the scope and duration of the remediation obligations at issue. Letters of credit, insurance, and the financial test/corporate guarantee mechanism were considered during negotiations but were not accepted by the United States as primary instruments in this case, although certain of these may serve as replacement instruments under specific circumstances described in Section IV.E below.
B. Overview of the Four Sites and Remediation Costs
The consent decree encompasses remediation obligations at four geographically dispersed sites, each with distinct contaminant profiles, remediation technologies, and cost trajectories. The negotiated remediation cost for each site was developed through an iterative process involving TMC's internal estimates, EPA's independent cost estimates, and the assessments of TMC's environmental consultant, Pinnacle Creek Environmental, LLC ("Pinnacle Creek"). We summarize the sites and their respective remediation costs below.
1. Ridgecrest Copper-Molybdenum Mine (14200 Ridgecrest Mine Road, Drummond, Granite County, MT 59832). The Ridgecrest site is a former open-pit and underground copper-molybdenum mining operation that presents the most complex and costly remediation challenges among the four sites. Remediation activities include acid mine drainage treatment, tailings impoundment stabilization, contaminated groundwater extraction and treatment, surface water restoration, and ecological habitat reconstruction. The negotiated remediation cost is $198.6 million over a 30-year remediation period, yielding an NPV at a 3% discount rate of $134.9 million. This figure represents a compromise between TMC's initial estimate of $187.5 million and EPA's estimate of $224.0 million. The gap between the parties' estimates was attributable principally to differing assumptions regarding long-term acid mine drainage treatment costs, the expected useful life of water treatment infrastructure, and the scope of ecological restoration required to achieve performance standards.
2. Gallatin Chemical Works (8800 Industrial Park Lane, Belgrade, Gallatin County, MT 59714). The Gallatin site is a former chemical manufacturing facility requiring RCRA corrective action, including soil excavation and off-site disposal, groundwater pump-and-treat remediation, soil vapor extraction, and institutional controls. The remediation cost, per the Pinnacle Creek estimate accepted by the parties, is $42.8 million over a 15-year remediation period, yielding an NPV at a 3% discount rate of $34.1 million.
3. Bonanza Creek Gold Mine (County Road 447, Mile Marker 12, Lander County, NV 89820). The Bonanza Creek site is a former heap-leach gold mining operation requiring heap-leach pad closure, process solution neutralization and treatment, surface water and groundwater remediation, and revegetation. The remediation cost, per the Pinnacle Creek estimate, is $63.2 million over a 20-year remediation period, yielding an NPV at a 3% discount rate of $47.1 million.
4. Kanawha Bend Chemical Plant (2200 Chemical Valley Road, Institute, Kanawha County, WV 25112). The Kanawha Bend site is a former specialty chemical manufacturing plant requiring RCRA corrective action, including soil and sediment remediation, groundwater treatment, off-site migration containment, and long-term monitoring. The remediation cost, per the Pinnacle Creek estimate, is $38.9 million over a 20-year remediation period, yielding an NPV at a 3% discount rate of $29.0 million.
The following table summarizes the remediation cost estimates for all four sites:
C. Non-Remediation Obligations (Not Covered by Financial Assurance)
The consent decree imposes several categories of financial obligations on TMC beyond the remediation costs discussed above. Critically, these non-remediation obligations are not secured by the financial assurance package — the $245.0 million financial assurance is designed exclusively to secure the performance of remediation obligations at the four sites. The non-remediation obligations are summarized below.
Civil Penalties. TMC is obligated to pay civil penalties totaling $31.5 million, allocated among the four sites as follows: Ridgecrest — $14.2 million; Gallatin — $5.8 million; Bonanza Creek — $7.9 million; and Kanawha Bend — $3.6 million. The civil penalties are payable in four equal quarterly installments of $7.875 million each, commencing 30 days after the Effective Date of the consent decree (currently anticipated to be July 14, 2025, assuming an Effective Date of June 14, 2025). Interest accrues on unpaid penalties at the rate specified in 28 U.S.C. § 1961.
EPA Past-Costs Reimbursement. Under CERCLA § 107, TMC is obligated to reimburse EPA for past response costs totaling $18.1 million, comprising $14.3 million attributable to the Ridgecrest site and $3.8 million attributable to the Kanawha Bend site. These amounts are payable within 60 days after the Effective Date.
Supplemental Environmental Projects ("SEPs"). TMC has committed to fund three supplemental environmental projects totaling $12.0 million: (1) the Flint Creek Watershed Restoration Project ($5.5 million), which will address legacy mining impacts in the Flint Creek watershed in Granite County, Montana; (2) the Battle Mountain Community Drinking Water Improvement Project ($3.5 million), which will upgrade municipal drinking water treatment infrastructure in Battle Mountain, Lander County, Nevada; and (3) the Institute Community Air Quality Monitoring Network ($3.0 million), which will establish a community-based air quality monitoring system in the Institute area of Kanawha County, West Virginia. Completion deadlines for each SEP are specified in the consent decree.
Independent Monitor Costs. The consent decree provides for the appointment of Verdant Analytics, Inc. (Dr. Kamal Osei, Senior Managing Director) as an independent monitor to conduct quarterly compliance audits and annual reporting on TMC's remediation performance. The estimated cost of the independent monitor over the initial five-year monitoring period is $4.8 million (approximately $960,000 per year). TMC is responsible for all costs of the independent monitor.
