National Audubon Society v. Superior Court
AI Case Brief
Generate an AI-powered case brief with:
Estimated cost: $0.001 - $0.003 per brief
Full Opinion
NATIONAL AUDUBON SOCIETY et al., Petitioners,
v.
THE SUPERIOR COURT OF ALPINE COUNTY, Respondent; DEPARTMENT OF WATER AND POWER OF THE CITY OF LOS ANGELES et al., Real Parties in Interest.
Supreme Court of California.
*423 COUNSEL
F. Bruce Dodge, Morrison & Foerster, Sanford M. Skaggs, Palmer Brown Madden, Marie P. Rivera and Van Voorhis & Skaggs for Petitioners.
Antonio Rossmann, Muenzberg & Thomson, James S. Thomson, Robin G. Pulich, Greene, Kelley & Tobriner, Frank A. Lowe, E. Clement Shute, Jr., and Shute, Mihaly & Weinberger as Amici Curiae on behalf of Petitioners.
No appearance for Respondent.
Adolph Moskovitz, Kronick, Moskovitz, Tiedemann & Girard, Ira Reiner, City Attorney, Edward C. Farrell, Chief Assistant City Attorney, Kenneth W. Downey, Assistant City Attorney, George Deukmejian, John K. Van de Kamp, Attorneys General, R.H. Connett, N. Gregory Taylor, Assistant Attorneys General, Roderick E. Walston, Gregory K. Wilkinson, Jan S. Stevens, Dennis M. Eagan, M. Anne Jennings, Clifford T. Lee and Bruce S. Flushman, Deputy Attorneys General, John R. Bury, Tom P. Gilfoy, Philip Walsh, Jennifer Moran, Elizabeth J. Bigman, Carol E. Dinkins, United States Assistant Attorney General, Donald B. Ayer and Francis M. Goldsberry II, United States Attorneys, Stuart L. Somach and Mary Beth Uitti, Assistant United States Attorneys, Jacques B. Gelin, Richard J. Lazarus, Arthur L. Littleworth, Richard T. Anderson, Best, Best & Krieger for Real Parties in Interest.
*424 Downey, Brand, Seymour & Rohwer, Anne J. Schneider, DeBlanc & Alexander and Anthony E. Alexander as Amici Curiae on behalf of Real Parties in Interest.
George Agnost, City Attorney (San Francisco), McMorris M. Dow, Jerome B. Falk, Jr., Brian E. Gray and Howard, Rice, Nemerovski, Canady & Pollak as Amici Curiae.
OPINION
BROUSSARD, J.
Mono Lake, the second largest lake in California, sits at the base of the Sierra Nevada escarpment near the eastern entrance to Yosemite National Park. The lake is saline; it contains no fish but supports a large population of brine shrimp which feed vast numbers of nesting and migratory birds. Islands in the lake protect a large breeding colony of California gulls, and the lake itself serves as a haven on the migration route for thousands of Northern Phalarope, Wilson's Phalarope, and Eared Grebe. Towers and spires of tufa on the north and south shores are matters of geological interest and a tourist attraction.
Although Mono Lake receives some water from rain and snow on the lake surface, historically most of its supply came from snowmelt in the Sierra Nevada. Five freshwater streams Mill, Lee Vining, Walker, Parker and Rush Creeks arise near the crest of the range and carry the annual runoff to the west shore of the lake. In 1940, however, the Division of Water Resources, the predecessor to the present California Water Resources Board,[1] granted the Department of Water and Power of the City of Los Angeles (hereafter DWP) a permit to appropriate virtually the entire flow of four of the five streams flowing into the lake. DWP promptly constructed facilities to divert about half the flow of these streams into DWP's Owens Valley aqueduct. In 1970 DWP completed a second diversion tunnel, and since that time has taken virtually the entire flow of these streams.
