Buenos Aires Great Southern Railway

Buenos Aires Great Southern Railway
Native name	Ferrocarril del Sud
Company type	Private
Industry	Rail transport
Founded	1863
Founder	Edward Lumb
Fate	Nationalised in 1948, became part of Ferrocarril General Roca
Headquarters	Buenos Aires, Argentina
Area served	Argentina (Buenos Aires Province and southern regions)
Key people	Edward Banfield (first general manager), Frank Parish (President), C.O. Barker (Secretary)
Products	Railway transport (passenger and freight)

The Buenos Aires Great Southern Railway (BAGS) () was among the prominent British-owned broad gauge () rail companies collectively known as the Big Four that established and managed vast railway systems across Argentina. Initiated by Edward Lumb in 1862, its inaugural general manager was Edward Banfield, whose name was later given to the Buenos Aires suburban station of Banfield, inaugurated in 1873. After the nationalization of Argentina's railways during President Juan Perón's administration in 1948, BAGS became part of the state-owned Ferrocarril General Roca.

Initial assessments

At Plaza Constitución, Buenos Aires, goods from southern Buenos Aires Province were transported by carts crossing the Riachuelo River via the "Puente de Gálvez." This method was both expensive and slow, restricting the distribution range of products. In 1860 alone, 7,416 carts delivered wool and leather to Constitución, each carrying between 25 and 100 kilograms.

Passenger travel faced similar constraints, with carriages making infrequent trips to locations such as Lobos, Cañuelas, and Bahía Blanca. These trips were slowed by poor road conditions and river crossings that required assistance from "cuarteadores," resulting in an average travel speed of only 80 km per day.

Given these limitations, Plaza Constitución was chosen as the terminus for a significant railway line intended to connect Buenos Aires with the southern region of the province.

Railway inception

In August 1861, British businessman Edward Lumb applied for a concession to construct a railway stretching from Constitución to Chascomús, approximately 120 km from Buenos Aires. He pledged $1,000,000 as a government guarantee. The Argentine Chamber of Deputies acknowledged the railroad’s critical role in national progress; Juan B. Alberdi remarked that it would unify the nation more effectively than political assemblies.

On May 27, 1862, legislation authorized President Bartolomé Mitre to enter into a contract with Lumb. The agreement stipulated a 7% return on construction expenses over a 40-year period but granted the company exemptions from taxes and customs duties. Additionally, the company was obligated to transport mail free of charge. The government maintained rights for expropriation with provisions for compensation. The rail gauge matched that of the Buenos Aires Western Railway, and permission was granted to build tramways connecting key points within the city. The contract was officially signed on June 12, 1862.

Originally, the planned route would have passed through San Vicente, but due to unsuitable terrain, it was redirected through La Paz (currently Lomas de Zamora), extending further toward Samborombón.

Unable to secure sufficient local investment, Lumb sought funding from London financiers Baring and David Robertson, who agreed to provide credit. The limited liability firm Buenos Aires Great Southern Railway (BAGSR) was formed in 1863. BAGSR engaged Samuel Petro & E. Ladd for construction work—including land procurement, station building, workshop establishment, and rolling stock acquisition—at a cost of GBP 651,000. Engineer Thomas Rumball was appointed for GBP 14,000 to oversee operations.

Prior to starting construction, William Wheelwright of Central Argentine Railway opposed BAGSR’s venture and discouraged cooperation from other British companies by alleging that BAGSR had been granted excessive advantages compared to CAR. This opposition delayed government approval until Robertson paid a GBP 22,000 bribe. Subsequently, the contract was amended to extend the line to include Dolores and Azul.

Construction

The commencement of construction took place on March 7, 1864, at the location now known as Constitución railway station, with a formal event attended by President Bartolomé Mitre and Governor Mariano Saavedra.

The initial segment of the railway, covering 77 km from Buenos Aires to Jeppener, was inaugurated on August 14, 1865. By December of the same year, the line was extended to Chascomús, reaching a total length of 113 km. Along this route, eleven stations were established, including Plaza Constitución, Barracas al Sud (currently Avellaneda), Lomas de Zamora, among others.

