The Nevada Supreme Court held that the public trust doctrine did not permit reallocation of water rights already adjudicated and settled under the doctrine of prior appropriation in a lawsuit concerning established water rights for a deteriorating lake in western Nevada.

The Ninth Circuit affirmed summary judgment for the U.S. Navy in a challenge to its decisions to relocate troops from Okinawa, Japan, to Guam and construct training facilities on the Commonwealth of the Northern Mariana Islands (CNMI).

In an unpublished opinion, the Ninth Circuit granted in part and denied in part an environmental group's petition to review EPA's approval of the Idaho Pollution Discharge Elimination System (IPDES).

The Tenth Circuit upheld a lower court ruling ordering mining and finance companies to comply with EPA's requests for information related to cleanup of a contaminated site in Utah.