Snohomish Basin Protection Plan
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SNOHOMISH BASIN PROTECTION PLAN December 2015 Prepared by Snohomish County Surface Water Management King County Snoqualmie Watershed Forum Staff Tulalip Tribes Natural Resources Department ACKNOWLEDGEMENTS Steering Committee Tulalip Tribes – Terry Williams Snohomish County – Debbie Terwilleger, Gregg Farris King County – Joan Lee Wild Fish Conservancy – Jamie Glasgow Trout Unlimited – Kate Miller Puget Sound Partnership – Susan O’Neil, Heather Cole Washington State University Extension – Kevin Zobrist U.S. Forest Service – Joe Neal Forterra – Skip Swenson Washington Department of Fish and Wildlife – Kirk Lakey Washington Department of Natural Resources – Doug McClelland City of Snohomish – Ann Stanton Project Team Snohomish County Surface Water Management staff (Ann Bylin, Mike Rustay, Denise DiSanto, Karen Stewart, Beth Liddell, and Paul Marczin), Tulalip Tribes Natural Resources staff (Daryl Williams, Morgan Ruff, and Josh Kubo), and Snoqualmie Watershed Forum staff (Beth leDoux, Janne Kaje, and Perry Falcone) with consultant assistance from Hook Environmental, Parametrix, and Anchor QEA. This project has been funded wholly or in part by the U.S. Environmental Protection Agency under assistance agreement PO 00J09701 to Snohomish County Public Works. The contents of this document do not necessarily reflect the views and policies of the Environmental Protection Agency, nor does mention of trade names or commercial products constitute endorsement or recommendation for use. Additional match funding was provided by Snohomish County, King County, and Tulalip Tribes. Recommended Citation Snohomish County Surface Water Management, King County Snoqualmie Watershed Forum Staff, and Tulalip Tribes Natural Resources Department, 2015. Snohomish Basin Protection Plan. Snohomish Basin Salmon Recovery Forum. Everett, WA. EXECUTIVE SUMMARY The primary goal of this 2015 Snohomish Basin Protection Plan (SBPP) is to identify protection strategies that prevent the degradation of hydrologic processes that support salmon or salmon habitat. In 2005, the Snohomish Basin Salmon Recovery Forum members approved the Snohomish Basin Salmon Conservation Plan and laid out a 50-year road map for multi- species recovery. The 2005 Plan was based on historical records, the best available science, and social and economic conditions. The Plan recognized that it was critical to use adaptive management to increase the chance of success by incorporating new data, information about successes and failures, and new opportunities provided by changing context in the Snohomish River Basin. Since 2005, there have been many site-scale successes on restoration projects in the mainstems, estuaries and tributaries. However, many environmental indicators continue to decline, according to local data and the 2009 State of the Sound report (Puget Sound Partnership 2010). The continued decline is likely due to little-understood cumulative effects that need to be addressed through protection at the landscape-scale. Snohomish Basin Hydrology—Supporting People, Wildlife, and Fish The Snohomish River Basin contains diverse aquatic resources, a variety of fish and wildlife populations of local and regional significance, and a diverse portfolio of land uses. The Basin and its many natural resources and human communities are inextricably linked to how water moves through space and time, from the smallest headwater streams to mainstem rivers and the groundwater beneath the surface. December 2015 Snohomish Basin Protection Plan ES-1 Hydrology in the Snohomish, Snoqualmie, and Skykomish rivers and associated tributaries is changing. Historical flow patterns and volumes are shifting as a result of changing land uses and climate change. Human activities—such as impervious surface installation, tree cover removal, traditional stormwater conveyance systems, and water withdrawals—are contributing to altered watershed processes, degraded water quality, loss of wetlands and riparian forests, and degraded shoreline conditions. Investigating Protection of Snohomish Basin Hydrology The continued degradation of hydrology in the Basin, rapid urbanization, and threats from climate change motivated a new effort focused on the protection of the water resources in the Basin and the watershed processes that support them. This SBPP identifies areas that are important to the goal of protecting hydrology, and examines new and existing tools to help support that goal. Through the protection of hydrology, the SBPP aims to ultimately protect habitat quality, quantity, and heterogeneity for fish and wildlife. The protection of hydrology will also support a continued high quality of life for those who live and work in the Basin, help ameliorate flood risks, and