As a result of these diversions, the level of the lake has dropped; the surface area has diminished by one-third; one of the two principal islands in the lake has become a peninsula, exposing the gull rookery there to coyotes and other predators and causing the gulls to abandon the former island. The ultimate effect of continued diversions is a matter of intense dispute, but there seems little *425 doubt that both the scenic beauty and the ecological values of Mono Lake are imperiled.[2]
Plaintiffs filed suit in superior court to enjoin the DWP diversions on the theory that the shores, bed and waters of Mono Lake are protected by a public trust. Plaintiffs' suit was transferred to the federal district court, which requested that the state courts determine the relationship between the public trust doctrine and the water rights system, and decide whether plaintiffs must exhaust administrative remedies before the Water Board prior to filing suit. The superior court then entered summary judgments against plaintiffs on both matters, ruling that the public trust doctrine offered no independent basis for challenging the DWP diversions, and that plaintiffs had failed to exhaust administrative remedies. Plaintiffs petitioned us directly for writ of mandate to review that decision; in view of the importance of the issues presented, we issued an alternative writ. (See County of Sacramento v. Hickman (1967) 66 Cal.2d 841, 845 [59 Cal. Rptr. 609, 428 P.2d 593].)
This case brings together for the first time two systems of legal thought: the appropriative water rights system which since the days of the gold rush has dominated California water law, and the public trust doctrine which, after evolving as a shield for the protection of tidelands, now extends its protective scope to navigable lakes. Ever since we first recognized that the public trust protects environmental and recreational values (Marks v. Whitney (1971) 6 Cal.3d 251 [98 Cal. Rptr. 790, 491 P.2d 374]), the two systems of legal thought have been on a collision course. (Johnson, Public Trust Protection for Stream Flows and Lake Levels (1980) 14 U.C. Davis L.Rev. 233.) They meet in a unique and dramatic setting which highlights the clash of values. Mono Lake is a scenic and ecological treasure of national significance, imperiled by continued diversions of water; yet, the need of Los Angeles for water is apparent, its reliance on rights granted by the board evident, the cost of curtailing diversions substantial.
Attempting to integrate the teachings and values of both the public trust and the appropriative water rights system, we have arrived at certain conclusions which we briefly summarize here. In our opinion, the core of the public trust doctrine is the state's authority as sovereign to exercise a continuous supervision and control over the navigable waters of the state and the lands underlying those waters. This authority applies to the waters tributary to Mono Lake and *426 bars DWP or any other party from claiming a vested right to divert waters once it becomes clear that such diversions harm the interests protected by the public trust. The corollary rule which evolved in tideland and lakeshore cases barring conveyance of rights free of the trust except to serve trust purposes cannot, however, apply without modification to flowing waters. The prosperity and habitability of much of this state requires the diversion of great quantities of water from its streams for purposes unconnected to any navigation, commerce, fishing, recreation, or ecological use relating to the source stream. The state must have the power to grant nonvested usufructuary rights to appropriate water even if diversions harm public trust uses. Approval of such diversion without considering public trust values, however, may result in needless destruction of those values. Accordingly, we believe that before state courts and agencies approve water diversions they should consider the effect of such diversions upon interests protected by the public trust, and attempt, so far as feasible, to avoid or minimize any harm to those interests.
The water rights enjoyed by DWP were granted, the diversion was commenced, and has continued to the present without any consideration of the impact upon the public trust. An objective study and reconsideration of the water rights in the Mono Basin is long overdue. The water law of California which we conceive to be an integration including both the public trust doctrine and the board-administered appropriative rights system permits such a reconsideration; the values underlying that integration require it.
With regard to the secondary issue of exhaustion of administrative remedies, the powers, experience, and expertise of the Water Board all argue in favor of granting that agency primary jurisdiction. Long-established precedent, however, declares that courts have concurrent jurisdiction in water right controversies. The Legislature, instead of overturning that precedent, has implicitly acknowledged its vitality by providing a procedure under which the courts can refer water rights disputes to the water board as referee. We therefore conclude that the courts may continue to exercise concurrent jurisdiction, but note that in cases where the board's experience or expert knowledge may be useful the courts should not hesitate to seek such aid.