The following table summarizes TMC's total financial obligations under the consent decree:
The financial assurance amount of $245.0 million is designed to secure the remediation obligations specifically. The penalty, past-costs, SEP, and monitoring obligations represent separate payment obligations that TMC must satisfy from its general corporate funds. TMC should ensure that its cash flow planning and budgeting process accounts for all categories of consent decree obligations, not merely those secured by financial assurance.
III. Structure of the Current Financial Assurance Package
A. Surety Bond — Ironbark Surety of America, Inc.
The primary component of TMC's financial assurance package is a surety bond issued by Ironbark Surety of America, Inc. The material terms and characteristics of this bond are as follows:
Bond Number: ISA-ENV-2025-08934
Face Amount: $165.0 million
Issuer: Ironbark Surety of America, Inc., a New York-domiciled insurance company, with its principal office at 599 Lexington Avenue, 26th Floor, New York, New York 10022. Ironbark Surety of America is a wholly-owned subsidiary of Ironbark Surety Group, Ltd., a Bermuda-domiciled insurance holding company. The account executive responsible for the TMC relationship is Thomas Rennick.
Annual Premium: The annual premium for the surety bond is 1.85% of the face value, equaling $3,052,500 per year ($3.0525 million). The premium is payable annually in advance on the anniversary date of bond issuance. This premium rate was negotiated in the context of TMC's current credit profile and reflects market conditions prevailing at the time of bond issuance. The premium rate is subject to renegotiation upon material changes in TMC's creditworthiness or prevailing surety market conditions, as discussed further in Section IV.E.
Obligee: The United States Environmental Protection Agency ("EPA"), acting on behalf of the United States, and the co-plaintiff states (State of Montana, State of Nevada, and State of West Virginia).
Principal: Torchlight Mining Corp. and its U.S. subsidiaries, specifically: Torchlight Mining (U.S.) Inc., Torchlight Specialty Chemicals, Inc., Ridgecrest Mine Holdings, LLC, and Bonanza Creek Mining, LLC (collectively, the "TMC Entities"). All TMC Entities are jointly and severally liable under the bond.
Bond Term: The surety bond is a continuous bond, meaning it does not have a fixed expiration date but remains in force indefinitely, subject to annual renewal provisions and the adjustment mechanisms described in Section IV. The bond is non-cancellable except upon 120 days' advance written notice to EPA, DOJ, all co-plaintiff states, and the Court. This extended notice period — significantly longer than the 90-day notice period that is typical for environmental surety bonds — was a specifically negotiated term of the consent decree, designed to provide TMC and the government parties with adequate time to arrange replacement assurance in the event of cancellation.
Indemnity Agreement: In connection with the issuance of the surety bond, TMC has executed a General Agreement of Indemnity ("GAI") in favor of Ironbark, pursuant to which TMC (at the parent-company level) and all U.S. subsidiaries jointly and severally indemnify Ironbark for any losses, costs, or expenses incurred in connection with the bond. Under the terms of the GAI, Ironbark may require TMC to post collateral (in the form of cash, letters of credit, or pledges of assets) in the event of a material adverse change in TMC's financial condition or creditworthiness. The collateral trigger provisions are defined by reference to specified financial metrics, including leverage ratios and credit rating thresholds.
It is important to note that the indemnity agreement constitutes a contingent obligation of TMC that may implicate negative covenants regarding liens and permitted indebtedness under TMC's syndicated revolving credit facility with Harborstone National Bank, N.A. This interaction is discussed further in Section V.A below.
B. Remediation Trust Fund — Larchfield Trust Company, N.A.
The second component of TMC's financial assurance package is a remediation trust fund established with Larchfield Trust Company, N.A. The material terms and characteristics of this trust are as follows:
Trust Agreement Number: LTC-REM-2025-1177
Trustee: Larchfield Trust Company, N.A., a nationally chartered trust company, with its principal office at 200 South Tryon Street, Suite 1100, Charlotte, North Carolina 28202. The designated trust officer for this account is David Henshaw.
Initial Deposit: TMC is required to deposit $80.0 million into the remediation trust fund. This initial deposit is due by September 12, 2025, which is 90 days after the anticipated Effective Date of the consent decree (June 14, 2025). The deposit may be made in a single lump sum or in installments, provided that the full $80.0 million is on deposit no later than the September 12 deadline. TMC's current intention, as communicated by CFO Carolyn Bracebridge, is to fund the initial deposit in a single wire transfer from TMC's primary operating account at Harborstone National Bank.
Grantor: Torchlight Mining Corp.
Beneficiary: The United States Environmental Protection Agency, acting on behalf of the United States. The trust is irrevocable during the term of the consent decree, and the trust corpus may not be returned to TMC or applied to any purpose other than the remediation obligations at the four sites, except upon termination of the trust as described below.
Investment Guidelines: The trust agreement contains strict investment limitations designed to preserve the trust corpus and minimize investment risk. The trust corpus is required to be invested exclusively in: (i) direct obligations of the United States Treasury (including Treasury bills, notes, and bonds); (ii) obligations of United States government agencies or government-sponsored enterprises that are backed by the full faith and credit of the United States; or (iii) money market funds that invest exclusively in the foregoing categories of instruments. No equity securities, corporate debt obligations, municipal bonds, or alternative investments of any kind are permitted. These restrictions reflect the consent decree's emphasis on capital preservation over return maximization, which is consistent with standard practice for environmental remediation trust funds under RCRA and CERCLA.
