|
The Western Electricity Coordinating Council's May 24, 2024 report warns that utility resource plans in the western interconnect will not meet future demand, particularly if Colstrip Units 3 and 4 retire prematurely.
|
2026 |
2025-EPA-04883 |
0006225
|
1 |
|
A January 15, 2025 letter from multiple energy companies, including Duke Energy and Basin Electric Power Cooperative, to Lee Zeldin, nominee for EPA Administrator, requests immediate action to rescind recent EPA regulations on greenhouse gas emissions and coal combustion residuals, citing negative impacts on electricity reliability and economic growth.
|
2025 |
2025-EPA-04193 |
0007036–0007040
|
5 |
|
On April 16, 2025, City Water, Light and Power of Springfield, Illinois, submitted a request to EPA Administrator Lee Zeldin for a two-year exemption from compliance with the revised MATS rule for Dallman Unit 4, citing technological unavailability and the unit's critical role in regional grid reliability.
|
2025 |
2025-EPA-04883 |
0020495–0020497
|
3 |
|
On March 31, 2025, a Presidential Exemption Request details the critical role of the GVEA Healy Power Plant in supplying electricity to military installations in Interior Alaska and supporting the Trans Alaska Pipeline System amid a natural gas shortage.
|
2025 |
2025-EPA-04883 |
0005603
|
1 |
|
On March 31, 2025, GVEA submitted a Presidential Exemption Request to the EPA for the Healy Power Plant, seeking a two-year exemption from MATS compliance due to technical infeasibility and the critical nature of its electrical service in Interior Alaska.
|
2025 |
2025-EPA-04883 |
0005604
|
1 |
|
The EPA's interim release for FOIA request 2025-EPA-04883 discusses national security concerns related to the MATS RTR, citing President Trump's Executive Orders and the impact on North Dakota's energy grid reliability.
|
2025 |
2025-EPA-04883 |
0005971
|
1 |
|
A request for a two-year exemption from the revised MATS rule emissions standard for Northampton Generating Unit 1 was submitted by Vincent J. Brisini of Olympus Power, citing concerns over economic viability and grid reliability in Pennsylvania.
|
2025 |
2025-EPA-04883 |
0006015
|
1 |
|
A request for a two-year exemption from the revised MATS rule emissions standard for Bay Shore Unit 1 was submitted by Vincent J. Brisini, Director of Environmental Affairs at Olympus Power, citing concerns over electric grid reliability and economic viability.
|
2025 |
2025-EPA-04883 |
0006046
|
1 |
|
A letter from Alexander Brush, General Manager of SER, dated September 10, 2025, requests a Presidential Exemption from the MATS Rule, citing national security interests and the need for reliable power generation.
|
2025 |
2025-EPA-04883 |
0006079
|
1 |
|
A March 28, 2025, request from Talen Energy for exemption from CAA Section 112 regulations for the Colstrip facility cites technological, economic, and timing unavailability of required control technology, emphasizing its importance for national security and regional electricity reliability.
|
2025 |
2025-EPA-04883 |
0006088
|
1 |
|
A March 28, 2025, document discusses the national security implications of exempting the Colstrip power plant from the 2024 MATS Rule, citing comments from Talon Montana and NorthWestern regarding its critical role in providing reliable electricity in Montana.
|
2025 |
2025-EPA-04883 |
0006094
|
1 |
|
The March 28, 2025, Hines Declaration discusses Colstrip's critical role in grid reliability, its economic impact on Montana, and potential national security risks if operations are curtailed due to the 2024 MATS Rule.
|
2025 |
2025-EPA-04883 |
0006095
|
1 |
|
Technical Memo critiques EPA's exclusion of certain coal/oil burning units from emissions evaluations, arguing that this omission could lead to unreliable grid operations and questioning the data selection methodology used for baseline emissions rates.