1. Background and history of the Mono Lake litigation.
DWP supplies water to the City of Los Angeles. Early in this century, it became clear that the city's anticipated needs would exceed the water available from local sources, and so in 1913 the city constructed an aqueduct to carry water from the Owens River 233 miles over the Antelope-Mojave plateau into the coastal plain and thirsty city.
*427 The city's attempt to acquire rights to water needed by local farmers met with fierce, and at times violent, opposition. (See generally County of Inyo v. Public Utilities Com. (1980) 26 Cal.3d 154, 156-157 [161 Cal. Rptr. 172, 604 P.2d 566]; Kahrl, Water and Power: The Conflict Over Los Angeles' Water Supply in the Owens Valley (1982).) But when the "Owens Valley War" was over, virtually all the waters of the Owens River and its tributaries flowed south to Los Angeles. Owens Lake was transformed into an alkali flat.[3]
The city's rapid expansion soon strained this new supply, too, and prompted a search for water from other regions. The Mono Basin was a predictable object of this extension, since it lay within 50 miles of the natural origin of Owens River, and thus could easily be integrated into the existing aqueduct system.
After purchasing the riparian rights incident to Lee Vining, Walker, Parker and Rush Creeks, as well as the riparian rights pertaining to Mono Lake,[4] the city applied to the Water Board in 1940 for permits to appropriate the waters of the four tributaries. At hearings before the board, various interested individuals protested that the city's proposed appropriations would lower the surface level of Mono Lake and thereby impair its commercial, recreational and scenic uses.
The board's primary authority to reject that application lay in a 1921 amendment to the Water Commission Act of 1913, which authorized the board to reject an application "when in its judgment the proposed appropriation would not best conserve the public interest." (Stats. 1921, ch. 329, § 1, p. 443, now codified as Wat. Code, § 1255.)[5] The 1921 enactment, however, also "declared to be the established policy of this state that the use of water for domestic purposes is the highest use of water" (id., now codified as Wat. Code, § 1254), and directed the Water Board to be guided by this declaration of policy. Since DWP sought water for domestic use, the board concluded that it had to grant the application notwithstanding the harm to public trust uses of Mono Lake.[6]
*428 The board's decision states that "[i]t is indeed unfortunate that the City's proposed development will result in decreasing the aesthetic advantages of Mono Basin but there is apparently nothing that this office can do to prevent it. The use to which the City proposes to put the water under its Applications ... is defined by the Water Commission Act as the highest to which water may be applied and to make available unappropriated water for this use the City has, by the condemnation proceedings described above, acquired the littoral and riparian rights on Mono Lake and its tributaries south of Mill Creek. This office therefore has no alternative but to dismiss all protests based upon the possible lowering of the water level in Mono Lake and the effect that the diversion of water from these streams may have upon the aesthetic and recreational value of the Basin." (Div. Wat. Resources Dec. 7053, 7055, 8042 & 8043 (Apr. 11, 1940), at p. 26, italics added.)[7]
By April of 1941, the city had completed the extension of its aqueduct system into the Mono Basin by construction of certain conduits, reservoirs at Grant and Crowley Lakes, and the Mono Craters Tunnel from the Mono Basin to the Owens River. In the 1950's, the city constructed hydroelectric power plants along the system to generate electricity from the energy of the appropriated water as it flowed downhill into the Owens Valley. Between 1940 and 1970, the city diverted an average of 57,067 acre-feet of water per year from the Mono Basin. The impact of these diversions on Mono Lake was clear and immediate: the lake's surface level receded at an average of 1.1 feet per year.
