  Large particle physics projects funded by the U.S. Government require an
evaluation and mitigation of each project's potential impacts on the local
communities. However, beyond meeting governmental requirements, particle
physics projects stand to play an essential role in local decision-making,
building relationships, and framing discussions about key projects by becoming
meaningfully engaged in their local communities. In this white paper for the
U.S. Particle Physics Community Planning Exercise (Snowmass), we examine
several local community engagement efforts made by three facilities: Lawrence
Berkeley National Laboratory (Berkeley Lab), Fermi National Accelerator
Laboratory (Fermilab), and the Sanford Underground Research Facility (SURF).
Although each facility focuses on a different endeavor in varying types of
communities, each study highlights the importance and benefits of employing
consistent outreach techniques, promoting diversity, establishing lasting
relationships, and creating environments for open and honest communication.