|
2025 |
2025-EPA-04883 |
0006107
|
1 |
|
NorthWestern Energy's May 2023 Integrated Resource Plan outlines risks associated with potential closure scenarios for the Colstrip power plant by 2025, 2030, and beyond, emphasizing market instability and environmental concerns.
|
2025 |
2025-EPA-04883 |
0006141
|
1 |
|
NorthWestern Energy outlines its legal obligations under Montana law to provide reliable and cost-effective electricity, detailing the requirements for its triennial planning process to meet customer demands and environmental standards.
|
2025 |
2025-EPA-04883 |
0006144
|
1 |
|
NorthWestern Energy's report outlines the limitations of its transmission system for importing electricity, emphasizing reliance on non-firm transmission during peak demand and the risks associated with outages, dated September 10, 2025, under FOIA ID 2025-EPA-04883.
|
2025 |
2025-EPA-04883 |
0006152
|
1 |
|
A 2025 EPA FOIA document discusses the potential irreversible economic impacts on the Colstrip community and surrounding areas due to the premature retirement of the Colstrip power plant, emphasizing increased remediation costs and risks to electricity reliability.
|
2025 |
2025-EPA-04883 |
0006224
|
1 |
|
A March 2025 document discusses the need for Presidential Exemptions for Basin Electric's affected EGUs to avoid exacerbating a National Energy Emergency, citing potential risks to national security and electricity grid reliability.
|
2025 |
2025-EPA-04883 |
0006288
|
1 |
|
Minnkota operates the Milton R. Young Station, a coal-fired power plant in North Dakota, contributing to MISO's dispatchable power capabilities essential for grid reliability across fifteen states.
|
2025 |
2025-EPA-04883 |
0006312
|
1 |
|
Minnkota Power Cooperative submitted a request for a Section 112(i)(4) exemption from compliance with the MATS RTR for the Young Station, citing concerns over technological feasibility and grid reliability.
|
2025 |
2025-EPA-04883 |
0006311
|
1 |
|
The EPA's interim release for FOIA request 2025-EPA-04883 discusses Minnkota's electricity generation capabilities, emphasizing its role in providing dispatchable power and its membership in the Lignite Energy Council.
|
2025 |
2025-EPA-04883 |
0006364
|
1 |
|
The EPA FOIA release 2025-EPA-04883 discusses the impact of the MATS RTR on North Dakota's lignite-powered plants, particularly the Milton R. Young Station's emissions reductions and reliability concerns for the regional electric grid.
|
2025 |
2025-EPA-04883 |
0006366
|
1 |
|
The interim release from EPA FOIA ID 2025-EPA-04883 discusses concerns regarding grid reliability in North Dakota due to the early retirement of coal-fired units resulting from new Mercury and PM limitations.
|
2025 |
2025-EPA-04883 |
0006389
|
1 |
|
EPA's interim release for FOIA request 2025-EPA-04883 discusses the economic damages to Minnkota from grid failures and the inability of MRY to meet the New Mercury Limitation with existing technology.
|
2025 |
2025-EPA-04883 |
0006393
|
1 |
|
Minnkota's analysis indicates that premature retirement of the MRY units could lead to a $236 million exposure to the MISO market, jeopardizing its financial stability and operational revenues.
|
2025 |
2025-EPA-04883 |
0006395
|
1 |
|
On March 28, 2025, Minnkota Power Cooperative submitted a request to EPA Administrator Lee Zeldin for a two-year Presidential Exemption from compliance with the MATS RTR emissions standards for the Milton R. Young Station, citing technological unavailability and grid reliability concerns.
|
2025 |
2025-EPA-04883 |
0012782–0012793
|
12 |
|
On April 16, 2025, City Water, Light and Power of Springfield, Illinois, submitted a request to EPA Administrator Lee Zeldin for a two-year exemption from the 2024 MATS rule for Dallman Unit 4, citing technological unavailability and the unit's critical role in regional grid reliability.