In June of 1970, the city completed a second aqueduct designed to increase the total flow into the aqueduct by 50 percent.[8] Between 1970 and 1980, the city *429 diverted an average of 99,580 acre-feet per year from the Mono Basin. By October of 1979, the lake had shrunk from its prediversion area of 85 square miles to an area of 60.3 square miles. Its surface level had dropped to 6,373 feet above sea level, 43 feet below the prediversion level.[9]
No party seriously disputes the facts set forth above. However, the parties hotly dispute the projected effects of future diversions on the lake itself, as well as the indirect effects of past, present and future diversions on the Mono Basin environment.
DWP expects that its future diversions of about 100,000 acre-feet per year will lower the lake's surface level another 43 feet and reduce its surface area by about 22 square miles over the next 80 to 100 years, at which point the lake will gradually approach environmental equilibrium (the point at which inflow from precipitation, groundwater and nondiverted tributaries equals outflow by evaporation and other means). At this point, according to DWP, the lake will stabilize at a level 6,330 feet above the sea's, with a surface area of approximately 38 square miles. Thus, by DWP's own estimates, unabated diversions will ultimately produce a lake that is about 56 percent smaller on the surface and 42 percent shallower than its natural size.
Plaintiffs consider these projections unrealistically optimistic. They allege that, 50 years hence, the lake will be at least 50 feet shallower than it now is, and hold less than 20 percent of its natural volume. Further, plaintiffs fear that "the lake will not stabilize at this level," but "may continue to reduce in size until it is dried up." Moreover, unlike DWP, plaintiffs believe that the lake's gradual recession indirectly causes a host of adverse environmental impacts. Many of these alleged impacts are related to an increase in the lake's salinity, caused by the decrease in its water volume.
As noted above, Mono Lake has no outlets. The lake loses water only by evaporation and seepage. Natural salts do not evaporate with water, but are left behind. Prior to commencement of the DWP diversions, this naturally rising salinity was balanced by a constant and substantial supply of fresh water from the tributaries. Now, however, DWP diverts most of the fresh water inflow. The resultant imbalance between inflow and outflow not only diminishes the lake's size, but also drastically increases its salinity.
*430 Plaintiffs predict that the lake's steadily increasing salinity, if unchecked, will wreck havoc throughout the local food chain. They contend that the lake's algae, and the brine shrimp and brine flies that feed on it, cannot survive the projected salinity increase. To support this assertion, plaintiffs point to a 50 percent reduction in the shrimp hatch for the spring of 1980 and a startling 95 percent reduction for the spring of 1981. These reductions affirm experimental evidence indicating that brine shrimp populations diminish as the salinity of the water surrounding them increases. (See Task Force Report at pp. 20-21.) DWP admits these substantial reductions, but blames them on factors other than salinity.
DWP's diversions also present several threats to the millions of local and migratory birds using the lake. First, since many species of birds feed on the lake's brine shrimp, any reduction in shrimp population allegedly caused by rising salinity endangers a major avian food source. The Task Force Report considered it "unlikely that any of Mono Lake's major bird species ... will persist at the lake if populations of invertebrates disappear." (Task Force Report at p. 20.) Second, the increasing salinity makes it more difficult for the birds to maintain osmotic equilibrium with their environment.[10]
The California gull is especially endangered, both by the increase in salinity and by loss of nesting sites. Ninety-five percent of this state's gull population and 25 percent of the total species population nests at the lake. (Task Force Report at p. 21.) Most of the gulls nest on islands in the lake. As the lake recedes, land between the shore and some of the islands has been exposed, offering such predators as the coyote easy access to the gull nests and chicks. In 1979, coyotes reached Negrit Island, once the most popular nesting site, and the number of gull nests at the lake declined sharply. In 1981, 95 percent of the hatched chicks did not survive to maturity. Plaintiffs blame this decline and alarming mortality rate on the predator access created by the land bridges; DWP suggests numerous other causes, such as increased ambient temperatures and human activities, and claims that the joining of some islands with the mainland is offset by the emergence of new islands due to the lake's recession.