Disbursement Procedures: Trust fund disbursements may be made solely for the purpose of paying documented remediation costs at the four consent decree sites. All disbursements require prior written approval from EPA (or from the EPA Project Coordinator for individual disbursement requests under $500,000). TMC must submit quarterly disbursement requests to EPA, accompanied by supporting documentation including invoices, contractor certifications, and progress reports. EPA has 30 days to approve or deny a disbursement request. Denied requests may be appealed through the consent decree's dispute resolution mechanism.
Treatment of Trust Income: All investment income earned by the trust fund — including interest, dividends, and capital gains — is reinvested in the trust corpus and is treated as part of the financial assurance amount for purposes of the annual adequacy calculations described in Section IV. This means that as the trust corpus grows through investment returns, the effective financial assurance amount increases correspondingly, potentially reducing or eliminating the need for supplemental deposits in connection with annual adjustments.
Tax Treatment: The remediation trust fund is structured as a qualified settlement fund ("QSF") under Internal Revenue Code § 468B and the regulations promulgated thereunder. As a QSF, the trust fund is a separate taxpaying entity, subject to federal income tax on its investment income at the rate applicable to trusts and estates. TMC is responsible for all trustee fees associated with the administration of the trust, which are estimated at 0.10% to 0.15% of the trust corpus on an annual basis (i.e., approximately $80,000 to $120,000 per year based on the initial $80.0 million deposit, with fees increasing as the corpus grows through additional deposits or investment returns).
Trust Termination: The trust will terminate upon: (i) EPA's certification that all remediation obligations at all four sites have been completed and all performance standards have been achieved; and (ii) entry of an order by the Court terminating the consent decree. Upon termination of the trust, any residual trust funds (i.e., corpus and accumulated investment income remaining after satisfaction of all remediation costs and trustee fees) will be returned to TMC as the grantor.
C. Aggregate Financial Assurance Coverage Analysis
Combining the two instruments, TMC's total financial assurance package at inception is valued at $245.0 million, consisting of the $165.0 million Ironbark surety bond and the $80.0 million Larchfield remediation trust fund. We assess the adequacy of this package against TMC's remediation obligations on both an NPV basis and a nominal basis.
NPV Basis. The total NPV of TMC's remediation obligations across all four sites, discounted at 3%, is $245.1 million. The coverage ratio on an NPV basis is therefore:
$245.0M ÷ $245.1M = 99.96%
This represents essentially full coverage of remediation obligations on a present-value basis. The marginal shortfall of $0.1 million (approximately $100,000) is de minimis and well within the margin of error inherent in the underlying cost estimates.
Nominal Basis. The total nominal remediation cost across all four sites is $343.5 million. The coverage ratio on a nominal basis is:
$245.0M ÷ $343.5M = 71.3%
The gap between the nominal remediation cost and the financial assurance amount is $98.5 million. This gap is not, however, a deficiency in the financial assurance structure. Rather, it reflects the fundamental principle underlying environmental financial assurance: because remediation expenditures are phased over decades (up to 30 years in the case of the Ridgecrest site), it is not necessary — and regulatory practice does not require — that the full nominal cost of remediation be secured at inception. The gap between nominal cost and initial financial assurance is expected to be covered by: (i) investment returns generated by the trust fund corpus over the remediation period; (ii) annual upward adjustments to the financial assurance amount through the CPI-U inflation indexing mechanism; and (iii) additional deposits and bond increases as required by updated remediation cost estimates.
The consent decree's annual adjustment mechanism, discussed in detail in Section IV, is the primary tool by which financial assurance adequacy is maintained over time.
IV. Annual Adjustment Mechanism
A. Overview of the Consent Decree Adjustment Provision
The consent decree recognizes that a static financial assurance amount established at the time of decree entry will inevitably become inadequate over a multi-decade remediation period due to inflation, changes in remediation scope or technology, and evolving regulatory requirements. Accordingly, the decree mandates an annual review of the financial assurance amount and, where warranted, upward or downward adjustment to maintain adequacy relative to remaining remediation obligations.
The first annual review is required to be completed within 12 months of the Effective Date of the consent decree — i.e., by June 14, 2026 (assuming the Effective Date is June 14, 2025). Subsequent annual reviews are required on each anniversary of the Effective Date thereafter, continuing until the consent decree is terminated. In practical terms, this means that the annual review process will recur for the duration of the remediation program, which extends up to 30 years for the Ridgecrest site.
The annual adjustment determination is made jointly by TMC and EPA. The consent decree contemplates a collaborative process in which TMC submits proposed adjustments (or a confirmation that no adjustment is warranted) to EPA, and EPA either concurs or proposes alternative adjustments. If the parties agree, the adjustment becomes effective 30 days after the date of agreement and is memorialized in a written stipulation filed with the Court.
If the parties are unable to reach agreement on the appropriate adjustment, the consent decree provides a three-tier dispute resolution mechanism:
Tier 1 — Informal Negotiation. TMC and EPA engage in informal negotiations for a period of 30 days following written notice of the dispute. During this period, designated representatives of TMC (the VP EHS or designee) and EPA (the Project Coordinator or designee) meet and confer in good faith to attempt resolution.
Tier 2 — Formal EPA Decision. If the dispute is not resolved through informal negotiation, EPA issues a formal written decision on the disputed adjustment within 30 days following the conclusion of the informal negotiation period. The formal decision must set forth EPA's rationale, including any reliance on updated cost estimates, regulatory requirements, or other relevant factors.