|
2025 |
2025-EPA-04883 |
0014840–0014842
|
3 |
|
Email from Thomas Catenacci to Ben Dietderich on May 23, 2025, inquiring about the embargo on an emergency order issued by Energy Secretary Chris Wright to secure grid reliability in the Midwest ahead of summer electricity demand.
|
2025 |
DOE-HQ-2025-02714-F |
0021221–0021222
|
2 |
|
Email correspondence between Ben Dietderich and Thomas Catenacci on May 23, 2025, discusses the lifting of an embargo on an emergency order issued by Energy Secretary Chris Wright to secure grid reliability in the Midwest.
|
2025 |
DOE-HQ-2025-02714-F |
0021226–0021227
|
2 |
|
On May 16, 2025, Ben Dietderich of the Department of Energy emailed Thomas Catenacci to announce emergency actions aimed at providing immediate relief to Puerto Rico's power grid, including two emergency orders authorized under the Federal Power Act.
|
2025 |
DOE-HQ-2025-02714-F |
0021228–0021234
|
7 |
|
Email from Ben Dietderich to Matthew Boyle on June 23, 2025, provides background on the Loan Programs office, emergency orders for coal/oil plants, and energy reliability challenges in the MISO region.
|
2025 |
DOE-HQ-2025-02714-F |
0021244–0021245
|
2 |
|
Attachment 1 from the Edison Electric Institute outlines strategies to meet growing electricity demand while ensuring economic growth and national security, emphasizing the need for streamlined permitting and regulatory frameworks as of February 2025.
|
2025 |
DOE-HQ-2025-02714-F |
0021452–0021454
|
3 |
|
Attachment 2 from the Edison Electric Institute discusses the impact of energy tax credits on electricity prices, emphasizing their role in supporting energy dominance goals and the need for continued investment in generation capacity amid rising demand, dated February 2025.
|
2025 |
DOE-HQ-2025-02714-F |
0021455–0021457
|
3 |
|
On July 7, 2025, the Department of Energy released its Resource Adequacy Report, detailing the risks to U.S. power grid reliability due to plant closures and increased energy demands from data centers, as mandated by President Trump's Executive Order 14262.
|
2025 |
DOE-HQ-2025-02714-F |
0027499–0027502
|
4 |
|
On July 7, 2025, the Department of Energy released its Resource Adequacy Report, detailing the U.S. power grid's inability to meet rising energy demands due to plant closures and reliance on intermittent energy sources.
|
2025 |
DOE-HQ-2025-02714-F |
0027506–0027509
|
4 |
|
On July 7, 2025, the Department of Energy released its Resource Adequacy Report, detailing the risks to U.S. power grid reliability due to plant closures and increased energy demands from data centers, as mandated by President Trump's Executive Order 14262.
|
2025 |
DOE-HQ-2025-02714-F |
0027547–0027550
|
4 |
|
Duke Energy's April 1, 2024, Fast Facts report outlines the company's operations, including serving 8.4 million electric customers across six states and its commitment to achieving net-zero carbon emissions by 2050.
|
2024 |
2025-EPA-04193 |
0000362–0000363
|
2 |
|
Email from Ccorgianna R. Stenger, Assistant Manager at Keystone-Conemaugh Projects, dated September 10, 2025, discusses the evaluation of new PM monitor technologies and the potential impact of the 2024 MATS rule on electric grid reliability.
|
2024 |
2025-EPA-04883 |
0005631
|
1 |
|
A letter from Gcor2ianna R. Stenger, Assistant Manager at Keystone-Conemaugh Projects, submitted to the EPA on September 10, 2025, requests an extension of compliance deadlines for nonmercury metal emissions technologies, citing national security concerns regarding electric grid reliability.
|
2024 |
2025-EPA-04883 |
0005634
|
1 |
|
NERC's 2024 report highlights risks in the MISO region's power grid, noting that coal and gas generator retirements could impact energy reliability for military installations in South Dakota, including Ellsworth Air Force Base.
