Unless otherwise specified, a reservoir permit will allow the permittee to fill the reservoir once a year. The permit specifically states the period during which the reservoir is filled. Any entity proposing to use water stored in a reservoir must file for a permit to use water, which must refer to the reservoir as its source of water. As discussed in the Aquatic Resources Section, a dam or other obstruction across or in a stream must be equipped with a durable and efficient fishway approved by Fish and Wildlife. Processing of a permit to use water varies depending on project complexity.
Public notice is required for applications.
To the extent that water is used under the terms of the permit, a water right is perfected and a Certificate of Water Right is issued to document the water right. Changes of water rights, including interties between domestic supplies, must also be reviewed and approved by Ecology. Municipalities or others reclaiming treated water from sewage treatment plants may also require a new water use permit or a change to their existing permit. This would be required only if the intended use, or place of use, is different that that already permitted through an existing water use permit. As provided for by Chapter 90.16 RCW, any entity claiming the right to use water for power production must pay an annual fee to the state.