Tier 3 — Judicial Review. TMC may seek judicial review of EPA's formal decision by filing a motion with the Court within 30 days after receipt of EPA's decision. The Court reviews EPA's decision under an arbitrary and capricious standard with respect to matters within EPA's expertise (e.g., remedy scope and cost), and de novo with respect to legal questions (e.g., interpretation of consent decree provisions).
Given the potential for annual reviews to involve substantial sums and the complexity of the underlying cost estimates, TMC should be prepared to engage in the dispute resolution process if EPA's proposed adjustments materially differ from TMC's assessments. However, TMC should also be mindful that the dispute resolution process is time-consuming and resource-intensive, and that a cooperative relationship with EPA will generally yield more favorable outcomes over the long term.
B. Inflation Indexing
The consent decree pegs the minimum annual adjustment of the financial assurance amount to the Consumer Price Index for All Urban Consumers ("CPI-U"), as published by the U.S. Bureau of Labor Statistics. The CPI-U is a broadly recognized measure of economy-wide inflation and is commonly used as a baseline index for financial assurance adjustment provisions in environmental consent decrees and administrative orders.
The annual inflation adjustment operates as follows: the total required financial assurance amount is increased (or decreased, in the event of deflation) by the percentage change in CPI-U from the 12-month period preceding each annual review date. For illustrative purposes:
If CPI-U increases by 3.2% in the 12-month period preceding the first annual review (June 14, 2026), the required financial assurance amount would increase from $245.0 million to:
$245.0M × 1.032 = $252.84 million
This would represent an increase of $7.84 million from the initial financial assurance amount.
It is critical to understand that the CPI-U adjustment serves as a floor, not a ceiling. The consent decree expressly provides that actual adjustments may exceed the CPI-U factor if updated remediation cost estimates warrant a larger increase. In other words, the CPI-U adjustment ensures that the financial assurance amount keeps pace with general inflation at a minimum, but the annual review process may result in larger adjustments based on site-specific cost developments.
Conversely, in the unlikely event that CPI-U declines (i.e., a deflationary period), the financial assurance amount could theoretically be reduced by the CPI-U decrease, although any such reduction would remain subject to the other adequacy requirements discussed below and to the negotiated floor of $50.0 million.
When an increase to the total financial assurance amount is required, TMC must allocate the increase between the surety bond and the trust fund. The consent decree provides that this allocation should be made in consultation with EPA. If TMC and EPA are unable to agree on the allocation, the increase is allocated pro rata based on the original proportional split between the two instruments:
• Surety bond share: $165.0M ÷ $245.0M = 67.35%
• Trust fund share: $80.0M ÷ $245.0M = 32.65%
Applying the pro rata allocation to the illustrative $7.84 million increase described above, the surety bond face amount would increase by approximately $5.28 million (to $170.28 million), and the trust fund would require an additional deposit of approximately $2.56 million (bringing the required trust fund balance to $82.56 million, subject to adjustment for accumulated investment income).
C. Updated Remediation Cost Estimates
In addition to the inflation indexing mechanism, the consent decree requires TMC to submit updated remediation cost estimates at each annual review. These updated estimates are a critical component of the adjustment process because they capture changes in remediation costs that may not be reflected in the general CPI-U inflation index — including changes in remedy scope, design modifications, site-specific cost developments, and regulatory changes.
The updated cost estimates are required to be prepared by Pinnacle Creek Environmental, LLC, TMC's environmental consultant of record under the consent decree. The Pinnacle Creek engagement is led by Dr. Astrid Bergmann, P.E., Senior Principal, located at 320 Willowbrook Drive, Suite 100, Bozeman, Montana 59715. Pinnacle Creek has served as TMC's primary environmental consulting firm for remediation cost estimation since the inception of the enforcement proceedings and possesses detailed familiarity with all four sites.
The consent decree specifies that the updated cost estimates must reflect the following factors:
(i) Actual remediation expenditures incurred to date. The updated estimate must account for all remediation costs that have been incurred and paid since the prior estimate, reflecting the reduction in remaining remediation obligations.
(ii) Changes in remedy scope or design. If the approved remedy at any site has been modified — whether through EPA-approved changes, performance-based adjustments, or court orders — the updated estimate must reflect the cost implications of such modifications.
(iii) Changes in unit costs for labor, materials, and equipment. The updated estimate must incorporate current market pricing for key remediation inputs, including construction labor, earthmoving equipment, chemical reagents, monitoring instrumentation, and waste transportation and disposal services.
(iv) Changes in regulatory requirements. If applicable environmental standards have been revised (e.g., more stringent water quality criteria, updated risk-based cleanup levels, or new air emission standards), the updated estimate must reflect the cost of compliance with revised requirements.
(v) Any modifications approved by EPA or ordered by the Court. This catch-all provision ensures that the updated estimate captures all consent-decree-related changes, including modifications to schedules, milestones, and performance standards.
The updated cost estimates prepared by Pinnacle Creek are subject to independent review by Verdant Analytics, Inc. (Dr. Kamal Osei, Senior Managing Director, 1550 NW Couch Street, Suite 400, Portland, Oregon 97209), the court-appointed independent monitor. Verdant Analytics reviews the updated cost estimates as part of its quarterly compliance audit and annual reporting process, and provides an independent assessment to EPA. If Verdant identifies material discrepancies between Pinnacle Creek's estimates and its own independent assessment, Verdant may recommend that EPA require additional adjustments to the financial assurance amount.
