ORDER AND JUDGMENT
This case arises from a dispute over whether the federal government violated the National Environmental Policy Act (“NEPA”) when it approved leases and drilling permits for the mineral estate underlying the property of the trustee for the Paul B. Hayes Family Trust. The district court concluded that the Bureau of Indian Affairs (“BIA”) had failed to comply with NEPA. It also denied a motion by the Osage Minerals Council (“OMC”), an independent agency of the Osage Nation, to dismiss for failure to join a necessary and indispensable party. While OMC’s appeal was pending, the BIA retroactively approved the leases based on new NEPA analysis. Because this later approval superseded the agency action challenged below, we dismiss this appeal as moot and vacate the stated orders of the district court.
I
The Osage Reservation was established in 1872 and originally comprised all of the land now in Osage County, Oklahoma. See Act of June 5, 1872, ch. 310, 17 Stat. 228. In 1906, Congress allotted the Reservation to individual tribal members. Act of June 28,1906, ch. 3572, § 2, 34 Stat. 539, 540-43. The mineral estate underlying those tracts, however, was not transferred to individual ownership. Id. § 3,
OMC entered into two leases with Chaparral Energy in 2012 and 2013 for portions of the Osage Mineral Estate underlying plaintiffs property.
In July 2014, the BIA sent a letter to all lessees of the Osage Mineral Estate announcing that it would no longer rely on the 1979 EA. It instructed anyone seeking the BIA’s approval of leases and drilling permits after August 12, 2014, to submit a draft EA of the proposed actions for agency review.
One month later, the trustee filed suit against Chaparral, the United States, the Department of the Interior, and the BIA. He sought a declaration that the leases and permits described above were void because the BIA failed to comply with NEPA. Plaintiff also brought a trespass claim against Chaparral, alleging that the company had no right to use his surface property because the leases and permits were invalid. OMC moved to intervene for the limited purpose of seeking dismissal for failure to join a necessary and indispensable party. Granting OMC’s motion to intervene, the district court denied its motion to dismiss and declared that the BIA’s approval of the leases and permits violated NEPA. It certified its order as final and appealable.
OMC timely appealed. While this appeal was pending, the BIA retroactively approved the leases between OMC and Chaparral and their subsequent assignment to a different company that is not a party to this litigation. In reapproving the leases, the BIA relied on new NEPA analysis. Consistent with the July 2014 letter announcing that the agency would no longer rely on the 1979 EA, in November 2014 the BIA published a new Programmatic Environmental Assessment for Leasing Activities in Osage County, Oklahoma, in which it found that such leasing would have no significant impact on the environment. In April 2015, the BIA issued another Programmatic Environmental Assessment analyzing operations to maintain or modify existing wells. Plaintiff has challenged the BIA’s decision to retroactively approve the leases in a separate action, which is currently pending before the U.S. District Court for the Northern District of Oklahoma. See Compl., Hayes v. Jewell, No. 16-cv-615-JED-FHM (N.D. Okla. Sept. 30, 2016). Both OMC and the government argue that this appeal is now moot.
II
“[T]he existence of a live case or controversy is a constitutional prerequisite to federal court jurisdiction.” Rio Grande Silvery Minnow v. Bureau of Reclamation,
We conclude that the BIA’s new NEPA analysis mooted this appeal “[b]y eliminating the issues upon which this case is based.” Wyoming v. U.S. Dep’t of Agric.,
To the contrary, plaintiff argues that this appeal is live because it specifically concerns the non-joinder of an indispensable party rather than the merits of the district court’s NEPA ruling. This is a distinction without a difference. The leases and drilling permit approvals adjudicated below are no longer operative. Therefore, any decision we make regarding the district court’s refusal to dismiss would not have a tangible effect on plaintiffs claims. Plaintiff also argues that the BIA has not taken any remedial action regarding the drilling permits invalidated by the district court. Those permits have expired regardless of the result of this appeal.
This appeal does not fall into either of the two exceptions to our general mootness rule. An exception for issues “capable of repetition, yet evading review” applies if “(1) the duration of the challenged action is
We thus ask whether the voluntary cessation exception is applicable. Voluntary termination of illegal conduct moots a case only if “there is no reasonable expectation that the alleged violation will recur, and ... interim relief or events have completely and irrevocably eradicated the effects of the alleged violation.” Cty. of Los Angeles v. Davis,
“When a case becomes moot pending appeal, the general practice is to vacate the judgment below and remand with directions to dismiss.” U.S. Dep’t of Agric.,
III
For the foregoing reasons, we GRANT OMC’s motion to dismiss and REMAND to the district court with instructions to VACATE its orders of March 23, 2016, and March 29, 2016.
Notes
This order and judgment is not binding precedent, except under the doctrines of law of the case, res judicata, and collateral estoppel. It may be cited, however, for its persuasive value consistent with Fed. R. App. P. 32.1 and 10th Cir, R. 32.1.
. The district court referenced only the 2013 lease in its order. However, the record suggests that two leases were at issue. This factual ambiguity is immaterial to our disposition.
. At oral argument, plaintiff appeared to argue for the first time that this case is live due to the operation of a well on his property after the permit had expired. But plaintiff did not raise this argument in his brief, and thus the issue is waived. See United States v. Rivera-Nevarez,
. We note in his second lawsuit, which remains pending, plaintiff has asserted a trespass claim based on the alleged invalidity of the leases under the new NEPA analysis.
