The technical provisions in WAC 220-660-090 through 220-660-450 represent common technical provisions for the protection of fish life for typical hydraulic projects proposed to the department. Implementing these provisions is necessary to minimize project-specific and cumulative impacts to fish life. These provisions reflect the current and best science, technology, and construction practices related to the protection of fish life. The department will incorporate new science and technology as it becomes available, and will allow alternative practices that provide equal or greater protection for fish life.
The technical provisions will apply to a hydraulic project when included as provisions in the hydraulic project approval (HPA). The department will review each application on an individual basis. Common technical provisions may be modified or omitted by the department for a specific project pursuant to WAC 220-660-070. HPAs may also have special technical provisions to address project-specific or site-specific considerations not adequately addressed by the common technical provisions. All hydraulic projects must also meet the applicable mitigation requirements in WAC 220-660-080 and any other provisions included in the HPA.
In addition to the rules in this chapter, the department has developed guidance to help applicants. This guidance reflects the department's experience and expertise with various types of hydraulic projects. Following the guidance will help ensure that a hydraulic project adequately protects fish life and will speed the department's review and decision process. Guidance documents are available on the department's website.
[Statutory Authority: RCW 77.04.012, 77.04.055, 77.04.020, 77.55.021, 77.55.091, 77.55.181, 77.12.047, and 34.05.328. WSR 26-15-073 (Order 26-13), s 220-660-020, filed 7/15/26, effective 8/15/26. Statutory Authority: RCW 77.04.012, 77.04.020, and 77.12.047. WSR 15-02-029 (Order 14-353), ยง 220-660-020, filed 12/30/14, effective 7/1/15.]