Linear infrastructure projects can trigger environmental and cultural resource reviews through federal funding, federal permit requirements, or both. Projects receiving federal funding must comply with statutes such as the National Environmental Policy Act (NEPA), National Historic Preservation Act (NHPA), Clean Water Act (CWA), and Endangered Species Act (ESA), which are designed to evaluate and address potential impacts to natural resources, waterways, and cultural or historic properties.
Even in the absence of federal funding, federal permits, such as a Clean Water Act Section 404 permit from the U.S. Army Corps of Engineers (USACE), can independently trigger NEPA review, NHPA Section 106 consultation, and ESA Section 7 consultation. At the same time, projects are subject to a layered framework of state and local requirements, including zoning, floodplain development regulations, building codes, and state-level environmental protection standards. Many states also require reviews for impacts to state-listed species, wetlands, and other sensitive resources regardless of federal involvement.
Trihydro supports linear infrastructure projects through impact analysis and preparation of Environmental Assessments (EAs), special-status species surveys, biological assessments, wetland delineations, and other technical studies needed to support regulatory compliance. We also assist with CWA Sections 404 and 401 permitting, including coordination with the USACE to obtain coverage under applicable Nationwide Permits. By integrating permitting and compliance considerations early in project design, we help project teams reduce risk, limit schedule disruptions, and move projects forward in alignment with environmental and cultural stewardship goals.