|
2024 |
2025-EPA-04883 |
0005962
|
1 |
|
Hugo Generating Station's MATS Presidential Exemption Request discusses the implications of regulatory changes on coal-based electric generation units and the potential for capacity shortfalls, citing concerns from the North American Electric Reliability Corporation and referencing President Trump's National Energy Emergency declaration.
|
2024 |
2025-EPA-04883 |
0006061
|
1 |
|
NorthWestern Energy's report outlines concerns regarding its capacity to meet customer demands due to expiring market contracts and reliance on market purchases, emphasizing the need for additional peaking and flexible capacity resources.
|
2024 |
2025-EPA-04883 |
0006150
|
1 |
|
Talen Montana operates Units 3 and 4 at the Colstrip Power Plant in Montana, which has a combined capacity of 1,480 MW and plays a key role in regional electricity supply.
|
2024 |
2025-EPA-04883 |
0006167
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the operational differences between Talen Montana as a merchant power producer and traditional regulated utilities regarding cost recovery and market exposure.
|
2024 |
2025-EPA-04883 |
0006171
|
1 |
|
Market price volatility for electricity affects Talen Montana's ability to recover costs for pollution control investments, complicating long-term planning and decision-making among Colstrip's six owners due to differing financial motivations and regulatory considerations.
|
2024 |
2025-EPA-04883 |
0006172
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the potential closure of Colstrip Units 3 & 4 and its impact on Montana's electrical grid reliability, along with EPA's interpretation of regulatory authorities regarding the MATS and GHG Rules.
|
2024 |
2025-EPA-04883 |
0006261
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses NorthWestern's regulatory processes for electricity rate increases, detailing the requirements for cost recovery and the impact of regulatory lag on the company's creditworthiness.
|
2024 |
2025-EPA-04883 |
0006264
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the Michigan Public Service Commission's approval of a 28% increase in residential electricity rates and the financial implications for NorthWestern due to compliance costs associated with the MAIS2 and MATS2 Rules.
|
2024 |
2025-EPA-04883 |
0006265
|
1 |
|
NorthWestern's filing in USCA Case #24-1190 on June 27, 2024, discusses the implications of the MATS2 Rule on its upcoming rate case and the potential financial impacts on ratepayers and electric grid reliability related to the closure of the Colstrip facility.
|
2024 |
2025-EPA-04883 |
0006266
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses NorthWestern's electricity supply and balancing authority responsibilities in Montana, including its inability to replace Colstrip's capacity and compliance with Montana Public Service Commission objectives.
|
2024 |
2025-EPA-04883 |
0006267
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses NorthWestern's legal obligations as a regulated public utility in Montana to provide reliable and cost-effective electricity while minimizing environmental impacts.
|
2024 |
2025-EPA-04883 |
0006268
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses NorthWestern's electricity supply resources, including its diverse generation portfolio with significant renewable capacity and market exposure risks.
|
2024 |
2025-EPA-04883 |
0006270
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses NorthWestern's Integrated Resource Plan, outlining its competitive solicitation process for energy resources and the necessity of balancing electricity generation and consumption.
|
2024 |
2025-EPA-04883 |
0006269
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the challenges of electricity generation in Montana due to extreme weather, high demand, and reliance on volatile market purchases.
|
2024 |
2025-EPA-04883 |
0006274
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the limitations of Montana's transmission system and the impact of power plant closures on electricity availability for NorthWestern's customers.
|
2024 |
2025-EPA-04883 |
0006275
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses anticipated retirements of significant power generation units in the Pacific Northwest, including Centralia Unit 2 and North Valmy Unit 2, leading to concerns over electrical reliability.
|
2024 |
2025-EPA-04883 |
0006276
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses NorthWestern's electricity supply planning challenges, including reliance on market purchases and the selection of the Yellowstone County Generating Station through a 2020 RFP.
