Appellate Briefs

D.C. Cir. No. 25-1264, et al. Order on MISO proposal to establish the Expedited Resource Addition Study (ERAS) process to expedite study of interconnection requests to address urgent resource adequacy and reliability needs in the near term.  Midcontinent Independent System Operator, Inc., 192 FERC ¶ 61,064 (2025), reh’g denied, 194 FERC ¶ 61,050 (2026).

D.C. Cir. No. 24-1361 Order on complaint, alleging that PJM has failed to execute Designated Entity Agreements with each entity designated to construct a transmission project that PJM has selected in its Regional Transmission Expansion Plan.  American Municipal Power, Inc., et al. v. PJM Interconnection, L.L.C., 188 FERC ¶ 61,055 (2024), order on reh’g, 190 FERC ¶ 61,173 (2025).

D.C. Cir. No. 25-1284 Order on remand, reaffirming that the Rio Grande LNG Terminal is not inconsistent with the public interest under section 3 of the Natural Gas Act, and the Rio Bravo Pipeline Project is required by the public convenience and necessity under section 7 of the NGA.  Rio Grande LNG, LLC, et al., 192 FERC ¶ 61,198 (2025), order on reh’g, 194 FERC ¶ 61,218 (2026).

5th Cir. No. 25-60487, et al. Order conditionally accepting statement of operating conditions and granting petition to establish initial system rates for Natural Gas Policy Act section 311 services on the Matterhorn pipeline system, based on comparable intrastate service rates already approved by the Railroad Commission of Texas. Matterhorn Express Pipeline, LLC, 191 FERC ¶ 61,186 (2025), order on reh’g, 193 FERC ¶ 61,213 (2025).

2d Cir. Nos. 26-1387, 26-1422, and 26-1437. Motion to dismiss petitions for review of Const. Pipeline Co., Order on Remand, 194 FERC ¶ 61,064 (2026); and Order Dismissing Requests for Rehearing, 195 FERC ¶ 61,116 (2026).  

D.C. Cir. No. 25-1252 Order issuing certificate, authorizing construction and operation of Northeast Supply Enhancement gas pipeline expansion project in Pennsylvania, New Jersey and New York.  Transcontinental Gas Pipe Line Co., LLC, 192 FERC ¶ 61,184 (2025), order on reh’g, 194 FERC ¶ 61,098 (2026).

D.C. Cir. No. 25-1123. Order on abandoned plant incentive.  Niagara Mohawk Power Corp., 190 FERC ¶ 61,012 (2025), order on reh’g, 192 FERC ¶ 61,237 (2025).

5th Cir. No. 25-60055, et al. Rule prohibiting transmission providers from including in their transmission rates any charges associated with the provision of reactive power within the standard power factor range from generating facilities, and requiring transmission providers to make compliance filings to update their tariffs.  Compensation for Reactive Power Within the Standard Power Factor Range, Order No. 904, 189 FERC ¶ 61,034 (2024), order on reh’g, 191 FERC ¶ 61,188 (2025).

D.C. Cir. No. 26-1086 Response to petition for an extraordinary writ, under the All Writs Act, to stay FERC refund order, on remand from Emera Maine v. FERC, 854 F.3d 9 (D.C. Cir. 2017), and addressing New England Transmission Owners’ base return on equity.  Coakley, et al. v. Bangor Hydro-Electric Co., et al., Opinion No. 594, 194 FERC ¶ 61,208 (Mar. 19, 2026) (rehearing pending).

D.C. Cir. No. 26-1100 - Response to motion for a court stay, of order authorizing construction and operation of the Southeast Supply Enhancement Project in Virginia, North Carolina, Georgia, and Alabama.  Transcontinental Gas Pipe Line Co., LLC, 194 FERC ¶ 61,078 (Jan. 29, 2026) (rehearing pending).      

D.C. Cir. No. 25-1091 - Response to 3/27/26 petition for rehearing en banc, of 2/10/26 court decision affirming FERC order accepting PJM filing to remove Energy Efficiency Resource participation in PJM’s wholesale capacity market.  PJM Interconnection, L.L.C., 189 FERC ¶ 61,095 (2024), order on reh’g, 190 FERC ¶ 61,081 (2025).

