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Services We Provide:

The National Environmental Policy Act (NEPA) requires federal agencies to consider the environmental impacts from their actions and to prepare detailed assessments of environmental impacts and alternatives to their actions. Perennial has extensive experience working with federal agencies to prepare detailed Environmental Assessments (EA) and Environmental Impact Statements (EIS) in compliance with NEPA for project-specific impacts on environmental resources and the development of alternative analyses.
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Perennial’s experience with wetland and waterbody delineations ranges from small developments to large transportation and utility projects. Delineations are performed by our team of experienced biologists through an evaluation of vegetation, soils, and hydrology according to the methodology prescribed by the U.S. Army Corps of Engineers (USACE) and/or state environmental agencies. Through use of sub-meter GPS units, we collect data along wetland and waterbody boundaries during field surveys, allowing us to efficiently produce accurate mapping and impact calculations.
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The Perennial Environmental team functions as a trusted advisor in matters of threatened and endangered (T&E) species habitat assessments and surveys for federally- and state-listed species, including protected species of concern. We aid in informal and formal consultations with the applicable regional U.S. Fish and Wildlife Service (USFWS) and/or regional National Marine Fisheries Service (NMFS) offices, and state agencies for impacts to federal- and state-listed species, including the development of mitigation plans.
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Perennial’s cultural resources management team includes Principal Investigators who meet the Secretary of Interior Standards, Project Archaeologists, as well as field and technical staff with regional and local archaeological expertise to comply with federal and state standards. Our team specializes in providing expert technical assistance to ensure compliance with Section 106 of the National Historic Preservation Act (NHPA), as well as state and local Antiquities codes and guidelines in support of large and small-scale projects.

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Perennial promotes environmental compliance and stewardship through lifelong project and facility oversight. Our inspection services verify conformance from initial planning and construction through ongoing operations. Experienced teams customize monitoring strategies to efficiently facilitate timelines, budgets, and quality standards simultaneously. With immersive training, restoration programs, and recurring audits reinforcing sustainable best practices, we offer guidance tailored to each phase. Perennial’s systematic solutions ensure regulatory and policy adherence over the entire asset lifecycle.
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Perennial employs the latest spatial analysis software for drafting, analysis, and visualization. Using state-of-the-art Trimble Geo 7X handheld technology, our biologists and cultural resource specialists provide sub-meter mapping accuracy with reliable data. By combining years of experience with a wide variety of geospatial technologies, we can provide actionable solutions to your project’s environmental challenges and more by delivering sub-meter mapping accuracy with reliable data.

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Perennial conducts Phase I Environmental Site Assessments (ESAs) and due diligence evaluations to help sellers and buyers ensure that their new property acquisitions or divestitures are audited for liabilities associated with current and historical land use and activities. Perennial provides a thorough appraisal of historic and current potential environmental conditions, offering our clients protection from unknown hazardous waste or chemical sources on their properties.
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Uncontrolled algae and plant growth create costly issues for freshwater bodies—fish kills, odors, decreased aesthetics, and recreation value. Perennial provides comprehensive consulting and management services to mitigate aquatic vegetation proactively. Our science-based treatments promote ecological balance in lakes/ponds for HOAs, MUDs, communities, government, businesses, developers, land owners, golf courses, and more. Outcomes include optimizing aesthetics, function, and property value.

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