Interchange Series

The Interchange series contains articles about railroads that interchanged with the Pennsy, including fleet statistics and paint schemes with era-appropriateness guidance. A few noteworthy or pertinent freelance model railroads are included.

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260px Gulf logo.svgGulf Oil was a major global oil company from the 1900s to the 1980s. The eighth-largest American manufacturing company in 1941 and the ninth-largest in 1979, Gulf Oil was one of the so-called Seven Sisters oil companies. Prior to its merger with Standard Oil of California, Gulf was one of the chief instruments of the Mellon family fortune; both Gulf and Mellon Financial had their headquarters in Pittsburgh.Gulf Oil was a major global oil company from the 1900s to the 1980s. The eighth-largest American manufacturing company in 1941 and the ninth-largest in 1979, Gulf Oil was one of the so-called Seven Sisters oil companies. Prior to its merger with Standard Oil of California, Gulf was one of the chief instruments of the Mellon family fortune; both Gulf and Mellon Financial had their headquarters in Pittsburgh.

Gulf's former headquarters, originally referred to as "the Gulf Building" (now the Gulf Tower office condos), is an Art Deco skyscraper. The tallest building in Pittsburgh until 1970, when it was eclipsed by the U.S. Steel Tower, it is capped by a step pyramid structure several stories high. Until the late 1970s, the entire top was illuminated, changing color with changes in barometric pressure to provide a weather indicator that could be seen for many miles.

Gulf Oil Corporation (GOC) ceased to exist as an independent company in 1985, when it merged with Standard Oil of California (SOCAL), with both re-branding as Chevron in the United States. 

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deeprocklogoDeep Rock Oil and Gas (reporting mark DRX).

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400px Sinclair Oil logo.svgSinclair Oil Corporation is an American petroleum corporation, founded by Harry F. Sinclair on May 1, 1916, as the Sinclair Oil and Refining Corporation by combining the assets of 11 small petroleum companies. Originally a New York corporation, Sinclair Oil reincorporated in Wyoming in 1976. The corporation's logo features the silhouette of a large green dinosaur. It is ranked on the list of US largest privately owned corporations. It owns and operates refineries, gas stations, hotels, a ski resort and a cattle ranch.

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Logo of the Denver and Rio Grande Western Railroad.pngThe Denver & Rio Grande Western Railroad (reporting mark DRGW), often shortened to Rio Grande, D&RG or D&RGW, formerly the Denver & Rio Grande Railroad, was an American Class I railroad company. The railroad started as a 3 ft (914 mm) narrow-gauge line running south from Denver, Colorado in 1870. It served mainly as a transcontinental bridge line between Denver, and Salt Lake City, Utah. The Rio Grande was also a major origin of coal and mineral traffic.The Denver & Rio Grande Western Railroad (reporting mark DRGW), often shortened to Rio Grande, D&RG or D&RGW, formerly the Denver & Rio Grande Railroad, was an American Class I railroad company. The railroad started as a 3 ft (914 mm) narrow-gauge line running south from Denver, Colorado in 1870. It served mainly as a transcontinental bridge line between Denver, and Salt Lake City, Utah. The Rio Grande was also a major origin of coal and mineral traffic.

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LN logoThe Louisville and Nashville Railroad (reporting mark LN), commonly called the L&N, was a Class I railroad that operated freight and passenger services in the southeast United States.The Louisville and Nashville Railroad (reporting mark LN), commonly called the L&N, was a Class I railroad that operated freight and passenger services in the southeast United States.

Chartered by the Commonwealth of Kentucky in 1850, the road grew into one of the great success stories of American business. Operating under one name continuously for 132 years, it survived civil war and economic depression and several waves of social and technological change. Under Milton H. Smith, president of the company for thirty years, the L&N grew from a road with less than three hundred miles (480 km) of track to a 6,000-mile (9,700 km) system serving thirteen states. As one of the premier Southern railroads, the L&N extended its reach far beyond its namesake cities, stretching to St. Louis, Memphis, Atlanta, and New Orleans. The railroad was economically strong throughout its lifetime, operating both freight and passenger trains in a manner that earned it the nickname, "The Old Reliable."

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Chicago Rock Island and Pacific Railroad logoThe 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.

Dates of operation: October 10, 1852–March 31, 1980

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Illinois Central Diamond HeraldThe Illinois Central Railroad (reporting mark IC), sometimes called the Main Line of Mid-America, was a railroad in the central United States, with its primary routes connecting Chicago, Illinois, with New Orleans, Louisiana, and Mobile, Alabama. A line also connected Chicago with Sioux City, Iowa (1870). There was a significant branch to Omaha, Nebraska (1899), west of Fort Dodge, Iowa, and another branch reaching Sioux Falls, South Dakota (1877), starting from Cherokee, Iowa. The Sioux Falls branch has been abandoned in its entirety.The Illinois Central Railroad (reporting mark IC), sometimes called the Main Line of Mid-America, was a railroad in the central United States, with its primary routes connecting Chicago, Illinois, with New Orleans, Louisiana, and Mobile, Alabama. A line also connected Chicago with Sioux City, Iowa (1870). There was a significant branch to Omaha, Nebraska (1899), west of Fort Dodge, Iowa, and another branch reaching Sioux Falls, South Dakota (1877), starting from Cherokee, Iowa. The Sioux Falls branch has been abandoned in its entirety.

The Canadian National Railway acquired control of the IC in 1998.

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St. Louis and San Francisco Railway Logo October 1940The St. Louis–San Francisco Railway (reporting mark SLSF), also known as the Frisco, was a railroad that operated in the Midwest and South Central U.S. from 1876 to April 17, 1980. At the end of 1970 it operated 4,547 miles (7,318 km) of road on 6,574 miles (10,580 km) of track, not including subsidiaries Quanah, Acme and Pacific Railway or the Alabama, Tennessee and Northern Railroad; that year it reported 12,795 million ton-miles of revenue freight and no passengers. It was purchased and absorbed into the Burlington Northern Railroad in 1980. Despite its name, it never came close to San Francisco.

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Logo of the Spokane Portland and Seattle RailwayThe Spokane, Portland & Seattle Railway (SP&S) (reporting mark SPS) was a United States-based railroad incorporated in 1905. It was a joint venture by the Great Northern Railway and the Northern Pacific Railway to build a railroad along the north bank of the Columbia River. Remnants of the line are currently operated by BNSF Railway and the Portland and Western Railroad.

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BurlingtonrouteThe Chicago, Burlington and Quincy Railroad (reporting mark CBQ) was a railroad that operated in the Midwestern United States. Commonly referred to as the Burlington or as the Q, the Burlington Route served a large area, including extensive trackage in the states of Colorado, Illinois, Iowa, Kansas, Kentucky, Missouri, Montana, Nebraska, Wisconsin, Wyoming, and also in New Mexico and Texas through subsidiaries Colorado and Southern Railway, Fort Worth and Denver Railway, and Burlington-Rock Island Railroad. Its primary connections included Chicago, Minneapolis-St. Paul, St. Louis, Kansas City and Denver. Because of this extensive trackage in the midwest and mountain states, the railroad used the advertising slogans "Everywhere West", "Way of the Zephyrs", and "The Way West". It merged into Burlington Northern in 1970.