Regulatory Compliance

NEPA (National Environmental Policy Act) Compliance

Trileaf is a preeminent firm in NEPA permitting, having conducted over 90,000 NEPA reports across all 50 states and 2 US territories.

NEPA Report requirements are complex and frequently vary between states and/or federal agencies. As soon as we receive your site, our standard procedure is to complete the required site visit and dispatch agency letters within 15 business days.

We will perform proactive research on the endangered species, Native American tribes, wetlands, flood plains, wilderness areas, wildlife preserves, archeological, and historical architectural issues in relation to your site. This exhaustive process allows Trileaf to provide you with site viability information prior to receiving responses from applicable agencies.


NEPA Reports Completed



“Tell the team how amazing they are. Trileaf is one of a very small handful of companies that gets documentation to us in a timely manner and everything is in packets in a very easy to follow manner. I can’t speak highly enough of Trileaf!”

Bridget Leader Seminole Nation of Oklahoma

“Trileaf represents true expertise in the NEPA field and we are lucky to have support from Pyramid and Trileaf on our projects. We’re excited to work with you all.”

Kirk Scouten Pyramid

“Thanks you for the lesson on NEPA, Phase I’s ect. It was great information and it’s good to have the latest and most recent requirement for the field.”

Beth Smartlink

“Thank you for taking the time out of your busy schedule to come to us and give us a refresher course in the Environmental world of our industry. It was very informative & will definitely assist me in the field.”

Amy H. Smartlink

“You are phenomenal, many thanks for your time and effort in collecting this information.”

Nicole Larsen Crown Castle

Cultural Resource Management

Mandated in the National Historic Preservation Act (NHPA) of 1966, the Section 106 Review process is required for projects utilizing state or federal funding or needing state or federal permitting. If this is your project, Trileaf can provide services to fulfill the research, field work, tribal consultation, and State Historic Preservation Office (SHPO) consultation conditions of the Section 106 Review. In an effort to streamline this process, we employ full-time, permanent archaeologists and architectural historians who are qualified with the Department of the Interior (DOI). Our personnel are capable of conducting all necessary assessments and reviews.

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NEPA Exclusion Reviews

Not all projects are required to undergo a full NEPA checklist analysis. Many projects fall within the categorical exemptions (Cat-Ex) that clear certain and sometimes all criteria from review. An example specific to telecommunications work, new wireless sites and modification to existing sites may be excluded from certain or all aspects of NEPA review by one or more Nationwide Programmatic Agreements (NPAs) implemented by the Federal Communications Commission (FCC). 

Trileaf has conducted screenings on over 30,000 sites nationwide, including groupings of up to 1000 sites at a time. Our regulatory experts are ready to screen your projects, saving you time and money by guaranteeing the correct scope of regulatory compliance.

Wildlife: Threatened and Endangered Species

Trileaf employs biologists who are highly respected within the industry to visit and document the habitat of your site. After their visit, they will screen your proposed project for anticipated impacts to threatened and/or endangered species. If warranted or requested, Trileaf will consult with the respective state and/or federal regulatory agencies to confirm the opinions of our personnel.

In addition to performing this NEPA-related screening, Trileaf can provide services to assist you in decreasing or eliminating the potential impacts if adverse effects to rare or protected wildlife are anticipated. We are able to offer informed project-altering suggestions to mitigate species impact, or if impacts are unavoidable, we can partner with the regulatory agencies to obtain the necessary permits for your project.

Related services

Cultural Resources Management

Trileaf’s cultural resources team consists of experienced professionals who meet or exceed the Secretary of the Interior’s (SOI) Historic Preservation Qualification Standards

Phase I & II Environmental Site Assessments

Under the EPA’s All Appropriate Inquiries rule, a Phase I Environmental Site Assessment (Phase I ESA) is the gold standard. Per the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), purchasing or even leasing real estate may subject a buyer/lessor to environmental liability at a site.

Migratory Bird Evaluations

We combine rigorous science with targeted, cost-effective techniques to reinforce our reputation as a leading national vendor for Migratory Bird Evaluations (MBE).

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