|
2024 |
2025-EPA-04883 |
0006277
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the limitations of battery storage for addressing peak demand in Montana's energy system, comparing it to California's requirements.
|
2024 |
2025-EPA-04883 |
0006278
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the implications of plant closures on electricity capacity and the risk of rolling blackouts in Montana, referencing the critical role of Colstrip in voltage maintenance.
|
2024 |
2025-EPA-04883 |
0006281
|
1 |
|
EPA's response to NorthWestern's comments on the MATS2 Proposed Rule discusses the challenges of replacing Colstrip's capacity before the mid-2030s and mentions NorthWestern's participation in the Western Resource Adequacy Program for grid reliability.
|
2024 |
2025-EPA-04883 |
0006283
|
1 |
|
The North Dakota Transmission Authority's April 3, 2024 analysis warns that the EPA's MATS RTR could lead to significant economic losses and public health risks due to potential power grid failures.
|
2024 |
2025-EPA-04883 |
0006391
|
1 |
|
EPA's interim release dated September 10, 2025, discusses the challenges and costs associated with compliance for the revised mercury and particulate matter standards at the Oak Grove Power Plant, citing technological limitations and potential impacts on grid reliability.
|
2023 |
2025-EPA-04883 |
0005927
|
1 |
|
Bradley E. Tollerson, Vice President of Energy Supply at Otter Tail Power Company, submitted a request for exemption from MAI SKIR compliance for the Coyote Station, citing national security concerns related to power reliability for critical military installations in North Dakota.
|
2023 |
2025-EPA-04883 |
0005972
|
1 |
|
NorthWestern Energy submitted comments on the Proposed Rule regarding Colstrip's compliance with pollution standards, detailing significant costs and implications for electrical service in Montana, dated September 10, 2025.
|
2023 |
2025-EPA-04883 |
0006140
|
1 |
|
NorthWestern's transmission system, regulated by FERC, faces competition for available transfer capability among various customers, with no preference given to its own native load, as detailed in the interim release dated February 23, 2023.
|
2023 |
2025-EPA-04883 |
0006155
|
1 |
|
NorthWestern's report outlines challenges in increasing transmission capacity due to regulatory hurdles, environmental approvals, and the complexities of coordinating with multiple utilities and jurisdictions, as of January 27, 2023.
|
2023 |
2025-EPA-04883 |
0006156
|
1 |
|
NorthWestern's report details that in 2022, 59% of its electric generation came from carbon-free resources, significantly higher than the national average of 40% for the U.S. electric power industry.
|
2022 |
2025-EPA-04883 |
0006147
|
1 |
|
The report discusses the transmission paths in Montana, particularly Path 8 and Path 80, detailing their total transfer capability and issues with available transmission capacity and congestion.
|
2021 |
2025-EPA-04883 |
0006153
|
1 |
|
The North Dakota Transmission Authority's report discusses the economic impacts and public health risks associated with generator retirements and demand growth, emphasizing the importance of reliable energy for military and emergency services.
|
2021 |
2025-EPA-04883 |
0006320
|
1 |
|
Talen Montana submitted comments to the EPA regarding proposed amendments to the MATS rule, emphasizing the economic importance of Colstrip for reliable electricity in Montana and requesting reconsideration of stricter fPM limits.
|
2020 |
2025-EPA-04883 |
0006104
|
1 |
|
NorthWestern Energy submitted its 2019 Electricity Resource Procurement Plan to the Montana Public Service Commission, detailing its diverse generation portfolio and future resource plans, including a 2023 Integrated Resource Plan.
|
2019 |
2025-EPA-04883 |
0006145
|
1 |
|
The 2019 Electricity Supply Resource Procurement Plan from NorthWestern indicates that despite improvements in generation capacity, the company often lacks sufficient reliable capacity during peak load periods, necessitating market purchases to meet customer demand.