Plaintiffs allege that DWP's diversions adversely affect the human species and its activities as well. First, as the lake recedes, it has exposed more than *431 18,000 acres of lake bed composed of very fine silt which, once dry, easily becomes airborne in winds. This silt contains a high concentration of alkali and other minerals that irritate the mucous membranes and respiratory systems of humans and other animals. (See Task Force Report at p. 22.) While the precise extent of this threat to the public health has yet to be determined, such threat as exists can be expected to increase with the exposure of additional lake bed. DWP, however, claims that its diversions neither affect the air quality in Mono Basin nor present a hazard to human health.
Furthermore, the lake's recession obviously diminishes its value as an economic, recreational, and scenic resource. Of course, there will be less lake to use and enjoy. The declining shrimp hatch depresses a local shrimping industry. The rings of dry lake bed are difficult to traverse on foot, and thus impair human access to the lake, and reduce the lake's substantial scenic value. Mono Lake has long been treasured as a unique scenic, recreational and scientific resource (see, e.g., City of Los Angeles v. Aitken, supra, 10 Cal. App.2d 460, 462-463; Task Force Report at pp. 22-24), but continued diversions threaten to turn it into a desert wasteland like the dry bed of Owens Lake.
(1) (See fn. 1.) To abate this destruction, plaintiffs filed suit for injunctive and declaratory relief in the Superior Court for Mono County on May 21, 1979.[11] DWP moved to change venue. When the court granted the motion and transferred the case to Alpine County, DWP sought an extraordinary writ to bar this transfer. The writ was denied, and the Superior Court for Alpine County set a tentative trial date for March of 1980.
In January of that year, DWP cross-complained against 117 individuals and entities claiming water rights in the Mono Basin. On February 20, 1980, one cross-defendant, the United States, removed the case to the District Court for the Eastern District of California. On DWP's motion, the district court stayed its proceedings under the federal abstention doctrine[12] to allow resolution by *432 California courts of two important issues of California law: "1. What is the interrelationship of the public trust doctrine and the California water rights system, in the context of the right of the Los Angeles Department of Water and Power (`Department') to divert water from Mono Lake pursuant to permits and licenses issued under the California water rights system? In other words, is the public trust doctrine in this context subsumed in the California water rights system, or does it function independently of that system? Stated differently, can the plaintiffs challenge the Department's permits and licenses by arguing that those permits and licenses are limited by the public trust doctrine, or must the plaintiffs challenge the permits and licenses by arguing that the water diversions and uses authorized thereunder are not `reasonable or beneficial' as required under the California water rights system? [¶] 2. Do the exhaustion principles applied in the water rights context apply to plaintiffs' action pending in the United States District Court for the Eastern District of California?"[13]
(2) (See fn. 14.) In response to this order, plaintiffs filed a new complaint for declaratory relief in the Alpine County Superior Court.[14] On November 9, *433 1981, that court entered summary judgment against plaintiffs. Its notice of intended ruling stated that "[t]he California water rights system is a comprehensive and exclusive system for determining the legality of the diversions of the City of Los Angeles in the Mono Basin.... The Public Trust Doctrine does not function independently of that system. This Court concludes that as regards the right of the City of Los Angeles to divert waters in the Mono Basin that the Public Trust Doctrine is subsumed in the water rights system of the state." With respect to exhaustion of administrative remedies, the superior court concluded that plaintiffs would be required to exhaust their remedy before the Water Board either under a challenge based on an independent public trust claim or one based on asserted unreasonable or nonbeneficial use of appropriated water.
Plaintiffs filed a petition for mandate directly with this court to review the summary judgment of the Alpine County Superior Court. We issued an alternative writ and set the case for argument.
