Question: When was the county founded where the Port of Detroit located?

Context paragraphs:
Macomb Township, Michigan: Macomb Township is a general law township and northern suburb of Detroit located in Macomb County in the U.S. state of Michigan, in the Metropolitan Detroit region.  The township's population was 50,477 at the 2000 census.  The 2010 Census places the township's population at 79,580, making it Michigan's fastest growing major municipality.

Rockcastle County, Kentucky: Rockcastle County is a county located in the U.S. state of Kentucky.  As of the 2010 census, the population was 17,056.  Its county seat is Mt. Vernon.  The county founded in 1810 and named for the Rockcastle River which runs through it.  The river, in turn, is named for its majestic rock cliffs.

Eagle Mountain, California: Eagle Mountain, California, is a modern-day ghost town in the California desert in Riverside County founded in 1948 by noted industrialist Henry J. Kaiser.  The town is located at the entrance of the now-defunct Eagle Mountain iron mine, once owned by the Southern Pacific Railroad, then Kaiser Steel, and located on the southeastern corner of Joshua Tree National Park.  The town's fully integrated medical care system, similar to other Kaiser operations in California, was the genesis of the modern-day Kaiser Permanente health maintenance organization.  Eagle Mountain is accessible by Riverside County Route R2, twelve miles (19 km) north of Desert Center, midway between Indio and the California/Arizona state line along Interstate 10.  The town's relative youth and brief time of abandonment make Eagle Mountain among the country's best preserved ghost towns.

Grosse Pointe Farms, Michigan: Grosse Pointe Farms is a suburban town bordering Detroit located in Wayne County in the U.S. state of Michigan.  The population was 9,479 at the 2010 census.  It is bordered by Canada and Lake Saint Clair on the south and east, Grosse Pointe on the west, Detroit on the north, and Grosse Pointe Woods and Grosse Pointe Shores on the northeast.  Lakeshore Drive begins in Grosse Pointe Farms, where, just east of Fisher Road, the eastbound driver or pedestrian on Jefferson Avenue descends to lake level, following the curvature of the lakefront to the northeast.

Brighton, Michigan: Brighton is a suburb in metro Detroit located in the southeast portion of Livingston County in the U.S. state of Michigan.  As of the 2010 census, the city population was 7,444.  Brighton forms part of the South Lyon-Howell-Brighton Urban Area.  It is one of two incorporated cities in Livingston County, and incorporates land that was once part of Brighton, Green Oak and Genoa townships.

Chaldean Town: Chaldean Town is an historic Chaldean neighborhood in Detroit located along West Seven Mile Road in a segment in between Woodward Avenue to the west and John R St. to the east.  The population of the district are mainly low income elderly people and recent immigrants, who are mostly made up of Chaldeans.  The neighborhood is usually just a stop point for newly arrived immigrants, who then typically prefer to move to the suburbs of Detroit once they gain financial well-being.

Port of Detroit: The Port of Detroit is located along the west side of the Detroit River, and is the largest seaport in the state of Michigan.  The port is overseen by the Detroit/Wayne County Port Authority, a five-member board of directors appointed by the State of Michigan, Wayne County, and the City of Detroit.  The authority coordinates river commerce on the waters and shoreline of Wayne County.  The port consists of multiple marine terminals handling general, liquid, and bulk cargo as well as passengers.  The Port of Detroit's single most valuable commodity is steel, and the largest commodity handled by tonnage is ore.  Other important commodities handled at the port include stone, coal and cement.

Berkley, Michigan: Berkley is a suburb of Detroit located along the Woodward Corridor in southeastern Oakland County, Michigan.  As of the 2010 census, the total population was 14,970.

Wayne County, Michigan: Wayne County is the most populous county in the U.S. state of Michigan.  As of the 2016 census, its population was 1,749,366 making it the 19th-most populous county in the United States.  The 2014 Census update listed the county's population at 2,264,804.  The county seat is Detroit, the most populous city in Michigan and 18th-most populous city in the United States.  The county was founded in 1796 and organized in 1815.

Detroit Cristo Rey High School: Detroit Cristo Rey High School (DCRHS) is a private, Roman Catholic high school in Detroit, Michigan.  The school opened in August, 2008 with an initial freshman class of about 100 students, and operates within the Roman Catholic Archdiocese of Detroit.  It is a co-educational Catholic high school in the city of Detroit located in the West Vernor-Junction Historic District.

Supporting paragraphs: Port of Detroit Wayne County, Michigan
Answer: 1796