In addition, Cascade Geosciences, Inc. (Dr. Patricia Voss, Principal, 804 Salmon Bay Drive, Seattle, Washington 98107), which serves as the government's technical expert, may review and comment on the updated cost estimates on behalf of EPA. Cascade Geosciences has provided technical consulting services to EPA Region 8 throughout the enforcement proceedings and has independent access to site data, monitoring results, and remedy performance information.
If the updated cost estimate for any individual site exceeds the prior year's estimate by more than 10%, the consent decree imposes an additional procedural requirement: TMC must provide a detailed written explanation of the factors driving the cost increase, and may be required to increase the financial assurance amount beyond the CPI-U adjustment to cover the incremental cost. This 10% threshold serves as an early warning mechanism to ensure that significant cost escalation is identified and addressed promptly, rather than accumulating unnoticed over multiple review periods.
D. Downward Adjustments and Credits
The annual adjustment mechanism is not exclusively upward. The consent decree also provides for downward adjustments to the financial assurance amount as remediation milestones are achieved and verified. The downward adjustment provisions serve two important functions: they incentivize timely and effective remediation performance by TMC, and they ensure that the financial assurance amount remains appropriately calibrated to actual remaining obligations rather than inflated by obligations that have already been satisfied.
Milestone-Based Reductions. The consent decree permits site-by-site reductions in the financial assurance amount upon the achievement and certification of specified remediation milestones. Specifically, once EPA certifies that all remedial construction at a given site is complete and that performance standards are being met, the financial assurance attributable to that site may be reduced to cover only the estimated costs of long-term monitoring and maintenance at that site. This represents a potentially significant reduction, as long-term monitoring and maintenance costs are typically a fraction of total remediation costs.
For example, if EPA certifies that remedial construction at the Gallatin Chemical Works is complete and performance standards are being met, the financial assurance attributable to Gallatin could potentially be reduced from $34.1 million (its initial NPV allocation) to an amount reflecting only the estimated long-term monitoring costs, which might be on the order of $5.0–$8.0 million depending on the monitoring program requirements.
Credit for Actual Remediation Expenditures. Documented remediation expenditures by TMC that have been approved by EPA are credited against the remaining remediation obligation, proportionally reducing the required financial assurance amount. This credit mechanism ensures that as TMC actually performs and pays for remediation work, the financial assurance requirement declines in tandem with the declining remaining obligation.
Minimum Floor. The consent decree establishes an absolute floor below which the total financial assurance amount may not be reduced, regardless of the progress of remediation. Specifically, no reduction may bring the total financial assurance below the greater of:
(i) the remaining estimated remediation cost (on an NPV basis) for all sites combined; or
(ii) $50.0 million.
The $50.0 million floor was a specifically negotiated term of the consent decree, reflecting the United States' insistence on maintaining a minimum level of financial assurance throughout the decree term to guard against unforeseen cost increases, remedy failures, or changes in site conditions that could give rise to additional remediation obligations.
Procedural Requirements for Downward Adjustments. TMC must submit any request for a downward adjustment in writing, accompanied by EPA-certified completion documentation for the relevant remediation milestones. EPA has 60 days to review and approve or deny a downward adjustment request. If EPA denies the request, the matter may be escalated through the three-tier dispute resolution mechanism described in Section IV.A. Given the procedural complexity and the 60-day EPA review period, TMC should plan downward adjustment requests well in advance of the annual review date to ensure that any approved reductions can be incorporated into the annual adjustment determination.
E. Surety Bond Renewal and Adjustment Procedures
The Ironbark surety bond (Bond No. ISA-ENV-2025-08934) is structured as a continuous bond, meaning that it does not require annual renewal in the traditional sense. However, the bond is subject to annual premium recalculation and face-amount adjustments in connection with the consent decree's annual review process.
Upward Adjustments. If the annual review results in an increase to the required financial assurance amount, and all or part of that increase is allocated to the surety bond component, TMC must obtain a bond rider or endorsement from Ironbark increasing the face amount of the bond to the adjusted level. TMC has 60 days from the date of the adjustment determination to obtain and deliver the rider or endorsement to EPA. TMC should coordinate with Thomas Rennick at Ironbark well in advance of the annual review date to ensure that the underwriting process for any required increase can be completed within the 60-day window.
Premium Recalculation. When the face amount of the bond is adjusted, the annual premium is recalculated by applying the bond rate (currently 1.85%) to the adjusted face amount. For example, if the bond face amount is increased from $165.0 million to $170.28 million, the new annual premium would be $170.28M × 0.0185 = $3,150,180 (an increase of approximately $97,680 from the current premium of $3,052,500). The premium rate itself is subject to renegotiation upon material credit deterioration, adverse changes in surety market conditions, or other factors that materially affect the risk profile of the bond from Ironbark's perspective.
Cancellation and Replacement. If Ironbark declines to increase the bond amount to the required level, or if Ironbark elects to cancel the bond (which requires 120 days' advance written notice to EPA and the Court), TMC must obtain a replacement bond from a qualified surety or substitute an alternative financial assurance instrument within the 120-day notice period. Acceptable alternative instruments include: (i) a replacement surety bond from another qualified surety; (ii) an additional deposit to the Larchfield remediation trust fund sufficient to cover the surety bond's portion of the financial assurance requirement; (iii) an irrevocable standby letter of credit from a qualified financial institution; or (iv) a corporate guarantee from TMC's parent company, if EPA agrees to accept such an instrument (which EPA is not required to do under the consent decree).