|
2019 |
2025-EPA-04883 |
0006148
|
1 |
|
The August 18, 2016 article discusses the Massachusetts Supreme Judicial Court's ruling against the Access Northeast pipeline project, overturning a gas-electric harmonization plan approved by the Department of Public Utilities, impacting long-term capacity contracts for electric distribution companies.
|
2016 |
DOE-HQ-2025-02714-F |
0027168–0027170
|
3 |
|
NorthWestern Energy's report outlines its dependence on market purchases for electricity during peak demand, noting rising prices and reduced availability due to recent closures of several power plants in Montana and the Pacific Northwest.
|
2015 |
2025-EPA-04883 |
0006149
|
1 |
|
NorthWestern Energy's report details its independent evaluation process for selecting proposals to meet short-duration power needs, including a 50 MW battery facility near Billings, while noting transmission limitations and the transition from being a net energy exporter following plant closures.
|
2015 |
2025-EPA-04883 |
0006151
|
1 |
|
A 2012 communication from Luminant argues for exemptions from the MATS rule's revised PM standard and CEMS requirements, citing national security concerns related to energy generation capacity and grid reliability, referencing President Trump's Executive Orders 14154 and 14156.
|
2012 |
2025-EPA-04883 |
0005923
|
1 |
|
Comments submitted by Luminant regarding the MATS rule highlight significant costs and market limitations associated with compliance, emphasizing the national security implications of energy generation capacity and grid reliability as outlined in President Trump's Executive Orders.
|
2012 |
2025-EPA-04883 |
0005933
|
1 |
|
Comments submitted to the EPA regarding the MATS RTR highlight concerns over the reliability and cost of PM Continuous Emissions Monitoring Systems (CEMS) and argue for national security exemptions from compliance due to potential impacts on energy generation and grid stability.
|
2012 |
2025-EPA-04883 |
0005938
|
1 |
|
Comments submitted by Luminant regarding the MATS RTR emphasize the national security implications of compliance costs and the potential impact on energy generation capacity and grid reliability, referencing Executive Orders from January 2025.
|
2012 |
2025-EPA-04883 |
0005950
|
1 |
|
Cynthia Vodopivec, Senior Vice President of Environmental Health and Safety at Sierra Club, submitted a request for exemptions from the MATS RTR on September 10, 2025, citing national security concerns regarding energy generation and grid reliability.
|
2012 |
2025-EPA-04883 |
0005955
|
1 |
|
Hugo Generating Station submitted a 2012 Presidential Exemption Request to the EPA, arguing that compliance with the Final Rule's continuous monitoring requirements for fPM emissions is infeasible due to technology limitations and emphasizing the importance of energy grid reliability.
|
2012 |
2025-EPA-04883 |
0006060
|
1 |
|
NorthWestern Energy reported limited available transmission capacity for imports on Path 80 and Path 18, with ongoing challenges in managing generation and loads as of February 23, 2023.
|
2012 |
2025-EPA-04883 |
0006154
|
1 |
|
NorthWestern Energy's 2012 report details the indefinite postponement of the Mountain States Transmission Intertie project due to permitting challenges, alongside anticipated costs for compliance with proposed regulations affecting the Colstrip facility.
|
2012 |
2025-EPA-04883 |
0006157
|
1 |
|
FOIA request 2025-EPA-04883 submitted by Michelle R. Freeark on September 10, 2025, seeks a two-year variance from emissions standards for Apache Steam Unit #3, citing technological limitations and national security concerns related to electric grid stability in Southeastern Arizona.
|
1979 |
2025-EPA-04883 |
0006423
|
1 |
|
Edison Electric Institute's April 2025 report discusses how transferability of tax credits reduces electricity costs and promotes efficient use of tax credits, emphasizing its benefits for electric companies and customers.
|
1970 |
DOE-HQ-2025-02714-F |
0021458–0021459
|
2 |