Mineral County v. Lyon County
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The Supreme Court answered in the negative a question certified to it by the Ninth Circuit Court of Appeals, holding that the public trust doctrine does not permit the reallocation of rights already adjudicated and settled under the doctrine of prior appropriation.
This litigation stemmed from Mineral County's intervention in longstanding litigation over water rights in the Walker River Basin to protect and restore Walker Lake. Here, the Supreme Court was asked for the first time to consider whether the public trust doctrine permits reallocating water rights previously settled under Nevada's prior appropriation doctrine. The Supreme Court held that the doctrine, as implemented through the state's water statutes, does not permit reallocating water rights already adjudicated and settled under the doctrine of prior appropriation.
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