TMC is required to notify EPA, DOJ, and the Court within 10 business days of receiving any notice of cancellation or non-renewal from Ironbark. Prompt notification is essential to preserve TMC's compliance with the consent decree and to initiate the process of arranging replacement assurance.
Ironbark Financial Strength Requirements. The consent decree requires that the surety issuing the bond maintain a minimum financial strength rating of A- (Excellent) or equivalent from a nationally recognized rating agency. Ironbark Surety Group, Ltd. (the parent company of Ironbark Surety of America) is currently rated A (Excellent), which satisfies this requirement with a one-notch cushion. If Ironbark is downgraded below the A- threshold, TMC must either: (i) obtain a replacement bond from a surety that meets the minimum rating requirement; or (ii) provide supplemental financial assurance in another acceptable form. TMC has 90 days from the effective date of a downgrade to complete the replacement or supplementation.
F. Trust Fund Adjustment Procedures
If the annual review results in an increase to the required financial assurance amount, and all or part of that increase is allocated to the trust fund component, TMC must make an additional deposit to the Larchfield Trust Company, N.A. remediation trust fund within 60 days of the adjustment determination.
Importantly, trust fund investment returns are credited toward the required amount. If the trust corpus — including the original deposit and all accumulated investment income — equals or exceeds the allocated trust fund portion of the required financial assurance amount, no additional deposit is required for that component. This feature provides a natural mechanism by which the trust fund can grow organically over time to absorb a portion of the annual inflation adjustments, reducing the need for out-of-pocket supplemental deposits by TMC.
However, if trust fund investment returns are insufficient — for example, due to a prolonged period of low interest rates, or if real returns (i.e., nominal returns minus inflation) are negative — TMC must make supplemental deposits to maintain the trust fund at the required level. This risk is discussed further in Section VI.C.
The trustee, David Henshaw at Larchfield Trust Company, N.A., provides quarterly statements of the trust fund value (including both the principal corpus and accumulated investment income) to TMC, EPA, and the Court. These quarterly statements enable all parties to track the trust fund's performance relative to the required amount on an ongoing basis.
In addition, the trustee provides an annual certification of the trust fund balance as of the anniversary of the Effective Date. This annual certification must be submitted to EPA within 30 days of the anniversary date and serves as the basis for the trust fund component of the annual adequacy review. TMC should coordinate with David Henshaw to ensure that the annual certification is prepared and delivered in a timely manner, as delays in the trustee's certification could impede the annual review process.
V. Interaction with TMC's Broader Financial Obligations
The consent decree's financial assurance requirements do not exist in isolation. TMC's ability to maintain and adjust its financial assurance package over time must be assessed in the context of TMC's broader financial obligations, credit agreements, accounting requirements, and insurance programs. We address each of these interactions below.
A. Harborstone RCF Environmental Covenant
TMC's principal credit facility is a C$750.0 million syndicated revolving credit facility (the "RCF") with Harborstone National Bank, N.A. serving as administrative agent. The RCF matures on March 15, 2027, and contains a comprehensive set of financial covenants and negative covenants.
Of particular relevance to the financial assurance analysis is the RCF's environmental liability covenant, which requires that TMC's aggregate disclosed and undisclosed environmental liabilities not exceed 25% of consolidated net tangible assets ("CNTA"). As of Q3 2024, TMC reported CNTA of C$3.92 billion, yielding a 25% threshold of C$980.0 million (approximately US$724.4 million at the prevailing exchange rate of C$1 = US$0.7394).
TMC's current total environmental liabilities — including all consent decree obligations (remediation costs, penalties, past-costs reimbursement, SEPs, and monitor costs) — are approximately US$409.9 million, or approximately C$554.4 million at the current exchange rate. This yields covenant headroom of:
C$980.0M – C$554.4M = C$425.6 million (approximately US$314.7 million)
While TMC presently has substantial headroom under the environmental liability covenant, annual adjustments to the financial assurance amount that increase TMC's total environmental liability could erode covenant headroom over time. This is particularly concerning in a scenario where remediation cost estimates increase significantly beyond the CPI-U adjustment, or where TMC's CNTA declines due to asset impairments or other factors. TMC should monitor the interaction between financial assurance adjustments and RCF covenant compliance at each annual review, and should promptly notify Harborstone of any material changes in environmental liabilities.
In addition, the Ironbark surety bond indemnity agreement constitutes a contingent obligation of TMC — specifically, a contingent obligation to reimburse Ironbark for any losses incurred under the bond, secured by TMC's general corporate credit and potentially by pledged collateral. This contingent obligation may implicate the RCF's negative covenants regarding liens and permitted indebtedness. TMC should coordinate with Northspire Capital Markets, Inc. (Vivian Okafor, Managing Director, Liability & Risk Advisory, 277 Park Avenue, 40th Floor, New York, New York 10172) on ongoing compliance monitoring to ensure that the indemnity agreement does not create an event of default under the RCF. If necessary, TMC should seek a waiver or amendment from Harborstone to expressly exclude the Ironbark indemnity from the scope of the negative covenants.