The original fleet consisted of eight locomotives supplied by Robert Stephenson and Company, 38 passenger carriages of first and second class manufactured by Brown, Marshalls and Co. Ltd., and 184 freight wagons.

Most of the track was single-lined, except for the double track segment between Constitución and Barracas, which facilitated access to workshops and maintenance depots.

Subsequent stations such as Barracas al Norte (now Hipólito Yrigoyen, opened in 1866), Burzaco (1867), and Lanús (1868) were added over time. Although track extensions halted until 1870, revenue continued to increase steadily. In that year, the railway transported 516,993 passengers and moved 54,116 tonnes of cargo.

Year	Km	Passengers	Tonnes of freight
1866	114	193,608	14,439
1867	114	363,705	23,636
1868	114	423,834	32,376
1869	114	521,991	47,184

The bridge over the Riachuelo

One significant engineering feat involved spanning the Riachuelo stream at Buenos Aires' southern edge. A double iron bridge was erected on three iron cylinders filled with concrete on each bank to support the dual tracks between Constitución and Barracas.

This original structure remained in service for 44 years before being replaced in 1909 by a movable bridge that operated until 1982. In that year, coinciding with the electrification of the line, a new concrete bridge took the place of the iron construction.

Expansion to Dolores and Azul

By the year 1880, the GSR railway had expanded to cover a distance of 562 km. The concession agreement mandated extending the line to Dolores or another city selected by the National Government. Accordingly, a branch was constructed from Altamirano to Río Salado (present-day General Belgrano Partido) in 1871, reaching Las Flores in 1872 and continuing to Azul by 1876.

Stations along this extension included Ranchos, Villanueva, Bonnement, Salado, Chas, San Pedro (then known as Newton), Rosas, Las Flores, Colorado (formerly Dr. D. Harosteguy), Pardo, Cacharí, Parish, Pinedo, and Azul.

Additionally, the branch extending from Chascomús was lengthened to reach Dolores in 1874. This extension incorporated stations such as Monasterio, Lezama, Guerrero, Taillade (currently Castelli), Sevigné, and Dolores itself at kilometer marker 203.

The urban section of Buenos Aires

The original Lomas de Zamora station was replaced during the early 1870s with a more modern facility. New stations were inaugurated at Temperley in 1871, Adrogué in 1872, and Banfield in 1873. At that time Temperley was a small agricultural settlement; Jorge Temperley donated land for its first station in 1871 before it was relocated later.

In 1877, BAGSR enhanced its freight handling capabilities by constructing new warehouses at Constitución station and acquiring land for a freight terminal located at Solá in Buenos Aires. The warehouse capacity at Barracas al Sud station was also expanded. That same year saw track renewals along with an extension of double tracks from Barracas to Altamirano.

Arrival of the Train in Tandil

Beginning in 1871, the company expanded through two main routes: one stretching from Altamirano to Azul, and another connecting Chascomús with Dolores and Ayacucho, which opened in 1880.

Amid concerns about potential expropriation by the Buenos Aires government, BAGSR leaders Frank Parish (President) and C.O. Barker (Secretary) negotiated terms to prevent the revocation of their concession. The firm agreed to construct two extensions: from Azul to Bahía Blanca and from Ayacucho to Tandil. The contract, signed in October 1881, required that the line reach Tandil within three years.

Construction work commenced in 1882 on the Ayacucho-Tandil segment, utilizing land acquired from Mari Blas Dhers for $200,000. The inaugural train arrived in Tandil on May 6, 1883, with the official opening of the route taking place on September 1.

Extensions toward Bahía Blanca

By 1884, Buenos Aires Province had seen the establishment of several towns, such as Azul (1832), Esperanza (1854), Las Flores, 25 de Mayo (both founded in 1856), Tapalqué (1863), Saladillo (1864), Arenales (formerly Ayacucho, 1866), Olavarría (1867), and Benito Juárez (1874).

Traveling between these communities was difficult and usually involved "galeras," large passenger wagons equipped to carry weapons for protection and capable of covering roughly 80 kilometers per day.

