State of Michigan, 1410 Elmwood St, Ste 3, Port Huron, MI 48060, US

According to the website:Located in Port Huron Twp, MI, the USPS is responsible for the delivery of mail and other forms of communication throughout the United States. It is one of the few government agencies explicitly authorized by the United States Constitution. It plays a vital role in the country's infrastructure and communications network, assuring the safe and efficient delivery of letters and packages, providing customers with postal products and services, and supporting economic development in communities throughout the United States.

Blue Water Bridge MDOT

Transportation Department

State of Michigan Transportation Department

United States Government