Here is the opinion in State v. Steven B.:
New Mexico Supreme Court Determines that Parcel Three of Fort Wingate on the Navajo Nation Reservation is Not Indian Country
Here is the opinion in State v. Steven B.:
Dependent Indian Community
Tenth Circuit to Hear HRI v. EPA En Banc
Here is the order (CA10 Order Granting En Banc Review), the earlier materials (here), the news report from Indianz, and here are the en banc petition stage materials:
EPA Opposition to En Banc Petition
HRI, Inc. v. EPA — Dependent Indian Community Determination
A split panel of the Tenth Circuit concluded that the EPA was within its authority to find that a checkerboarded area of northwestern New Mexico was Indian Country for Safe Drinking Water Act purposes. Here is the opinion.
Here are just some of the many briefs filed in this case (I think I got all the important ones):
national-mining-assoc-amicus-brief
Turtle Talk 