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Alternative Title:Fish Passage Engineering Project
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Edition:Final Report
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Abstract:Caltrans Division of Research Innovation and System Information (DRISI) initiated the Fish Passage Engineering Project with the objective of evaluating the implementation of recent fish passage road crossings. Crossings that span the bankfull channel width, referred to as full span crossings, were of primary interest given their recognized benefits of maintaining geomorphic continuity, providing passage for aquatic and terrestrial species other than fish, lower maintenance costs and resilience to extreme events. Seventeen sites consisting of both full and partial span crossings were identified by Caltrans and regulatory agency (California Department of Fish and Wildlife, National Marine Fisheries Services) personnel serving on the project advisory board for inclusion in the study. This report describes the methods used to assess the study sites current performance and presents the findings from the site assessments and detailed site surveys. These findings are synthesized to identify project elements that have worked well for all sites and causes and lessons learned from elements that have underperformed. Detailed site assessments and observations are provided in Appendix A, and completed Caltrans Expert Fish Passage Site Assessment forms for each study site are included in Appendix B.
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