B. Environmental Reserve Adequacy
TMC's environmental remediation reserve, as reported in its Q3 2024 financial statements, stands at C$340.0 million (approximately US$251.4 million). This reserve is established in accordance with ASC 450 (Accounting for Contingencies) under U.S. GAAP and IAS 37 (Provisions, Contingent Liabilities and Contingent Assets) under IFRS.
When compared to the total nominal grand total obligation of US$409.9 million, the reserve reflects a shortfall of approximately US$158.5 million. This shortfall requires careful analysis and documentation, as it represents the difference between the amount accrued on TMC's balance sheet and the total estimated obligation. A portion of the shortfall may be attributable to the fact that certain obligations (e.g., future-year remediation costs and inflation escalation) are recorded on a discounted or probability-weighted basis under the applicable accounting standards, while the nominal total obligation represents an undiscounted aggregate. TMC's external auditors and accounting advisors should confirm that the reserve methodology is appropriate and adequately disclosed.
Annual adjustments to the financial assurance amount that increase total remediation cost estimates will, in most cases, require corresponding increases to the accounting reserve under ASC 450 and IAS 37. TMC should coordinate with Ridgeline Accounting Partners LLP (Frances Whitmore, CPA, CA, engagement partner) to ensure that updated cost estimates from each annual review are promptly communicated to the audit team for incorporation into the financial statements, including the remediation reserve balance and related financial statement footnote disclosures. CFO Carolyn Bracebridge should establish an internal process to ensure that updated cost estimates from annual reviews are transmitted to the audit team within 15 business days of receipt, to allow adequate time for analysis and reserve adjustment before each fiscal year-end.
C. Insurance Recovery Considerations
TMC maintains a pollution legal liability ("PLL") insurance policy with Meridian Environmental Insurance Company (Policy No. MEI-ENV-2021-04738). The policy provides a per-occurrence limit of $50.0 million and an aggregate limit of $75.0 million, subject to a self-insured retention ("SIR") of $5.0 million per occurrence.
Coverage under the Meridian policy has been acknowledged for the Gallatin Chemical Works and Bonanza Creek Gold Mine sites, and has been denied for the Ridgecrest Copper-Molybdenum Mine and Kanawha Bend Chemical Plant sites. The coverage denials for Ridgecrest and Kanawha Bend are based on policy exclusions for pre-existing known contamination and regulatory enforcement actions predating the policy inception date. TMC's coverage counsel is evaluating the denials, but the prospects for reversal appear limited based on our current assessment.
For the covered sites (Gallatin and Bonanza Creek), Northspire Capital Markets estimates potential insurance recoveries in the range of $45.0–$55.0 million (net of the SIR), with a maximum theoretical recovery of $75.0 million (the aggregate policy limit). The precise recovery amount will depend on the timing and documentation of covered remediation expenditures, the application of deductibles and retentions, and the outcome of any coverage disputes with Meridian.
It is important to emphasize that potential insurance recoveries do not reduce the required financial assurance amount under the consent decree. The financial assurance is a separate and independent obligation that must be maintained regardless of whether TMC receives insurance proceeds. The financial assurance exists to guarantee performance of remediation obligations to EPA and the co-plaintiff states, whereas insurance recoveries are a private-party contractual right that benefits TMC's bottom line.
However, if insurance recoveries are received and applied to actual remediation costs at the covered sites, they would be credited against actual remediation expenditures, potentially enabling earlier downward adjustment of the financial assurance attributable to those sites. TMC should track and document all insurance recoveries carefully, and should submit them as part of the annual review process to support downward adjustment requests.
VI. Risk Factors and Contingencies
TMC's financial assurance obligations are subject to several risk factors and contingencies that could affect the cost, availability, and adequacy of the financial assurance package over the multi-decade term of the consent decree. We identify and assess the principal risk factors below.
A. Remedy Cost Escalation Risk
The most significant risk factor affecting the adequacy of TMC's financial assurance is the potential for remediation costs to escalate beyond the levels projected in the current cost estimates. This risk is most acute at the Ridgecrest Copper-Molybdenum Mine, where the 30-year remediation timeline creates substantial cost uncertainty. The principal drivers of cost escalation risk include:
Construction Cost Inflation. Historical data on mining site remediation indicates that construction cost inflation in the mining remediation sector has averaged 3–5% annually over the past two decades. This rate of cost escalation has frequently exceeded the general CPI-U inflation rate, which has averaged approximately 2.5% over the same period. To the extent that remediation-specific cost inflation outpaces CPI-U, the consent decree's inflation indexing mechanism may understate the actual increase in remediation costs, resulting in a gradual erosion of financial assurance adequacy.
Regulatory Changes. Revisions to applicable environmental standards — including more stringent water quality criteria for receiving streams, lower cleanup levels for contaminants of concern, or new technology-based treatment requirements — could significantly expand the scope and cost of remediation at one or more of the four sites. For example, EPA is currently evaluating potential revisions to ambient water quality criteria for copper and molybdenum, which could affect the Ridgecrest site's performance standards and treatment system design.
Climate Variability. Climate change and increased climate variability present operational risks to remediation programs at the Ridgecrest and Bonanza Creek sites. At Ridgecrest, changes in precipitation patterns and snowmelt timing could affect acid mine drainage volumes, potentially requiring expanded water treatment capacity. At Bonanza Creek, changes in evapotranspiration rates and extreme precipitation events could affect heap-leach pad management and stormwater controls. These climate-related factors are inherently difficult to predict and could result in substantial cost increases that are not captured in current cost estimates.
