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Avoiding and Minimizing Impacts to Aquatic Resources through Construction Design Standards
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2025-05-01
[PDF-4.68 MB]
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Edition:Final Report 8/16/24–5/15/25
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Abstract:The primary objective was to summarize best management practices that avoid and minimize impacts on aquatic resources through construction design standards. The study involved a literature review and discussions with experts to identify knowledge gaps regarding the effects of road and bridge construction on aquatic resources. We examined how other states responded to similar challenges and the standard specifications they used. These recommendations were based on findings from different states and best practices accepted by regulatory agencies. The research reviewed each state’s processes and guidelines for stream-road crossings, focusing on culvert and bridge designs that affect aquatic resources. We identified that impacts on aquatic resources were commonly framed from the context of aquatic organism passage. Our report emphasizes the importance of bridges and culvert design specifics for maintaining ecological connectivity and the long-term health of aquatic ecosystems while also considering road crossings’ structural integrity and safety. Information on the design specifics of culverts and bridges is described within our report. We provided a foundation for future studies and improvements to construction standards, aiming to reduce adverse effects on aquatic resources while meeting public safety and use demands.
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