Here is the unpublished opinion.
Brief: appellant brief
Donelson v. United States
Tenth Circuit Materials in Donelson v. U.S.: NEPA Challenge to Interior Drilling Approvals re: Osage Mineral Estate
Briefs in NEPA Challenge to Interior Drilling Approvals re: Osage Mineral Estate
Here are selected materials so far in Donelson v. United States (N.D. Okla.):
162 Donelson Response to B&G Motion to Dismiss
163 Donelson Response to Devon Motion to Dismiss
166 Donelson Response to US Motion to Dismiss
Update (2/28/17):
Turtle Talk 