In 1866, the Argentine Government collaborated with the shipping firm Aguirre y Murga to initiate monthly passenger and cargo services linking Buenos Aires with Bahía Blanca and Carmen de Patagones, operating under a government contract.

The BAGSR extended its railway line to Olavarría by March 1883 and reached General Lamadrid in October of that year. By April 1884, the line arrived at Bahía Blanca, beginning passenger operations on July 7. The trip from Buenos Aires to Bahía Blanca required approximately 24 hours. At this point, BAGSR managed Argentina's most extensive rail system, encompassing 1,025 kilometers of track.

Concurrently, BAGSR developed a steel port facility in Bahía Blanca, completed in 1885. This port featured eight cranes, five railway tracks, and measured 300 meters in length by 200 meters in width.

Another branch was extended to Benito Juárez in 1885 and further reached Tres Arroyos by April 1886. Authorization was granted to continue the line from Tres Arroyos to Bahía Blanca, a project finalized by December 1891.

The Ensenada & Port Railway

The Buenos Aires and Ensenada Port Railway commenced public operations in 1866 with intentions to construct a new port that would replace the existing Port of Buenos Aires, although this plan was eventually abandoned. The founding of La Plata in 1882 prompted government-owned Buenos Aires Western Railway to build a new rail line terminating there, which limited expansion opportunities for BAEPR.

In 1888, BAEPR acquired a branch line running from Tolosa to Magdalena. The company also pursued growth by purchasing the Brandsen-Ringuelet branch and constructing a railway from Bartolomé Bavio near Magdalena to Álvarez Jonte in 1892; this line was extended further to Atalaya the following year.

Following a fire that destroyed Buenos Aires' Estación Central in 1897, BAEPR shifted its terminus to Casa Amarilla located in La Boca. This move rendered its Paseo Colón Avenue viaduct obsolete and caused a significant drop in both passenger numbers and revenue.

On July 1, 1898, the Great Southern Railway took over ownership of the Buenos Aires and Ensenada Port Railway.

Workshops

Initially situated at Barracas al Sud and later at Sola stations, the railway's maintenance facilities became inadequate as the network expanded. Consequently, in 1901, new workshops were constructed at Remedios de Escalada, located 11 km from Plaza Constitución. These workshops grew to become the largest in South America, employing close to 2,700 personnel. Fully equipped to manufacture locomotive and carriage components, their capacity increased further following the acquisition of the Bahía Blanca and North Western Railway workshops in Bahia Blanca in 1925.

At the same time, the company established "Colonia Ferroviaria," a residential area designed to accommodate workshop employees. By the late 1940s, the Escalada workshops had evolved into industrial plants producing a broad array of locomotive and coach parts.

The train arrives to the Atlantic

On 26 September 1886, the first train reached Mar del Plata, Argentina’s foremost summer resort. The BAGSR extended its reach along the Atlantic coastline by inaugurating branches to Balcarce in 1892 and subsequently extending service to Quequén, an important provincial port near Necochea.

By 1910, Mar del Plata’s thriving tourism sector—predominantly catering to aristocratic visitors—exceeded the existing station's capacity. Although local authorities urged expansion, the company was reluctant due to peak demand being limited to certain seasons.

As urban growth shifted southwest toward the shoreline, the original station became increasingly distant from major hotels and residential areas. Law 5.535 (1908) granted BAGSR permission to construct a new station.

Local resistance led by pioneer Pedro Luro prevented demolition of the old station and influenced relocating the new station away from densely populated zones despite higher costs. Construction commenced in 1909; a temporary wooden facility opened on December 1, 1910, at "Mar del Plata Sud" for the 1910–11 summer season. The original "Mar del Plata Norte" station continued operations.

The newly built station included two expansive platforms, a main building, a postal warehouse, and a signal cabin. Although initially intended to serve all trains, only express services stopped there after BAGSR received government approval; other trains terminated at Miramar and could not be redirected.

