use of appropriated water or by bringing an independent public trust claim. Therefore, the plaintiffs could claim that DWP's use of the water was unreasonable. Plaintiffs also could bring the public trust claim pursuant to section 2501 of the Water Code, which said, "The board may determine, in the proceedings provided for in this chapter, all rights to water of a stream system whether based upon appropriation, riparian right, or other basis of right." Section 2501 refers to water rights as bringing the proceedings before the Water Board. Decision The California Supreme Court entered its decision in 1983 with the majority opinion written by Justice Broussard with Justices Bird, Mosk, Kaus and Reynoso, concurring. A separate concurring opinion was entered by Kaus. Justice Richardson issued an opinion concurring in part and dissenting in part. While the public trust doctrine protects navigable waterways like Mono Lake, the question remained whether diversions of non-navigable waters like the Mono Lake tributaries might also fall under the doctrine's scope. The majority concluded that when diversions of non-navigable tributaries impair the public interest in navigable waterways, the scope of the public trust doctrine is sufficiently broad to proscribe such actions. The applicability of the public trust doctrine to the case was described by the court as follows: "The principal values plaintiffs seek to protect . . . are recreational and ecological . . . the scenic views of the lake and its shore, the purity of the air and the use of the lake for nesting and feeding by birds. Under Marks v. Whitney, supra, 6 Cal.3d 251, 98 Cal. Rptr. 790, 491 P.2d 374, it is clear that protection of these values is among the purposes of the public trust." In examining the relationship between the public trust doctrine and appropriative water rights in California, the court determined that, in some cases, the public interest served by water diversions may outweigh considerations of harm to public trust sources. The population and economy of California depend on the appropriation of vast quantities of water for uses unrelated to trust values. However, the court held that harm to public trust resources should be avoided or minimized if feasible. The court stated that, under Article X, section 2 of the California Constitution "all uses of water, including public trust uses, must conform to the standard of reasonable use." In concluding, the court stated that the water rights