2. The Public Trust Doctrine in California.
"By the law of nature these things are common to mankind the air, running water, the sea and consequently the shores of the sea." (Institutes of Justinian *434 2.1.1.) From this origin in Roman law, the English common law evolved the concept of the public trust, under which the sovereign owns "all of its navigable waterways and the lands lying beneath them `as trustee of a public trust for the benefit of the people.'" (Colberg, Inc. v. State of California ex rel. Dept. Pub. Wks. (1967) 67 Cal.2d 408, 416 [62 Cal. Rptr. 401, 432 P.2d 3].)[15] The State of California acquired title as trustee to such lands and waterways upon its admission to the union (City of Berkeley v. Superior Court (1980) 26 Cal.3d 515, 521 [162 Cal. Rptr. 327, 606 P.2d 362] and cases there cited); from the earliest days (see Eldridge v. Cowell (1854) 4 Cal. 80, 87) its judicial decisions have recognized and enforced the trust obligation.[16]
Three aspects of the public trust doctrine require consideration in this opinion: the purpose of the trust; the scope of the trust, particularly as it applies to the nonnavigable tributaries of a navigable lake; and the powers and duties of the state as trustee of the public trust. We discuss these questions in the order listed.
(a) The purpose of the public trust.
The objective of the public trust has evolved in tandem with the changing public perception of the values and uses of waterways. As we observed in Marks v. Whitney, supra, 6 Cal.3d 251, "[p]ublic trust easements [were] traditionally defined in terms of navigation, commerce and fisheries. They have been held to include the right to fish, hunt, bathe, swim, to use for boating and general recreation purposes the navigable waters of the state, and to use the bottom of the navigable waters for anchoring, standing, or other purposes." (P. 259.) We went on, however, to hold that the traditional triad of uses navigation, commerce and fishing did not limit the public interest in the trust res. In language of special importance to the present setting, we stated that "[t]he public uses to which tidelands are subject are sufficiently flexible to encompass changing public needs. In administering the trust the state is not burdened with an outmoded classification favoring one mode of utilization over another. [Citation.] There is a growing public recognition that one of the most important public uses of the tidelands a use encompassed within the tidelands trust is the preservation of those lands in their natural state, so that they may *435 serve as ecological units for scientific study, as open space, and as environments which provide food and habitat for birds and marine life, and which favorably affect the scenery and climate of the area." (Pp. 259-260.)
(3) Mono Lake is a navigable waterway. (City of Los Angeles v. Aitken, supra, 10 Cal. App.2d 460, 466.) It supports a small local industry which harvests brine shrimp for sale as fish food, which endeavor probably qualifies the lake as a "fishery" under the traditional public trust cases. The principal values plaintiffs seek to protect, however, 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, it is clear that protection of these values is among the purposes of the public trust.
(b) The scope of the public trust.
Early English decisions generally assumed the public trust was limited to tidal waters and the lands exposed and covered by the daily tides (see Stevens, op. cit. supra, 14 U.C. Davis L.Rev. 195, 201 and authorities there cited); many American decisions, including the leading California cases, also concern tidelands. (See, e.g., City of Berkeley v. Superior Court (1980) 26 Cal.3d 515 [162 Cal. Rptr. 327, 606 P.2d 362]; Marks v. Whitney, supra, 6 Cal.3d 251; People v. California Fish Co. (1913) 166 Cal. 576 [138 P. 79].) (4) It is, however, well settled in the United States generally and in California that the public trust is not limited by the reach of the tides, but encompasses all navigable lakes and streams. (5) (See fn. 17.) (See Illinois Central Railroad Co. v. Illinois (1892) 146 U.S. 387 [36 L.Ed. 1018, 13 S.Ct. 110] (Lake Michigan); State of California v. Superior Court (Lyon) (1981) 29 Cal.3d 210 [172 Cal. Rptr. 696, 625 P.2d 239] (Clear Lake); State of California v. Superior Court (Fogerty) (1981) 29 Cal.3d 240 [172 Cal. Rptr. 713, 625 P.2d 256] (Lake Tahoe); People v. Gold Run D. & M. Co. (1884) 66 Cal. 138 [4 P. 1152] (Sacramento River); Hitchings v. Del Rio Woods Recreation & Park Dist. (1976) 55 Cal. App.3d 560 [127 Cal. Rptr. 830] (Russian River).)[17]
(6) Mono Lake is, as we have said, a navigable waterway. The beds, shores and waters of the lake are without question protected by the public trust. The streams diverted by DWP, however, are not themselves navigable. Accordingly, we must address in this case a question not discussed in any recent public trust case whether the public trust limits conduct affecting nonnavigable tributaries to navigable waterways.