ensure the availability of water for multiple uses into the future. To best characterize the different challenges, hydrological importance, and opportunities in each area, an approach was developed that incorporates information on land use, expected climate change impacts, services provided by hydrology, salmon use, existing protection measures, and possible improvements to policies, programs, and projects. The Puget Sound Watershed Characterization model was used to understand the importance of different components of hydrology at various scales and to Photo credit: Greg Dunlap describe the level of hydrological degradation. Assessment of the components of hydrology resulted in the development of ES-2 Snohomish Basin Protection Plan December 2015 basic protection strategies and aided in the assessment of tools to The consequences of not achieve protective actions. implementing protective measures for hydrology in the Snohomish Basin The Snohomish Basin Protection Plan include the following: • Loss of habitat for salmon The intent of the SBPP is to set a framework for a more and other aquatic species complete implementation and accounting of protection efforts • Continued degradation of water quality by all Basin partners. Section 1 of the SBPP provides the Basin • Decreased ability to protection context and more details on the intended purposes of mitigate drought this document. Section 2 describes the technical assessment conditions • Negative impacts on in- approach and Section 3 summarizes the results of the technical stream flows assessment (with additional details provided in Appendix A). • Risk of loss of life and infrastructure during flood events Section 4 of the SBPP provides an overview of protection tools • Lost opportunity to protect ecosystem that can be a starting point for planners and others to consider function in combination with local hydrology concerns, land use types, • High future costs of fish use, and implementation opportunities. The tools include a restoration range of existing programs in their current form, existing Although a lot of good work programs with suggestions for improvements, and entirely new is being done through existing policy and tools. Section 5 presents an assessment of current and potential programs, water quality has future funding strategies to support SBPP objectives. continued to degrade and with the challenges of drought and extreme flow Section 6 presents a summary example of how the SBPP can events, the Basin’s natural hydrologic regime has been guide the development of protection strategies towards a significantly altered. It is specific program goal—in this case, salmon recovery—and more cost effective to provides updates on information developed since the 2005 protect hydrology now than to pay later for restoration Snohomish Basin Salmon Conservation Plan. Appendix B actions and projects. provides more detailed recommendations for updated salmon recovery protection strategies relative to specific land uses in the Basin. In December 2015, the Snohomish Basin Salmon Recovery Forum adopted Appendix B as the first formal adaptive management action for the 2005 Plan. This protection update does not change existing restoration recommendations and habitat goals from the 2005 Plan. December 2015 Snohomish Basin Protection Plan ES-3 It has been 10 years since the 2005 Plan was adopted by the Forum, with broad support of jurisdictions operating in the Basin. Much has been accomplished in the realm of habitat restoration, yet landscape-scale indicators—such as total forest cover and water temperature—continue to show degradation. The intent of this SBPP is to provide an update to the 2005 Plan, and to serve as planning guidance to achieve greater protection of hydrology and, in turn, salmon habitat. This SBPP was developed at a time when there is recognition for the need to create watershed and ecosystem resilience in the face of growing populations and changing climatic conditions. Just as restoration relies on partnerships and collaboration, protection of hydrology and habitat cannot be undertaken in isolation, or by one entity, group, or agency. As stated by the original chairs Photo credit: flickr user brewbooks of the Forum, “we know that to recover salmon in Puget Sound, we must succeed in the Snohomish Basin.” ES-4 Snohomish Basin Protection Plan December 2015 TABLE OF CONTENTS ACKNOWLEDGEMENTS EXECUTIVE SUMMARY .................................................................................................... ES-1 LIST OF ACRONYMS AND ABBREVIATIONS .................................................................... vii SECTION 1 INTRODUCTION AND BASIN PROTECTION CONTEXT ........................ 1-1 1.1 The Importance of Hydrology in the Basin ...............................................................