Are cities required to adopt the Department of Ecology's standards for wetland buffers?
No. The Growth Management Act does not establish specific buffers or setbacks for wetlands and streams. The Department of Ecology has established standard buffer widths as statewide standards for Category I, II, III and IV wetlands (see Department of Commerce "Critical Areas Assistance Handbook). These recommended buffer widths are used in conjunction with the state's original four-tiered rating system published in 1991. These buffer widths are based upon best available science to protect all wetlands found throughout the state. It is intended that local governments consider their specific natural resources and environmental setting to tailor these standard buffer widths to protect wetlands in their jurisdiction. Basically, this means that local governments are not required to follow the standard buffer widths established by Ecology. The actual buffers and setbacks adopted by Washington jurisdictions differ somewhat from the Ecology standards.
The Department of Ecology recommended buffer widths are listed in the Department of Commerce "Critical Areas Assistance Handbook" on pp. 62-63. These are recommended widths but are not mandated requirements. Ecology is now developing a new rating system for wetlands as part of the department's work on Best Available Science, and has issued Volume 1, regarding "Freshwater Wetlands in Washington State." The second volume of the Ecology BAS document contains protection options and recommendations and guidance for protecting and managing wetlands.
You may also be interested in the Best Available Science (BAS) requirements of the GMA outlined in RCW 36.70A.172. The requirements for BAS are included in the Washington Administrative Code 365-195-900 - 365-195-925 (See Part Nine - Best Available Science). This regulation describes what constitutes best available science and how local governments should identify, evaluate and include it in their critical-areas policies and regulations. BAS can be described as research conducted by qualified individuals using documented methodologies, the information reviewed by qualified scientific experts, and the criticisms addressed by the proponents.
The determination of "best available science" is the local jurisdiction's responsibility as part of the development of its critical areas policies and regulations. See the following excerpt from WAC 365-195-905:
(3) The responsibility for including the best available science in the development and implementation of critical areas policies or regulations rests with the legislative authority of the county or city. However, when feasible, counties and cities should consult with a qualified scientific expert or team of qualified scientific experts to identify scientific information, determine the best available science, and assess its applicability to the relevant critical areas. The scientific expert or experts may rely on their professional judgment based on experience and training, but they should use the criteria set out in WAC 365-195-900 through 365-195-925 and any technical guidance provided by the department. Use of these criteria also should guide counties and cities that lack the assistance of a qualified expert or experts, but these criteria are not intended to be a substitute for an assessment and recommendation by a qualified scientific expert or team of experts.
The following are Web links to information on wetland buffers:
- Department of Commerce - Critical Areas Assistance Handbook, November 2003 (see section on "Wetland Buffers," p. 61+) and Appendix A - Example Code Provisions for Designating and Protecting Critical Areas.
- Department of Ecology, Freshwater Wetlands in Washington State - Vol. 1 (In particular see Chapter 5, section 5.5 - Buffers, p. 5-20+)
- Focus Sheet: Best Available Science for Wetlands, Washington State Department of Ecology
- Department of Commerce Technical Bulletin 1.2 - GMA Updates: Counties and Cities Fully Planning Under GMA
- Chapter 365-195 WAC - Growth Management Act - Procedural Criteria for Adopting Comprehensive Plans and Development Regulations
- Wetland Buffers: An Annotated Bibliography, Dept. of Ecology, 1992
- Wetland Buffers: Use and Effectiveness, Dept. of Ecology, 1992
- King County Bar Association Article - "Critical Areas Updates: The 300-Foot Gorilla," By Theda Braddock Fowler
Local Government Web pages on Wetlands