Acquisition or donation of trust water rights.
RCW 90.38.020
in effect(1)(a) The department may acquire water rights, including but not limited to storage rights, by purchase, lease, gift, or other appropriate means other than by condemnation, from any person or entity or combination of persons or entities. Once acquired, such rights are trust water rights. A water right acquired by the state that is expressly conditioned to limit its use to instream purposes shall be administered as a trust water right in compliance with that condition. (b) If the holder of a right to water from a body of water chooses to donate all or a portion of the person's water right to the trust water system to assist in providing instream flows on a temporary or permanent basis, the department shall accept the donation on such terms as the person may prescribe as long as the donation satisfies the requirements of subsection (4) of this section and the other applicable requirements of this chapter and the terms prescribed are relevant and material to protecting any interest in the water right retained by the donor. Once accepted, such rights are trust water rights within the conditions prescribed by the donor. (2) The department may make such other arrangements, including entry into contracts with other persons or entities as appropriate to ensure that trust water rights acquired in accordance with this chapter can be exercised to the fullest possible extent. (3) The trust water rights may be acquired on a temporary or permanent basis. (4) A water right donated under subsection (1)(b) of this section shall not exceed the extent to which the water right was exercised during the five years before the donation nor may the total of any portion of the water right remaining with the donor plus the donated portion of the water right exceed the extent to which the water right was exercised during the five years before the donation. A water right holder who believes his or her water right has been impaired by a trust water right donated under subsection (1)(b) of this section may request that the department review the impairment claim. If the department determines that exercising the trust water right resulting from the donation or exercising a portion of that trust water right donated under subsection (1)(b) of this section is impairing existing water rights in violation of RCW 90.38.902 , the trust water right shall be altered by the department to eliminate the impairment. Any decision of the department to alter or not alter a trust water right donated under subsection (1)(b) of this section is appealable to the pollution control hearings board under RCW 43.21B.230 . A donated water right's status as a trust water right under this subsection is not evidence of the validity or quantity of the water right. (5) Any water right conveyed to the trust water right system as a gift that is expressly conditioned to limit its use to instream purposes shall be managed by the department for public purposes to ensure that it qualifies as a gift that is deductible for federal income taxation purposes for the person or entity conveying the water right. (6) If the department acquires a trust water right by lease, the amount of the trust water right shall not exceed the extent to which the water right was exercised during the five years before the acquisition was made nor may the total of any portion of the water right remaining with the original water right holder plus the portion of the water right leased by the department exceed the extent to which the water right was exercised during the five years before the acquisition. A water right holder who believes his or her water right has been impaired by a trust water right leased under this subsection may request that the department review the impairment claim. If the department determines that exercising the trust water right resulting from the leasing or exercising of a portion of that trust water right leased under this subsection is impairing existing water rights in violation of RCW 90.38.902 , the trust water right shall be altered by the department to eliminate the impairment. Any decision of the department to alter or not to alter a trust water right leased under this subsection is appealable to the pollution control hearings board under RCW 43.21B.230 . The department's leasing of a trust water right under this subsection is not evidence of the validity or quantity of the water right. (7) For a water right donated to or acquired by the trust water rights program on a temporary basis, the full quantity of water diverted or withdrawn to exercise the right before the donation or acquisition shall be placed in the trust water rights program and shall revert to the donor or person from whom it was acquired when the trust period ends.
(1)(a) The department may acquire water rights, including but not limited to storage rights, by purchase, lease, gift, or other appropriate means other than by condemnation, from any person or entity or combination of persons or entities. Once acquired, such rights are trust water rights. A water right acquired by the state that is expressly conditioned to limit its use to instream purposes shall be administered as a trust water right in compliance with that condition.
(b) If the holder of a right to water from a body of water chooses to donate all or a portion of the person's water right to the trust water system to assist in providing instream flows on a temporary or permanent basis, the department shall accept the donation on such terms as the person may prescribe as long as the donation satisfies the requirements of subsection (4) of this section and the other applicable requirements of this chapter and the terms prescribed are relevant and material to protecting any interest in the water right retained by the donor. Once accepted, such rights are trust water rights within the conditions prescribed by the donor.
(2) The department may make such other arrangements, including entry into contracts with other persons or entities as appropriate to ensure that trust water rights acquired in accordance with this chapter can be exercised to the fullest possible extent.
(3) The trust water rights may be acquired on a temporary or permanent basis.
(4) A water right donated under subsection (1)(b) of this section shall not exceed the extent to which the water right was exercised during the five years before the donation nor may the total of any portion of the water right remaining with the donor plus the donated portion of the water right exceed the extent to which the water right was exercised during the five years before the donation. A water right holder who believes his or her water right has been impaired by a trust water right donated under subsection (1)(b) of this section may request that the department review the impairment claim. If the department determines that exercising the trust water right resulting from the donation or exercising a portion of that trust water right donated under subsection (1)(b) of this section is impairing existing water rights in violation of RCW 90.38.902 , the trust water right shall be altered by the department to eliminate the impairment. Any decision of the department to alter or not alter a trust water right donated under subsection (1)(b) of this section is appealable to the pollution control hearings board under RCW 43.21B.230 . A donated water right's status as a trust water right under this subsection is not evidence of the validity or quantity of the water right.
(5) Any water right conveyed to the trust water right system as a gift that is expressly conditioned to limit its use to instream purposes shall be managed by the department for public purposes to ensure that it qualifies as a gift that is deductible for federal income taxation purposes for the person or entity conveying the water right.
(6) If the department acquires a trust water right by lease, the amount of the trust water right shall not exceed the extent to which the water right was exercised during the five years before the acquisition was made nor may the total of any portion of the water right remaining with the original water right holder plus the portion of the water right leased by the department exceed the extent to which the water right was exercised during the five years before the acquisition. A water right holder who believes his or her water right has been impaired by a trust water right leased under this subsection may request that the department review the impairment claim. If the department determines that exercising the trust water right resulting from the leasing or exercising of a portion of that trust water right leased under this subsection is impairing existing water rights in violation of RCW 90.38.902 , the trust water right shall be altered by the department to eliminate the impairment. Any decision of the department to alter or not to alter a trust water right leased under this subsection is appealable to the pollution control hearings board under RCW 43.21B.230 . The department's leasing of a trust water right under this subsection is not evidence of the validity or quantity of the water right.
(7) For a water right donated to or acquired by the trust water rights program on a temporary basis, the full quantity of water diverted or withdrawn to exercise the right before the donation or acquisition shall be placed in the trust water rights program and shall revert to the donor or person from whom it was acquired when the trust period ends.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=90.38&full=trueFetched: 6/29/2026