Question: Where in Jacksonville is the company that was established in 1978 located?

Context paragraphs:
Jacksonville Gem and Mineral Society: The Jacksonville Gem and Mineral Society http://www.jaxgemandmineral.org was established in 1959.  It is located in Jacksonville Florida.  It is now a 501 c3 IRS recognized non-profit.  The Society was originally established by a small group of people interested in the study of Rocks, and Mineralogy, and well as the art of Lapidaryskills.  This small group of approximately 5 members has now grown to over 155 members not including other family members such as husbands, wives and children.  Members of the society have the common goal of wanting to stimulate interest in rocks, minerals in the field of Earth science; as well as to help disseminate knowledge, methods and procedures for the collection, identification, classification, cutting, polishing, setting, and mounting of specimens.

JEA: JEA (Jacksonville Electric Authority), located in Jacksonville, Florida, is the eighth largest community-owned electric utility company in the United States and largest in Florida.  As of 2009, JEA serves more than 417,000 electric customers, 305,000 water customers and 230,000 sewer customers.  Besides Jacksonville (Duval County), JEA also has customers in Clay, Nassau and St. Johns counties.

CSX Corporation: The CSX Corporation is an American holding company focused on real estate and railways in North America, among other industries.  The company was established in 1978 as part of the Chessie System and Seaboard Coast Line Industries merger.  The Chessie System and Seaboard Coast Line Industries which includes all railroads of both companies became subsidiaries of the CSX Corporation and both companies were merged into the CSX Corporation in 1980, the third year that the CSX Corporation was in operation.

North Florida Shipyards, Inc.: North Florida Shipyards is a ship repair and conversion company, which has been operating since 1978.  Company is situated in Jacksonville, Florida and included two facilities, which are located in Jacksonville and Mayport Naval Station.

Buckman and Ulmer Building: The Buckman and Ulmer Building was a historic building in Jacksonville, Florida.  It was built in 1925 by Jacksonville architects Marsh & Saxelbye for the Buckman and Ulmer Real Estate Company.  It was located at 29-33 West Monroe Street.  On December 30, 1992, it was added to the U.S. National Register of Historic Places.  It was later demolished to construct the current Jacksonville Main Library.

CSX Transportation Building: The CSX Transportation Building is a 251 ft high-rise office building located in Jacksonville, Florida.  Completed in 1960, the building currently serves as headquarters for CSX Corporation.  The building is located in the Northbank area of Downtown Jacksonville, along the banks of the St. Johns River.  Its former names include Atlantic Coast Line Building and Seaboard Coastline Railroad Building.  Designed by KBJ Architects, the CSX Transportation Building is a LEED certified building and is an iconic example of Mid-century modern and International style architecture.

111th Aviation Regiment (United States): Organized in the Florida Army National Guard as Company D, 26th Aviation Battalion and federally recognized 1 September 1978 at Jacksonville.  Expanded, reorganized and redesignated 2 October 1986 as the 419th Aviation Battalion.  Redesignated 1 October 1987 as the 111th Aviation, a parent regiment under the United States Army Regimental System to consist of the 1st Battalion at Jacksonville.

American Beach, Florida: American Beach is a historic beach community popular with African-American vacationers.  It is located north of Jacksonville on Amelia Island in Nassau County.  During the time of segregation and the Jim Crow era, African Americans were not allowed to swim at most beaches in Jacksonville, and several black-only areas were created.  American Beach was the largest and most popular, and was a community established by Abraham Lincoln Lewis, Florida's first black millionaire and president of the Afro-American Life Insurance Company.  It contains American Beach Historic District, a historic district which was listed on the National Register of Historic Places in 2002.

Jacksonville Landing: The Jacksonville Landing is a festival marketplace in Downtown Jacksonville, Florida.  It is located at the intersection of Independent Drive and Laura Street, along the Jacksonville Riverwalk.  It was built by the Rouse Company at a cost of $37.5 million and opened in 1987.  The 126,000 sqft center is comparable to New York City's South Street Seaport, Boston's Faneuil Hall and Miami's Bayside Marketplace, all developed by Rouse.

Jacksonville Water Taxi: The Jacksonville Water Taxi, or Jacksonville River Taxi, is a water taxi service in Jacksonville, Florida.  Established in 1987, it ferries passengers across the St. Johns River between the Northbank and Southbank of Downtown Jacksonville.  Stops are located along the Riverwalks.

Supporting paragraphs: CSX Transportation Building CSX Corporation
Answer: along the banks of the St. Johns River