(a) Once TVA has made a determination of the level of NEPA review, TVA, and if applicable, project sponsors or other participating agencies, will establish a schedule for the completion of the environmental document, consistent with deadlines identified in NEPA sec. 107(g), 42 U.S.C. 4336a(g). Prior to establishing the schedule, TVA will review for completeness any information, data, materials, and/or any applications or agreements that are necessary to determine the level of NEPA review.

(b) TVA will address in the schedule, as appropriate, any concurrent and integrated surveys and studies required by other applicable environmental review laws and Executive Orders, including but not limited to the National Historic Preservation Act of 1966 (54 U.S.C. 300101 et seq.) and the Endangered Species Act of 1973 (16 U.S.C. 1531 et seq.).

(c) As the Supreme Court has repeatedly held, NEPA is governed by a “rule of reason.” Congress supplied the measure of that reason in the 2023 revision of NEPA by setting the deadlines in NEPA sec. 107(g), 42 U.S.C. 4336a(g). These deadlines indicate Congress's determination that an agency has presumptively spent a reasonable amount of time on analysis and the document should issue, absent very unusual circumstances. In such circumstances, an extension will be given only for such time as is necessary to complete the analysis.

(1) TVA will complete an EIS not later than the date that is 2 years after the sooner of the date on which TVA determines that NEPA requires the preparation of an EIS with response to the proposal; the date on which TVA notifies the applicant that the application to establish a right-of-way for the proposal is complete; and the date on which TVA issues a notice of intent to prepare the EIS. (42 U.S.C. 4336a(g)(1)(A))

(2) TVA will complete an EA not later than the date that is 1 year after the sooner of the date on which TVA determines that NEPA requires the preparation of an EA with response to the proposal; the date on which TVA notifies the applicant that the application to establish a right-of-way for such action is complete; and the date on which TVA issues a notice of intent to prepare the EA for the proposal. (42 U.S.C. 4336a(g)(1)(B))

(3) TVA will calculate EIS or EA schedules from the applicable start date to the date TVA publishes the EIS or a finding of no significant impact as the end date. Where TVA has prepared an EA that results in a decision to prepare an EIS, TVA will use the start date for the EA as the start date for the EIS unless it exercises its discretion to determine otherwise by direction of the TVA official responsible for NEPA.

(4) The EIS or EA will publish (unless the deadline is extended pursuant to the provision below) on the day the deadline elapses, in as substantially complete form as is possible.

(5) TVA will document the start and completion dates of each EIS or EA to assist TVA in tracking the schedule and preparing a report to congressional committees required by NEPA § 107(h), 42 U.S.C. 4336a(h).

(d) If TVA determines it is not able to meet the deadline prescribed by NEPA sec. 107(g)(1), 42 U.S.C. 4336a(g)(1), TVA will consult with the applicant, if any, pursuant to NEPA sec. 107(g)(2), 42 U.S.C. 4336a(g)(2). After such consultation, if needed, and for cause stated, TVA may establish a new deadline and appropriately document the cause. Cause for establishing a new deadline is only established if the EIS or EA is so incomplete, at the time at which TVA determines it is not able to meet the statutory deadline, that issuance would, in TVA's view, result in an inadequate analysis. Such new deadline must provide only so much additional time as is necessary to complete such EIS or EA. The announcement of the new deadline will specify the reason why the EIS or EA was not able to be completed under the statutory deadline and whether the applicant consented to the new deadline.

(e) When the EIS or EA is published, a responsible official will certify (and the certification will be incorporated into the EIS or EA) that the resulting EIS or EA represents TVA's good-faith effort to fulfill NEPA's requirements within the Congressional timeline; that such effort is substantially complete; and that, in the TVA's expert opinion, it has thoroughly considered the factors mandated by NEPA; and that, in TVA's judgment, the analysis contained therein is adequate to inform and reasonably explain TVA's final decision regarding the proposed federal action.