Gradolph Field Airport: Aeronautical information includes location, runway, taxiways, navaids, radio frequencies, FBO information, weather, sunrise and sunset times, aerial photo, airport diagram.
Ingenium Engineering Services: Science consultant and expert witness. Provides consulting for accident investigation and reconstruction, and litigation support for mechanical and forensic engineering.
Petersburg Local News: Topix.net: Local, regional, and statewide news collected from diverse sources on the web.
Petersburg, Michigan: History of the community.
The Auto Express: Sells repairable automobiles with clean or salvaged titles. All vehicles sold meet state inspection guidelines. Small selection of automobile parts.
Totem Pole Park: An affordable family campground. Camping, fishing, and recreational activities.