*436 This question was considered in two venerable California decisions. The first, People v. Gold Run D. & M. Co., supra, 66 Cal. 138 [4 P. 1152], is one of the epochal decisions of California history, a signpost which marked the transition from a mining economy to one predominately commercial and agricultural. The Gold Run Ditch and Mining Company and other mining operators used huge water cannon to wash gold-bearing gravel from hillsides; in the process they dumped 600,000 cubic yards of sand and gravel annually into the north fork of the American River. The debris, washed downstream, raised the beds of the American and Sacramento Rivers, impairing navigation, polluting the waters, and creating the danger that in time of flood the rivers would turn from their channels and inundate nearby lands.
Although recognizing that its decision might destroy the remains of the state's gold mining industry, the court affirmed an injunction barring the dumping. The opinion stressed the harm to the navigability of the Sacramento River, "a great public highway, in which the people of the State have paramount and controlling rights." (P. 146.) Defendant's dumping, the court said, was "an unauthorized invasion of the rights of the public to its navigation." (P. 147.) Rejecting the argument that dumping was sanctioned by custom and legislative acquiescence, the opinion asserted that "the rights of the people in the navigable rivers of the State are paramount and controlling. The State holds the absolute right to all navigable waters and the soils under them.... The soil she holds as trustee of a public trust for the benefit of the people; and she may, by her legislature, grant it to an individual; but she cannot grant the rights of the people to the use of the navigable waters flowing over it...." (Pp. 151-152.)
In the second decision, People v. Russ (1901) 132 Cal. 102 [64 P. 111], the defendant erected dams on sloughs which adjoined a navigable river. Finding the sloughs nonnavigable, the trial court gave judgment for defendant. We reversed, directing the trial court to make a finding as to the effect of the dams on the navigability of the river. "Directly diverting waters in material quantities from a navigable stream may be enjoined as a public nuisance. Neither may the waters of a navigable stream be diverted in substantial quantities by drawing from its tributaries.... If the dams upon these sloughs result in the obstruction of Salt River as a navigable stream, they constitute a public nuisance." (P. 106.)
DWP points out that the Gold Run decision did not involve diversion of water, and that in Russ there had been no finding of impairment to navigation. But the principles recognized by those decisions apply fully to a case in which diversions from a nonnavigable tributary impair the public trust in a downstream river or lake. "If the public trust doctrine applies to constrain fills which destroy navigation and other public trust uses in navigable waters, it should equally apply to constrain the extraction of water that destroys navigation and *437 other public interests. Both actions result in the same damage to the public interest." (Johnson, Public Trust Protection for Stream Flows and Lake Levels (1980) 14 U.C. Davis L.Rev. 233, 257-258; see Dunning, The Significance of California's Public Trust Easement for California Water Rights Law (1980) 14 U.C. Davis L.Rev. 357, 359-360.)
We conclude that the public trust doctrine, as recognized and developed in California decisions, protects navigable waters[18] from harm caused by diversion of nonnavigable tributaries.[19]
(c) Duties and powers of the state as trustee.
In the following review of the authority and obligations of the state as administrator of the public trust, the dominant theme is the state's sovereign power and duty to exercise continued supervision over the trust. One consequence, of importance to this and many other cases, is that parties acquiring rights in trust property generally hold those rights subject to the trust, and can assert no vested right to use those rights in a manner harmful to the trust.