B. Surety Market Risk
TMC's ability to maintain the Ironbark surety bond over the term of the consent decree depends on both TMC's creditworthiness and conditions in the environmental surety market. The principal surety market risk factors include:
Premium Rate Risk. The current annual premium of $3.0525 million (1.85% of face value) reflects current market pricing and TMC's current credit profile. Tightening of the environmental surety market — driven by increased demand for environmental surety bonds, reduced surety capacity, or broader reinsurance market pressures — could result in significantly higher premium rates upon renegotiation. Premium increases of 25–50 basis points (i.e., to 2.10–2.35%) are plausible under stress scenarios, which would increase the annual premium cost by $412,500 to $825,000.
Collateral Demands. Under the terms of the General Agreement of Indemnity, Ironbark may require TMC to post collateral if TMC's financial condition deteriorates materially. TMC's EBITDA for fiscal year 2023 was C$1.14 billion; a significant decline below this level could trigger collateral demands from Ironbark, diverting cash or encumbering assets that would otherwise be available for operations or capital expenditures.
Market Capitalization. TMC's current market capitalization is approximately C$7.6 billion. A significant decline in market capitalization — whether driven by commodity price volatility, operational issues, or broader market conditions — could affect TMC's surety capacity and the willingness of sureties to issue or maintain bonds of this magnitude.
C. Trust Fund Investment Risk
The remediation trust fund's ability to contribute to long-term financial assurance adequacy depends on the investment returns generated by the trust corpus. The consent decree's restrictive investment guidelines — limiting the trust to U.S. Treasury obligations and equivalent instruments — minimize credit risk and liquidity risk but also limit return potential. The principal investment risk factors include:
Real Return Risk. In high-inflation environments, the nominal return on U.S. Treasury obligations may be lower than the CPI-U inflation rate, resulting in negative real returns on the trust corpus. In such a scenario, the trust fund's purchasing power declines over time, and TMC will be required to make supplemental deposits to maintain the required financial assurance level. For example, if the trust fund earns a nominal return of 3.5% per year but CPI-U inflation is 4.5% per year, the trust fund's real return is -1.0%, requiring approximately $800,000 per year in supplemental deposits to maintain a real value of $80.0 million.
Trustee Fee Drag. The estimated trustee fees of 0.10–0.15% of the trust corpus reduce the effective investment return. While modest in absolute terms (approximately $80,000–$120,000 per year based on the initial $80.0 million corpus), these fees compound over time and contribute to the overall drag on trust fund performance.
D. Currency Risk
TMC reports its financial results in Canadian dollars, while the financial assurance obligations under the consent decree are denominated in U.S. dollars. The current exchange rate of C$1 = US$0.7394 means that the C$-equivalent cost of maintaining US$245.0 million in financial assurance is approximately C$331.3 million. Fluctuations in the CAD/USD exchange rate could significantly affect the Canadian-dollar cost of maintaining the financial assurance package.
For example, a 10% depreciation of the Canadian dollar (to C$1 = US$0.6655) would increase the C$-equivalent cost to approximately C$368.1 million, an increase of C$36.8 million. Conversely, a 10% appreciation of the Canadian dollar (to C$1 = US$0.8133) would reduce the C$-equivalent cost to approximately C$301.2 million, a decrease of C$30.1 million.
Given the multi-decade duration of the financial assurance obligations, TMC is exposed to substantial long-term currency risk. TMC should consider implementing a hedging strategy for this exposure, as discussed in the Recommendations section below.
VII. Compliance Procedures and Internal Controls
Effective compliance with the consent decree's annual review and adjustment requirements demands disciplined internal procedures, clear allocation of responsibilities, and timely coordination among TMC's internal teams and external advisors. We recommend the following compliance procedures and internal controls.
A. Annual Review Calendar
To ensure that TMC is prepared for each annual review, we recommend the following calendar of preparatory activities, keyed to the anticipated first annual review date of June 14, 2026, and repeating annually thereafter:
If EPA disagrees with TMC's proposed adjustment, the dispute resolution process described in Section IV.A is initiated, with informal negotiation commencing within 30 days of the dispute notice.
TMC should designate a single internal coordinator — we recommend Gareth Linford, as VP of Environmental Health & Safety — to serve as the process owner for the annual review and to ensure that all preparatory activities are completed on schedule. Calderwood & Harkness LLP will continue to serve as outside counsel for the annual review process and will coordinate with all external advisors and counterparties.
B. Documentation and Reporting Requirements
The consent decree imposes specific documentation and reporting requirements in connection with each annual review. TMC must prepare and submit the following documents:
1. Annual Financial Assurance Adequacy Certification. A written certification, signed by the CFO (Carolyn Bracebridge) and the VP EHS (Gareth Linford), confirming that the financial assurance amount is adequate to cover the estimated remaining remediation obligations at all four sites. If an adjustment is required, the certification must specify the new required amount and the proposed allocation between the surety bond and trust fund.
2. Updated Remediation Cost Estimates. Copies of the updated cost estimates prepared by Pinnacle Creek Environmental, with supporting methodological documentation and a narrative explanation of any significant changes from the prior year's estimates.
3. Ironbark Bond Endorsements or Riders. If the surety bond face amount is adjusted, copies of the bond rider or endorsement re

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MATTER NO.: 1039-00003

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