Question: Moulton Junction is the location where Norfolk Southern and what other Class I railroad met?

Context paragraphs:
Thoroughbred Shortline Program: The Thoroughbred Shortline Program was a system of shortline creation devised by Norfolk Southern in the late 1980s.  It involved an alternative to the typical practice of a Class I railroad selling rail lines outright to shortlines in the post-Staggers Act era.  Defining features of the program included leasing lines to shortline operators as opposed to outright sales, keeping stations available in Norfolk Southern marketing campaigns, and crediting carloads delivered to Norfolk Southern towards the lease and eventual purchase of the line.  The program ran from 1988 to 1991, creating more than a dozen new shortline railroads, nearly all of which are still in operation today.

Sunbury Line: The Sunbury Line (formerly known as Sunbury Subdivision) is a rail line that is owned and operated by Norfolk Southern Railway which in turn is owned by the Norfolk Southern Corporation.  The line travels from Sunbury, Pennsylvania to Binghamton, New York, connecting with Norfolk Southern's Southern Tier Line at Binghamton and Norfolk Southern's Buffalo Line at Sunbury.

Carolina and Northwestern Railway: The Carolina & Northwestern Railway (Ca&NW) was a railroad that served South Carolina and North Carolina from 1897 until January 1, 1974.  The original line was operated by the Ca&NW as a separate railroad controlled by the Southern Railway until 1974 when the name was changed to the Norfolk Southern Railway.  On June 1, 1982, Southern Railway and Norfolk and Western Railroad merged to form Norfolk Southern Railway.  Choosing to use the name 'Norfolk Southern Railway' for the merger, in 1981, the original Ca&NW line along with original Norfolk Southern Railway was renamed Carolina and Northwestern once again.  In the early 1950s several shortline subsidiaries of the Southern Railway were leased to the Ca&NW for operation, with these lines remaining a part of the Ca&NW into the 1980s.

F. Blair Wimbush: Frederick Blair Wimbush (born July 24, 1955), is a retired American railroad executive and lawyer.  He continues to be a civic and professional leader.  From 1980 to 2004, Wimbush progressed through positions of increasing responsibility in the Norfolk and Western Railway Company and Norfolk Southern Corporation Law Departments, including Senior General Counsel in 2002.  In June 2004, he was elected Vice President, Real Estate of Norfolk Southern Corporation, parent company of Norfolk Southern Railway Company.  In November 2007, he became the first, and as of August 11, 2012 the only, executive level Corporate Sustainability Officer in the railroad industry, in addition to his real estate position.  He managed several large conservation and energy efficiency projects for the company and has spoken on corporate sustainability at several corporate and educational conferences.  He retired from Norfolk Southern Corporation after 35 years of service on May 1, 2015.  Wimbush has served on the boards of the Hampton Roads Association of Commercial Real Estate, Hampton Roads Economic Development Alliance, and the Monarch Bank Norfolk City Board.  On April 4, 2015, Virginia Governor Terry McAuliffe announced that Wimbush had been appointed to the Virginia Port Authority board.  On June 24, 2016, Governor McAuliffe reappointed Wimbush to a full five-year term ending June 30, 2021.

Pennsylvania Lines LLC: Pennsylvania Lines LLC was a limited liability company that owned railroad lines in the United States that are owned and operated by the Norfolk Southern Railway.  The company was formed in 1998 to own Conrail lines assigned to Norfolk Southern in the split of Conrail between Norfolk Southern and CSX Transportation; operations were switched over on June 1, 1999.  The company is named after the old Pennsylvania Railroad, whose old main line was a line of the new company.  In November, 2003, the Surface Transportation Board approved a plan allowing Norfolk Southern to fully absorb Pennsylvania Lines LLC, which was done on August 27, 2004.

Moulton Junction, Iowa: Moulton Junction was a railroad junction in Appanoose County, Iowa where two railroads, Norfolk Southern Railway and the Chicago, Rock Island and Pacific Railroad (Rock Island), formerly met.

Enola Branch: The Enola Branch is a railroad segment of the Port Road Branch and it was a rail line; the Enola Branch railroad segment and the rest of the Port Road Branch is owned and operated by the Norfolk Southern Railway in the U.S. state of Pennsylvania.  The railroad segment runs from Washington Boro northwest to Marysville and it is a former Pennsylvania Railroad rail line.  Its south end is at a former junction with the Atglen and Susquehanna Branch, where the main segment of the Port Road Branch continues southeast.  Its north end is at the Pittsburgh Line.  Along the way, it meets the York Secondary at Wago Junction (near York Haven) and goes under the Lurgan Branch at Lemoyne.  Norfolk Southern labels the Enola Branch as part of the Port Road Branch, officially ending the Enola Branch's existence as a rail line, the main segment of the Port Road Branch runs from Marysville, Pennsylvania south to Perryville, Maryland.  The line goes through the Enola Yard.

Delmarva Central Railroad: The Delmarva Central Railroad (reporting mark DCR) is an American short-line railroad owned by Carload Express that operates 161.59 mi of track on the Delmarva Peninsula in the states of Delaware and Maryland.  The railroad operates lines from Porter, Delaware to Pocomoke City, Maryland and from Harrington, Delaware to Frankford, Delaware along with several smaller branches.  The DCR interchanges with the Norfolk Southern Railway, the Maryland and Delaware Railroad, the Bay Coast Railroad, and the Delaware Coast Line Railroad.  The railroad was created in 2016 to take over the Norfolk Southern Railway lines on the Delmarva Peninsula.

Chicago, Rock Island and Pacific Railroad: The Chicago, Rock Island and Pacific Railroad (CRI&P RW, sometimes called "Chicago, Rock Island and Pacific Railway") (reporting marks CRIP, RI, ROCK) was a Class I railroad in the United States.  It was also known as the Rock Island Line, or, in its final years, The Rock.

Norfolk Southern Lake Pontchartrain Bridge: The Norfolk Southern Lake Pontchartrain Bridge is a bridge that carries a single-track of Norfolk Southern rail line between Slidell and New Orleans, Louisiana.  At 5.8 mi long, it is the longest railroad bridge in the United States and likely the longest rail bridge over water in the world.  The Huey P. Long Bridge in nearby Jefferson Parish has sometimes been given that title, but at about 4.4 mi , that bridge is considerably shorter than the Norfolk Southern bridge.

Supporting paragraphs: Moulton Junction, Iowa Chicago, Rock Island and Pacific Railroad
Answer: Chicago, Rock Island and Pacific Railroad