As we noted recently in City of Berkeley v. Superior Court, supra, 26 Cal.3d 515, the decision of the United States Supreme Court in Illinois Central Railroad Company v. Illinois, supra, 146 U.S. 387, "remains the primary authority even today, almost nine decades after it was decided." (P. 521.) The Illinois Legislature in 1886 had granted the railroad in fee simple 1,000 acres of submerged lands, virtually the entire Chicago waterfront. Four years later it sought to revoke that grant. The Supreme Court upheld the revocatory legislation. Its opinion explained that lands under navigable waters conveyed to private parties for wharves, docks, and other structures in furtherance of trust purposes could be granted free of the trust because the conveyance is consistent with the purpose of the trust. But the legislature, it held, did not have the power to convey the entire city waterfront free of trust, thus barring all future legislatures from protecting the public interest. The opinion declares that: "A grant of all the lands under the navigable waters of a State has never been adjudged to be within the legislative power; and any attempted grant of the kind would be held, if not absolutely void on its face, as subject to revocation. The State can no more abdicate its trust over property in which the whole people are interested, like navigable waters and soils under them, ... than it can abdicate its police powers in the administration of government and the preservation of *438 the peace. In the administration of government the use of such powers may for a limited period be delegated to a municipality or other body, but there always remains with the State the right to revoke those powers and exercise them in a more direct manner, and one more conformable to its wishes. So with trusts connected with public property, or property of a special character, like lands under navigable waterways, they cannot be placed entirely beyond the direction and control of the State." (Pp. 453-454 [36 L.Ed. pp. 1042-1043].)
Turning to the Illinois Central grant, the court stated that: "Any grant of the kind is necessarily revocable, and the exercise of the trust by which the property was held by the State can be resumed at any time. Undoubtedly there may be expenses incurred in improvements made under such a grant which the State ought to pay; but, be that as it may, the power to resume the trust whenever the State judges best is, we think, incontrovertible.... The ownership of the navigable waters of the harbor and of the lands under them is a subject of public concern to the whole people of the State. The trust with which they are held, therefore, is governmental and cannot be alienated, except in those instances mentioned of parcels used in the improvement of the interest thus held, or when parcels can be disposed of without detriment to the public interest in the lands and waters remaining." (Pp. 455-456 [36 L.Ed. p. 1043].)
The California Supreme Court indorsed the Illinois Central principles in People v. California Fish Co., supra, 166 Cal. 576 [138 P. 79]. California Fish concerned title to about 80,000 acres of tidelands conveyed by state commissioners pursuant to statutory authorization. The court first set out principles to govern the interpretation of statutes conveying that property: "[S]tatutes purporting to authorize an abandonment of ... public use will be carefully scanned to ascertain whether or not such was the legislative intention, and that intent must be clearly expressed or necessarily implied. It will not be implied if any other inference is reasonably possible. And if any interpretation of the statute is reasonably possible which would not involve a destruction of the public use or an intention to terminate it in violation of the trust, the courts will give the statute such interpretation." (Id., at p. 597.) Applying these principles, the court held that because the statute in question and the grants pursuant thereto were not made for trust purposes, the grantees did not acquire absolute title; instead, the grantees "own the soil, subject to the easement of the public for the public uses of navigation and commerce, and to the right of the state, as administrator and controller of these public uses and the public trust therefor, to enter upon and possess the same for the preservation and advancement of the public uses and to make such changes and improvements as may be deemed advisable for those purposes." (Id., at pp. 598-599.)
Finally, rejecting the claim of the tideland purchasers for compensation, the court stated they did not lose title, but retained it subject to the public trust. (See *439 pp. 599-601.) While the state may not "retake the absolute title without compensation" (p. 599), it may without such payment erect improvements to further navigation and take other actions to promote the public trust.[20]
Boone v. Kingsbury (1928) 206 Cal. 148 [273 P. 797], presents another aspect of this matter. The Legislature authorized the Surveyor-General to lease trust lands for oil drilling. Applying the principles of Illinois Central, the court upheld that statute on the ground that the derricks would not substantially interfere with the trust. (7) (See fn. 21.) Any licenses granted by the sta