Expansion (1865–1899)

From its inception through the 1890s, BAGSR underwent considerable growth, extending its rail lines to key urban centers throughout Buenos Aires Province. The table below summarizes significant branch inaugurations during this era:

Branch	Opening Date	Distance (km)
Buenos Aires to Jeppener	14 Aug 1865	77
Jeppener to Altamirano	14 Dec 1865	10
Altamirano to Chascomús	14 Dec 1865	26
Altamirano to Ranchos	1 Mar 1871	24
Ranchos to Gral. Belgrano	19 May 1871	32
General Belgrano to Las Flores	1 Jul 1872	64
Chascomús to Dolores	10 Nov 1874	90
Las Flores to Azul	8 Sep 1876	109
Dolores to Maipú	7 Dec 1880	68
Maipú to Ayacucho	7 Dec 1880	62
Azul to Olavarría	15 Mar 1883	43
Ayacucho to Tandil	19 Aug 1883	63
Olavarría to General La Madrid	1 Oct 1883	93
Gral. La Madrid to Bahía Blanca	7 May 1884	261
Tandil to Benito Juárez	8 May 1885	85
B. Juárez to Tres Arroyos	2 Apr 1886	89
Maipú to Mar del Plata	26 Sep 1886	129
Merlo to Lobos	21 Jun1890	64
Lobos to Saladillo	21 Jul1890	87
Temperley to Cañuelas	12 Mar1890	47
Las Flores toTandil	1 Aug1891	151
Tres Arroyos toBahía Blanca	2 Dec1891	192

Additional lines inaugurated between the early and late years of the decade linked vital agricultural hubs and port cities such as Loma Negra, Balcarce, Quequén, Necochea, Navarro, and Bolívar—further integrating regional commerce.

Plans drafted since 1884 aimed at extending rail from Dolores toward Mar de Ajó on the Atlantic coast were ultimately never executed.

Regarding diversification efforts, in 1885 Dávila y Compañía received a concession for a tramway connecting Olavarría station with the San Jacinto quarry. This tram line was transferred to BAGSR in 1889 and opened for public freight use in 1893, enhancing transportation of quarry materials.

By the early twentieth century expansions included branches from General Guido reaching Juancho (extending up to Vivoratá by1912), along with lines linking Bosques-Berazategui, Neuquén-Zapala and Álvarez Jonte-Las Pipinas. These developments brought total network length close to approximately6,082 km by that period.

Temperley station

The establishment of La Plata acted as a catalyst for railway expansion. The Buenos Aires Western Railway constructed a route stretching from La Plata to Haedo, traversing the province from the southern to western regions.

Managers at BAGSR aimed to link Constitución and La Plata stations by connecting their network with the Western Railway, creating competition against the Buenos Aires and Ensenada Port Railway service reaching La Plata. This initiative also received backing from the Western Railway.

In February 1884, a connection between José Mármol and Temperley station was inaugurated, allowing both passenger and freight operations between Constitución and La Plata. Subsequently, a new station building at Temperley was opened in 1888.

Extensions

In 1906, BAGS proposed extending the railway from Zapala, near the Chilean border, through the Andes to Lonquimay, Chile. However, due to insufficient funding, this plan was never executed. This extension would have complemented the Transandine Railway, which had begun service in 1910 linking Mendoza, Argentina with Los Andes, Chile.

Additional principal routes included Buenos Aires via Bolivar to Carhué, through Maipú to Tandil, and via Chas and Ayacucho to Necochea. There were also lines from Bahía Blanca extending to Toay in La Pampa Province and to Huinca Renanco in Córdoba Province.

Partido del Tuyú

While BAGSR connected Constitución with Mar del Plata, agricultural producers along the coast faced lengthy journeys inland to access stations. They petitioned for a coastal branch line to streamline the transportation of their goods.

A landowner sold property for the establishment of "Divisadero" station (present-day General Madariaga) located at kilometer 71.68 on the General Guido branch.

The branch line from General Guido reached Juancho on November 7, 1907. By 1912, rails extended further to Vivoratá, incorporating three intermediate stations and creating an alternate connection back to the main Constitución–Mar del Plata line.

This railway development stimulated local economies by expanding production beyond cattle ranching to include apples and firewood. It also encouraged the construction of smaller branches, such as one near what is now the entrance to Pinamar at the intersection of RP 11 and RP 74. Most of these minor branches were dismantled during the 1940s.

