Water Code section 5976
(a)
The California members of the commission shall consist of the Director of the Department of Water Resources of the State of California, and four (4) members appointed by the Governor of California, all of whom shall be residents of the State of California. One of the four members so appointed shall be a resident of the Lake Tahoe Basin, one shall be a resident of the Truckee River Basin, one shall be a resident of the Walker River Basin and one shall be a resident of the Carson River Basin.(b)
The Nevada members of the commission shall consist of the State Engineer of the State of Nevada (who additionally shall represent all Nevada areas not otherwise represented as herein provided), and four (4) members appointed by the Governor of Nevada, each of whom shall be a resident of the State of Nevada and represent a specific area therein as below defined, provided that the Governor shall not appoint any person a member of such commission if he determines that such person has a conflicting interest in California. One of the four members so appointed shall be a resident real property owner within and represent the Reno-Sparks metropolitan area (including adjacent agricultural area) and be fully qualified by knowledge and experience in connection with the water requirements and supply for such area; the other three members so appointed shall be representative of the common interests and goals of all water users of the area and each shall have broad practical experience in water management, and one shall be a resident real property owner within and represent the Walker River Basin in Nevada, another shall be a resident real property owner within and represent the Carson River Basin in Nevada upstream from Lahontan Reservoir, and the third shall be a resident real property owner within and represent the area within the Truckee-Carson Irrigation District in Nevada.(a)
All existing beneficial uses of water for domestic, municipal, industrial, and agricultural purposes in Nevada as determined by Nevada law as of that time together with the yield of Stampede Reservoir in excess of 6,000 acre-feet shall be recognized and not impaired by the development of such additional yield.(b)
Additional yields developed for use in California shall be limited to an amount not to exceed an aggregate of 10,000 acre-feet annually, and such development shall be for domestic, municipal, and industrial uses solely. California shall be allowed to deplete this allocation; provided, that in ascertaining the amount of depletion, credit for return flow shall be limited to the amounts of water which can be measured as a contribution to the Truckee River system.(c)
The right of the commission to permit Nevada to share in such additional yield upon participation by Nevada in bearing a proportionate cost of developing such additional yield.(a)
Whenever, after the first Monday in May or any day in that week or alternate weeks thereafter of any year the flow of the West Fork of the Carson River at said western boundary shall have fallen below 175 cubic feet per second, then, until October 31 next, water users in California who divert from the West Fork of the Carson River downstream from said western boundary shall rotate all or any portion of the natural flow of the West Fork of the Carson River necessary to satisfy the demand of Nevada lands with water users in Nevada every other week beginning with the week following that in which water is used in Nevada, and during each rotation period said California users shall be entitled to divert the natural flow of the West Fork of the Carson River during their rotation weeks.(b)
Rotation between water users in California and Nevada on the West Fork of the Carson River may be terminated in whole or in part upon approval of the commission for such termination, upon provision being made so that sufficient water is available by storage or exchange to assure that the water users in Nevada will receive at the same time the flow of water which would have been available to the Nevada water users under rotation.(c)
Stock water, domestic water, and water for fire protection purposes may be diverted downstream from said western boundary from the natural flow of the West Fork of the Carson River at all times by owners of irrigation water rights in California whose lands are contiguous to the West Fork of the Carson River; provided, however, that such diversion shall be limited to the amounts actually required to deliver water for such purposes, and any excess over the amount so diverted shall be returned to the West Fork of the Carson River whenever practicable. Water diverted under this provision shall not be converted to any other use. The commission or its designee shall rule on any challenge relative to the necessity and amount of water required for such purposes.(a)
The maximum quantity of water which can be diverted annually to storage is 85,000 acre-feet. No more than 85,000 acre-feet of water less reservoir evaporation can be rediverted for use within the district annually. The 85,000 acre-feet amount so allowed to be diverted to storage and rediverted to use include water used under direct diversion rights in Decree C-125 acquired by said district prior to 1964. For the purpose of this provision “annually” means the period from November 1 through October 31 of the following year.(b)
The maximum rate of diversion to such reservoir under such rights is 1,000 c.f.s.(c)
For the purpose of determining the availability of water to satisfy rights junior to the Topaz Reservoir storage rights of the Walker River Irrigation District, or for division between the states as unused water, water which has been stored, or is available for storage in and can be physically diverted to such reservoir under such reservoir rights but is released or is allowed to pass through the reservoir and is not rediverted to use in Nevada, shall be deemed to have been held in storage; provided, that until a new major storage project is constructed on the West Walker River, the foregoing shall not apply to the extent that said district with the concurrence of the watermaster determines, prior to the release or passing through of such water from Topaz Reservoir in any year, that it is necessary to release or pass through such water in order to provide storage space in Topaz Reservoir as a means of protecting lands in Nevada against flood damage later in the year.(a)
