Dick Dahlgren, joined by California Trout, filed suit against the DWP. Plaintiffs argued that not only did DWP violate the Public Trust Doctrine, it also violated the California Department of Fish and Game Code § 5937. From this case, the court required the DWP to release into lower Rush Creek. In 1986, the Mono Lake Committee brought a similar lawsuit to protect Lee Vining Creek. The court ordered the DWP to maintain a flow of to the creek. In 1989, the court halted the case for four years to allow the State Water Resources Control Board (SWRCB) to produce an Environmental Impact Report in order to recondition DWP's water right licenses, and to prove compliance with the Public Trust Doctrine and the Fish and Game codes During 1993–94, SWRCB Vice-Chairman Marc Del Piero, the attorney on the Board, served as the SWRCB's sole hearing officer and conducted the water rights hearings that lasted for over forty-three days <SWRCB Water Rights Decision 1631>. On September 28, 1994, the SWRCB unanimously adopted Order 1631 and ordered that the lake must be restored to a height of 6392 feet above sea level within the next 20 years. The DWP can continue to divert water during these 20 years, but only an average of per year and the DWP must restore waterfowl and stream damage that resulted from past diversions. Issues In this case, the California courts resolved two issues: The first issue was, whether the Public Trust Doctrine functions independently of the California Water Rights System. The public trust doctrine defines its purpose as maintaining, "All of its navigable, commerce, fishing, swimming, and other recreational purposes as trustee of a public trust for the benefit of the people." Therefore, the waterways cannot belong to just one person as private property; they must be available to all people. The Public Trust Doctrine has also been expanded to protect lands in their natural state to serve as ecological units for scientific study. Mono Lake is a navigable waterway, and it harvests brine shrimp for sale as fish food. Under the traditional public trust cases, the lake is identified as a fishery. Plaintiffs sought to protect the lake's exceptional recreational and ecological value of the lake and its shore, the purity of the air, and the use of the lake for nesting and feeding by birds. Quoting Marks v. Whitney, the court said, "There is a