Growth

By 1930, BAGSR had evolved into one of the region’s largest enterprises, boasting assets such as 8,000 km of track, 504 stations, 857 steam locomotives, 955 carriages, 16,602 coaches, and employing over 30,000 personnel. The Ferrocarril del Sud played a pivotal role in fostering urban growth within Buenos Aires Province by linking suburban zones with the capital city and facilitating agricultural exports through ports in Buenos Aires, Necochea, and Bahía Blanca. Its subsidiaries managed a fruit plantation in Río Negro Province, an energy facility in Bahía Blanca, as well as hotels located in La Ventana and Miramar.

The company was responsible for constructing the port of Ingeniero White, including docks capable of accommodating four steamships. Alongside other British-owned rail companies, BAGSR collaborated in forming the "Compañía Ferrocarriles de Petróleo" in Comodoro Rivadavia, which provided fuel oil necessary for locomotive operations.

BAGSR reached its zenith during the late 1920s; however, increasing operational expenses, depreciation of the Argentine Peso, and competition from road transport contributed to diminishing profitability. After Argentina’s railways were nationalized under President Juan Domingo Perón, the company was rebranded as "Ferrocarril General Roca".

Ports

Puerto Ingeniero White, integrated into the Bahía Blanca port network, was established by the company with the installation of two grain elevators in 1908 to accommodate the increasing volume of grain exports, alongside a jetty designed for four steamship berths. In collaboration with other British railway enterprises, BAGSR held financial stakes in Compañía Ferrocarriles de Petróleo based in Comodoro Rivadavia, which was a primary supplier of their fuel oil. Additionally, the railway managed the South Dock located at the entrance of the Riachuelo River in Buenos Aires.

Traffic

The transportation of goods such as grain, livestock, and fruit originating from the Rio Negro valley was mostly seasonal, mirroring the pattern of summer tourism to destinations like Mar del Plata, Miramar, and Necochea. Outside of suburban routes near Buenos Aires and Bahía Blanca, three principal lines linked these cities: one direct route passing through Las Flores, Olavarría, and Coronel Pringles; a second variant traversing General La Madrid and Saavedra; and a third via Las Flores and Tres Arroyos. Services extending past Bahía Blanca towards the Plaza Huincul oilfield and continuing to Zapala in Neuquén Province evolved from simple through coaches to dedicated full train operations departing from Buenos Aires due to rising demand.

Decline

From 1907 to 1914, Argentine railways expanded at an average rate of 1,800 km annually, reaching a total network length of 33,000 km—outpacing European railway growth during the same timeframe. Nevertheless, this period of rapid development ceased with the outbreak of World War I, as only 100 km of track were added between 1917 and 1922.

British-owned companies encountered escalating expenses, diminished global trade activity, and increasing labor union pressures. Under President Marcelo T. de Alvear in 1922, efforts were made to foster cooperation with British firms, which rebounded after the war and recorded annual profit increases averaging 5% from 1921 (and 9% since 1924).

The onset of the Great Depression combined with government policies aimed at expanding an extensive road infrastructure under the "Dirección Nacional de Vialidad" created significant challenges for British railways. The growth of automobile transportation led to a sharp decline in railway investments, as many new roads were constructed parallel to existing rail lines. The government's strategy sought to reduce railway dominance by encouraging competition through road transport alternatives.

During World War II, most steam locomotives—predominantly British-made—operated on oil fuel readily available in Argentina, whereas coal had to be imported. Heavy freight services, particularly during harvest seasons, frequently required robust three-unit articulated Garratt locomotives.

Nationalization

In 1948, under President Juan Peron, Argentina undertook the nationalization of its railway system. The BAGS was merged into the General Roca Railway, one of six divisions within the state-owned enterprise Ferrocarriles Argentinos. This division also incorporated former state railways such as the Ferrocarriles Patagónicos, including the line running from Carmen de Patagones to Bariloche, the narrow gauge route between Ingeniero Jacobacci and Esquel (known as La Trochita), as well as the southern section of the French-owned Rosario and Puerto Belgrano Railway.

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