D.C. Cir. Nos. 25-1144, et al. Order denying complaint of solar and wind projects in PSCo interconnection queue, that PSCo is improperly conducting interconnection studies by setting aside transmission capacity for PSCo’s own, unqueued generation resources.  Salsa Solar Energy, LLC v. Public Service Co. of Colo., 190 FERC ¶ 61,108 (2025), order on reh’g, 192 FERC ¶ 61,067 (2025).

D.C. Cir. No. 20-1419, et al. Orders, following ALJ hearing and initial decision, on  various rate and refund issues.  Panhandle Eastern Pipe Line Co., LP, 171 FERC ¶ 61,244 (2020); Opinion No. 885, 181 FERC ¶ 61,211 (2022); 183 FERC ¶ 61,148 (2023), 184 FERC ¶ 61,181 (2023); 186 FERC ¶ 61,015 (2024); 187 FERC ¶ 61,112 (2024); 188 FERC ¶  61,162 (2024); 189 FERC ¶ 61,170 (2024); and 191 FERC ¶ 61,013 (2025).

3rd Cir. No. 25-2124 Order accepting PJM-proposed Reliability Resource Initiative, enabling a one-time reliability-based expansion of the eligibility criteria for Transition Cycle #2 of PJM’s existing interconnection queue, to address near-term resource adequacy concerns.  PJM Interconnection, L.L.C., 190 FERC ¶ 61,084 (2025), order on reh’g, 192 FERC ¶ 61,075 (2025).

D.C. Cir. No. 25-1060 Order denying (but not dismissing) complaint, concerning whether Northwest Rural’s withdrawal from Tri-State violates the Basin Eastern Requirements PPA.  Northwest Rural Public Power Dist. v. Basin Elec. Power Coop., et al., 189 FERC ¶ 61,164 (2024), order on reh’g, 191 FERC ¶ 61,087 (2025).

D.C. Cir. No. 25-1064 Order rejecting amendments to Consolidated Transmission Owners Agreement, and denying complaint concerning location of PJM’s Regional Transmission Expansion Planning Protocol in the Operating Agreement.  Duquesne Light Co., et al., 189 FERC ¶ 61,181 (2024), order on reh’g, 192 FERC ¶ 61,051 (2025).

3rd Cir. No. 25-1460, et al. Order issuing preliminary permit, to study the feasibility of the York Energy Storage Waterpower Project, located near Lake Clarke, formed by the Safe Harbor Dam on the Susquehanna River in Pennsylvania; granting priority to file license application.  York Energy Storage, LLC, 189 FERC ¶ 61,123 (2024), order on reh’g, 191 FERC ¶ 61,054 (2025).

D.C. Cir. Nos. 24-1291, et al. Order granting authorizations to construct and operate CP2 LNG terminal in Louisiana and connecting CP Express pipeline from Texas to Louisiana.  Venture Global CP2 LNG, LLC and Venture Global CP Express, LLC, 187 FERC ¶ 61,199 (2024), order on reh’g, 189 FERC ¶ 61,148 (2024), order on reh’g, 191 FERC ¶ 61,153 (2025), orders on reh’g and stay, 192 FERC ¶ 61,155 and ¶ 61,157 (2025).  [motion for court stay of agency authorization, pending judicial review, denied 10/20/25]

D.C. Cir. No. 25-1045, et al. Order on remand, concerning MISO transmission owners’ base return on equity, reversing the portions of Opinion Nos. 569-A and 569-B that include the Risk Premium model in the ROE calculations.  Ass’n of Businesses Advocating Tariff Equity v. Midcontinent Indep. System Operator, Inc., 189 FERC ¶ 61,036 (2024), order on reh’g, 190 FERC ¶ 61,184 (2025).

D.C. Cir. No. 25-1092 Notice denying late intervention, in proceeding to consider Sho-Me Power’s application to surrender the license for the Niangua Hydroelectric Project in Camden County, Missouri.  Sho-Me Power Electric Cooperative, Oct. 15, 2024 Notice, order on reh’g, 190 FERC ¶ 61,028 (2025).