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EAGLE RIVER INVENTORY AND ASSESSMENT Report prepared for the: August 2005 Colorado State University Engineering Research Center Fort Collins, CO 80523 EAGLE RIVER INVENTORY AND ASSESSMENT Report prepared for the Eagle River Watershed Council By Brian Bledsoe, Ph.D. John Meyer Elaina Holburn Christopher Cuhaciyan Stephen Earsom Keith Olson Ben Snyder August 2005 Colorado State University Engineering Research Center Fort Collins, CO 80523 August 2005 Dear Stakeholder: On behalf of the Eagle River Watershed Council, we are proud to present the results of the Eagle River Inventory and Assessment. It is our hope that you find this report informative, interesting and a useful tool for future management decisions in the Eagle River watershed. Conclusions drawn in previous studies have been incorporated with new information gathered in 2003-4 to provide a comprehensive, up-to-date look at the river system and the many uses it supports. Most people will find what they need in the Executive Summary, but readers looking for more specific information can benefit from the full report and appendices. The project coalesced in 2002, when evidence dictated a clear need to develop a scientifically-based inventory detailing the condition of the Eagle River to assist with decisions regarding river restoration, conservation, and access. After reviewing the goals of the Eagle River Watershed Plan developed in 1996, and meeting with many people who live, work and play along the river, we decided the Inventory and Assessment should integrate scientific data with public desires to assist in making more responsible choices for the health and conservation of the watershed. This cooperative effort involved natural resource agencies, local governments, outfitters and guides, and citizens interested in land and water resources. A wide variety of input from across the Eagle Valley, the region and the state contributed to the success of the project. The primary objectives sought to create an inclusive, baseline inventory and assessment of the 110 miles of the main stem and lower tributaries of the Eagle River, as well as develop a set of recommendations to efficiently guide future river conservation work. The report provides a prioritized list of restoration and conservation projects, including brief descriptions and cost estimates. The Inventory and Assessment measures public support for various, prospective projects and other recommended action throughout the river corridor. From the headwaters to the Colorado River, the report synthesizes ecological and social benefits to the river and local communities. This is an essential tool for decision makers to ensure financial resources are spent in areas of noted ecological priority combined with strong community support. The success of the process and the report will ultimately be measured by the ability of the Eagle River Watershed Council to assist local decision-makers, community members, and regional and national funding partners in selecting projects to pursue for implementation. Also, we believe that the seven recommendations outlined in the report can function as “management principles” to ensure the health and conservation of the river well into the future. If you have questions or comments about this report, please contact the Eagle River Watershed Council at (970) 827-5406 or email us at [email protected]. Thanks for your participation, and we’ll see you on the river! Caroline Bradford Joe Macy Executive Director President, Board of Directors Acknowledgements The Eagle River Watershed Council wishes to acknowledge the efforts of its many sponsors and contributors in this undertaking. Tackling a project of this size and scope is a daunting escapade for all but the very committed. The Eagle River Watershed Council is grateful for the support of many talented as well as generous participants, stakeholders and funding partners. We owe an enormous debt to their backing and commitment and wish to thank our finding partners for their support of this research. Primary funding for the Eagle River Inventory and Assessment was provided by: Great Outdoors Colorado Colorado Watershed Protection Eagle County, Colorado Tax Check-off Fund Colorado Water Conservation Board NOTICE AND DISCLAIMER OF WARRANTY The information contained herein is provided as a public service with the understanding that Colorado State University makes no warranties, either expressed or implied, concerning the accuracy, completeness, reliability, or suitability of the information. The data, analysis, conclusions and recommendations contained in this report constitute the opinions of its authors, based on the study methods described herein, and are subject to change if additional data are discovered or provided. Nothing in this report is intended to serve as a basis for, or response to, any claim, defense, evidence, or expert opinion in relation to any legal or administrative action concerning the presence, nature, extent, cleanup, or remediation of hazardous substances, toxic waste or contamination in any of the areas investigated. Any recommendations herein regarding steps to improve water quality are not intended to meet any applicable regulatory and/or remediation standards imposed by law or regulation such as EPA, CDPHE or similar requirements, nor to protect public health or safety, nor address natural resource damages or economic losses of any party. Eagle River Inventory and Assessment i EXECUTIVE SUMMARY The Eagle River watershed is an extraordinary resource that providing a host of ecosystem services and benefits. It is also a system characterized by complexity and change. With a rapidly growing population focusing land use conversions in and near the river corridor coupled with growing pressures for water from within and without, the fate of the Eagle River is increasingly determined by our decisions and stewardship. This report describes the results of the Eagle River Inventory and Assessment (ERIA), a joint effort of Colorado State University (CSU) and the Eagle River Watershed Council (ERWC) to assess the current state of the Eagle River watershed from a basinwide ecological perspective and to prioritize potential restoration activities to improve the integrity of the river system. The objectives of the Eagle River Inventory and Assessment are: 1. Undertake a systematic, watershed-wide inventory of channel, riparian, and upland characteristics that currently control the ecological integrity of the Eagle River. 2. Collect and assess planning efforts of this type that have been performed by various agencies and organizations on selected sites within the watershed. 3. Perform an analysis of existing monitoring information to assess the status of various waterbodies and river reaches in the watershed and determine sources of pollution and degradation. 4. Identify and describe candidate conservation and restoration projects (structural and non-structural) and link them to current issues and likely outcomes through field reconnaissance, meetings with watershed stakeholders, Geographic Information System (GIS) inventory and analysis (e.g., riparian conditions, land cover, geomorphic processes, etc.), and scientific assessment. 5. Prioritize restoration strategies in a decision matrix based on potential benefits, likelihood of success, rough estimates of costs, and stakeholder input. 6. Produce a report describing the results of watershed inventory and prioritized recommendations for restoration projects and strategies. With a drainage area of nearly 1,000 square miles, the Eagle River watershed encompasses a complex array of natural processes, human influences, and candidate restoration activities. Time, as well as financial constraints, inevitably limit the ecological, hydrologic, and geomorphic assessment of large river basins. The Eagle River Inventory and Assessment is no exception in that these constraints necessitated a restricted focus on the predominant stressors in the watershed, maintaining balance between collection of new information and adequate analysis of the large body of existing information relevant to the project. The approach adopted for this study primarily relied on the targeted utilization of numerous existing data sets, rapid synoptic surveys of riparian and instream conditions, interpretation of aerial photography, GIS analyses, historical information, local knowledge, and expert judgment. Fortunately, a wide variety of water quality, hydrologic, and other types of data have been collected in the basin, albeit often for disparate purposes and using variable protocols. Many of the existing data sets collected have been examined in the context of individual projects or agency goals related to some specific aspect of water quality or management, as opposed to basin-scale assessment, management, and restoration of ecological integrity. Nonetheless, the large body of existing data coupled with field reconnaissance provided a sufficient basis to identify general patterns and trends in system characteristics, key stressors, and potential benefits of various management and restoration activities. Although some questions were answered during this effort, numerous questions remain and many new questions arose. Ultimately, the results of the Eagle River Inventory and Assessment point to the necessity of an ongoing adaptive management effort in the region. Adaptive watershed management may be described simply as a process of: 1. setting goals, 2. taking actions based on the best available information,
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