Washington’s Np Buffer Rule Raises National Questions About HCP Governance
Small and large forest landowners in Washington are litigating the Forest Practices Board’s decision to adopt new riparian buffer requirements on non-fish perennial (Np) streams. The case is not simply about buffer widths. It raises a broader question: whether a multi-party Habitat Conservation Plan (HCP), which aims to provide long-term regulatory certainty, can be altered through reinterpretation instead of following the science-based adaptive management process.
Washington’s Forests & Fish framework, negotiated in 1999, was created to resolve conflicts between timber production, salmon recovery, and water quality protection. The agreement, later formalized in the 2006 Forest Practices Habitat Conservation Plan, governs 9.2 million acres of forest lands and 60,000 stream miles. It was designed to meet both Endangered Species Act and Clean Water Act obligations and established a science-based adaptive management program to make rule changes. Regulatory adjustments occur only when monitoring demonstrates that resource objectives are not being met. The new Np buffer rule adopted in November 2025 significantly expands continuous buffers along non-fish streams without demonstrating a scientific need for the change. The impact is projected to set aside more than 200,000 acres of private forestland, reduce private harvest by 4–8 percent, and close one to two sawmills. The reduction will affect 2,000 jobs and eliminate enough wood to build 15,000 homes each year. Foregone timber value is estimated at $1–1.8 billion, with broader economic impacts of $5–8 billion over a rotation, and removes approximately $90 million in county tax revenue.
The legal challenge filed by the Washington Forest Protection Association and Washington Farm Forestry Association does not dispute salmon recovery goals. Instead, it focuses on how the Np rule was adopted without demonstrating impairment to resource objectives laid out in the HCP framework. The new Np rule proceeded through the adaptive management process, including technical workgroup analysis, policy deliberation, dispute resolution, and majority and minority proposals. However, during that process, the Dept of Ecology (Ecology) introduced a new interpretation of Tier II antidegradation that effectively required “no measurable change” in temperature post-harvest.
This reinterpretation was not a result of a change in water quality standards; instead, Ecology misapplied the standards within adaptive management to fit an outcome they were seeking. The “no measurable change” reinterpretation constrained the range of alternatives considered and redirected the scientific evaluation toward a single outcome. As a result, the process was followed procedurally, but the decision space was narrowed before alternatives could be fully evaluated against the HCP’s resource objectives and performance targets.
That adaptive management framework is designed to provide predictability and balance conservation outcomes with economic impacts. The plaintiffs argue that by inserting a new policy interpretation into adaptive management—rather than demonstrating failure of resource objectives—the decision did not follow the rigor contemplated by the HCP.
The implications extend beyond Washington. Many HCPs rely on an adaptive management process to address scientific uncertainty to balance conservation and working land uses. If reinterpretations can redefine standards within adaptive management and limit alternatives considered, the predictability guaranteed in these long-term agreements may be weakened, creating uncertainty for landowners, agencies, and communities that depend on long-term conservation frameworks.
The lawsuit asks the court to determine whether the Forest Practices Board (Board) applied the correct legal standards, whether the Washington Dept of Ecology’s Tier II antidegradation interpretation was properly applied. The relief request is to vacate the rule or remand it back to the Board for reconsideration. At its core, the case asks a governance question with national implications: when an HCP establishes science-based objectives and a defined process for change, can that process be redirected through reinterpretation rather than through science demonstrating the need for change?
