I was checking the US Supreme Court’s website for recent opinions and came across one for State of Montana v. State of Wyoming and State of North Dakota. This opinion looks very different than the others I’ve read in the past. Specifically:
The case was based on a “Bill of Complaint,” not a writ of certiorari, which is what I’m more used to seeing.
The case references a “Special Master,” a term I’ve never seen before.
The opinion is not signed, not even “Per Curiam.”
The opinion states a “Decree,” which is quite different than the structure I’m used to seeing.
The case number is “137, Orig.,” which seems to be a different numbering system than what’s typically used.
I’ve been trying to Google these terms to see what they mean, but I’m having trouble finding anything on them.
I know that the US Supreme Court has original jurisdiction in cases between states. Is this an exercise of that jurisdiction? If not, what exactly is this type of opinion?