The maximum quantity of water which can be diverted to storage in any year is 57,000 acre-feet. No more than 57,000 acre-feet of water less reservoir evaporation can be rediverted for use within the district in any year. The 57,000 acre-feet amounts so allowed to be diverted to storage and rediverted to use include water used under direct diversion rights in said decree acquired by said district prior to 1964 except for water used under such rights prior to 1964 on lands owned by said district in Bridgeport Valley. For the purpose of this provision “year” means the period from November 1 of one calendar year to October 31 of the following calendar year.(b)
Water of the East Walker River and its tributaries may, adversely to the Bridgeport Reservoir storage rights hereinabove recognized and confirmed, be stored upstream from said reservoir in any year, for later use after the spring flood of the year in which the water was so stored, under rights junior to said reservoir rights; provided, that when the Walker River system is put on priority under Decree C-125 after the annual spring flood, or upon demand made prior to the spring flood for water necessary to satisfy early season demand, the watermaster shall make an accounting and water shall be released from said upstream storage in such amounts as determined by the watermaster to be necessary to satisfy said reservoir rights to the same extent as they would have been satisfied in the absence of said adverse upstream storage.(b)
In addition to rights recognized in subsection A.1 of this article there is allocated to Nevada for use on the Walker River Indian Reservation a maximum of 13,000 acre-feet per year for storage in Weber Reservoir and later rediversion to use and in addition 9,450 acre-feet per year to be diverted from natural flow. Both allocations shall have a priority of 1933. The season for diversion of water to storage shall be from November 1 to October 31 of the following year. The season for diversion of water directly for use shall be from March 1 to October 31 and at a maximum rate of 60 cubic feet per second. For the purpose of determining the availability of water to satisfy rights junior to this allocation or for division between the states as unused water, water which has been stored, or which can be physically stored or diverted to use under this allocation but is released or is allowed to pass through Weber Reservoir and is not rediverted to use on the Walker River Indian Reservation, shall be deemed to have been held in storage or used; provided, that the foregoing shall not apply to the extent that the appropriate representative of said reservation with the concurrence of the watermaster determines prior to the release or passing through of such water from Weber Reservoir in any year, that it is necessary to release or pass through such water in order to provide storage space in Weber Reservoir as a means of protecting lands in Nevada against flood damage later in the year; provided, further, that the foregoing shall not apply to passage of water of inferior quality to the extent that such passage may be necessary to maintain the water of suitable quality for irrigation on said reservation as determined by the commission.(a)
When all direct diversion rights under Decree C-125 are being satisfied and simultaneously water of the West Walker River is being diverted to storage pursuant to the Topaz Reservoir storage rights recognized and confirmed in subsection 2 of this Section A, but there is not flow in excess of that required to fully satisfy Topaz Reservoir storage rights, diversions in Antelope Valley in excess of the amounts to which Antelope Valley lands are entitled under Decree C-125 shall be permitted by the watermaster for such periods and in such amounts as, in the sound professional judgment of the watermaster, will not cause, on an overall irrigation season basis, any discernible net reduction in the amount of water available to satisfy said Topaz Reservoir storage rights.(b)
Such excess diversions may be used only on Antelope Valley lands entitled to water under Decree C-125 which can be served from the ditch systems existing as of the effective date of this compact.(c)
The allocation in this subsection 5 shall terminate after construction of a new major storage project on the West Walker River upstream from Antelope Valley.(a)
The reregulation by storage of waters allocated for storage shall not be considered as the development of “unused water”.(a)
Should a separate surface storage project or projects be constructed in Nevada to develop Nevada’s share of the unused water of the West Walker River, California may thereafter store and use said unused water allocated to Nevada adverse to such Nevada storage projects, provided that, without charge to Nevada, California makes available for consumptive use in Nevada, water in the same amounts, at the same times, and in the same places as would have been available for use in Nevada from such Nevada storage projects had California not so stored and used said unused water allocated to Nevada; and provided further that Nevada shall not be deprived of water required for: (1) maintenance of a minimum reservoir level for the preservation of fish life and (2) nonconsumptive uses which are found by the commission to be in the public interest of the Walker River Basin as a whole.(b)
From time to time after construction of each surface storage project upstream from Topaz Reservoir, for development of the unused water allocated herein, the commission shall determine the amounts of water which may be diverted and used in each state pursuant to its allocation as the result of the construction and operation of such project. In making such determination the commission shall compute any increase of yield of previously constructed reservoirs which may result from operation of such project constructed to develop unused water and shall include such increase in the amounts of water which may be diverted and used in each of the two states pursuant to its allocation of unused water.(a)
Within the Walker River Basin;(b)
Within the portion of Artesia Lake Basin south of the northern township line of Tier 12 North and west of a line one mile east of the eastern range line of Range 23 East, Mount Diablo Base Line and Meridian;(c)
Within the portion of Mason Valley and Adrian Valley south of the northern township line of Tier 15 North, Mount Diablo Base Line;(d)
Within the area tributary to Topaz Lake; or(e)
Any combination of the above areas.(1)
It shall have been ratified by acts of the Legislature of each of the States of California and Nevada;(2)
It shall have been consented to by act of Congress of the United States; and(3)
Congress provides in its consent legislation or by separate legislation that the following provisions of the compact shall be binding on the agencies, wards, and instrumentalities of the United States of America:
Source:
Section 5976, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=WAT§ionNum=5976.
(accessed Apr. 24, 2025).