Sombra, Ontario

The Sombra – Marine City (Bluewater) Ferry was a ferry service that crossed the St. Clair River, connecting Sombra, Ontario in Canada on the eastern bank with Marine City, Michigan in the United States on the western bank. Vehicles accessed the ferry from Lambton County Road 33/St. Clair Parkway (a former alignment of Highway 40) in Sombra or from Highway M-29 in Marine City. In Sombra on the Ontario/Canadian side, the dock was on King Street. On the Michigan/American side, the dock was on South Water Street. In July, 2013 the ferry was charging a toll of $7.00 (CAN or US) for an automobile. The first departure from Sombra was 6:40 AM, and from Marine City was 7:00 AM.

The Ward-Holland House is a private house located at 433 North Main Street in Marine City, Michigan. It was listed on the National Register of Historic Places in 1972.

The Marine City Water Works is a public works building located at 229 South Main Street in Marine City, Michigan. It was listed on the National Register of Historic Places in 2011.

The Marine City City Hall is a former government building located at 300 Broadway Street in Marine City, Michigan. It was listed on the National Register of Historic Places in 1982. City government offices moved out of the building in 2005.

Cardinal Mooney Catholic High School is a private, Catholic high school in Marine City, Michigan. It is located in the Roman Catholic Archdiocese of Detroit.

Marine City is a city in St. Clair County in the U.S. state of Michigan. Located on the west bank of the St. Clair River, it is one of the cities in the River District north of Detroit and south of Lake Huron. In the late 19th century, it was a major center of wooden shipbuilding and lumber processing. The population was 4,079 at the 2020 census. The city formerly featured an international auto ferry service, The Bluewater Ferry to Sombra, Ontario, Canada across the river.

The Belle River is a 73.5-mile-long (118.3 km) river in the U.S. state of Michigan, flowing into the St. Clair River in Marine City at 42°42′25″N 82°29′50″W. The North Branch Belle River rises out of Long Lake at 43°00′50″N 83°08′41″W in section 22 of Attica Township in southeast Lapeer County. Long Lake is fed by the Long Lake Drain, which drains marshy areas to the south of the lake. From Long Lake, the river flows eastward around the north side of Imlay City. It is fed by the Hunt, Pennell, and Clark Corner drains on the northeast of Imlay City and turns southward, where it joins the main branch of the river at 42°59′31″N 83°03′57″W, now near the intersection of Interstate 69 and M-53. The main branch of the Belle River rises in the south of Dryden Township at 42°53′54″N 83°07′50″W, in a marshy area near the boundary between Lapeer and Oakland counties. It flows mostly north and east until joined by the north branch, after which it flows mostly south and east into St. Clair County. It passes the north side of Memphis, then turns southeast and passes through the northeast corner of Macomb County. Interstate 94 crosses the river in the northeast corner of Casco Township. The river continues east by southeast through China Township and into East China Township, where it turns south less than a half mile from the St. Clair River and parallels the St. Clair for a few miles before its mouth in downtown Marine City. The river's watershed drains portions of Lapeer, Macomb, Oakland, and St. Clair counties.

Fawn Island is a small Canadian island located in the St. Clair River between Sombra, Ontario and Marine City, Michigan. The island is approximately 50 miles (80 km) northeast of Detroit, Michigan and Windsor, Ontario. There are over 50 cottages on the island, all accessible via the island's two canals. The canals divide the island into three islets, joined by two small bridges.

WHLX (1590 AM) was an Americana radio station licensed to Marine City, Michigan, with a power output of 1,000 watts day and 102 watts at night. The station was owned by Radio First and broadcast from studios on Huron Avenue in Downtown Port Huron. Its programming was simulcast on FM translator W224DT, licensed to Port Huron at 92.7 MHz, with an effective radiated power of 125 watts. The station branded itself as Country, Rock, and Folk 92.7 WHLX The Hills. WHLX ceased broadcasting on 1590 AM and 92.7 FM on April 6, 2026, with the Americana format moving to a reinvented WPHM. The license was cancelled on April 13.

The Saint Clair Power Plant was a major coal- and oil-fired power plant owned by DTE Electric, a subsidiary of DTE Energy. It was located in St. Clair County, Michigan, on the west bank of St. Clair River. The plant was across M-29 from the newer Belle River Power Plant in East China, Michigan. The first four units of St. Clair were built in 1953–1954. Since then, three more generating units were added to the plant. The St. Clair Power Plant generated 1982 megawatts in total. It was Detroit Edison's second largest power producer. The power plant has a large impact on the local economy, employing about 300 workers. The plant shut down in May 2022.

Greenfield Energy Centre is a natural gas-fired power station located in Courtright, Ontario. It produces 1,005 MW of electricity and is the second largest natural gas-fired power plant in Canada. It is the largest privately owned and operated gas power plant in Ontario. Greenfield consists of three Siemens Westinghouse gas turbine generators, a single 517 MW Toshiba steam turbine generator, and three Deltek heat recovery steam generators.