Southern Pacific

In 1913, thirty more "Mikdos" arrived on the Pacific Lines from Baldwin and were very similar to the ones received in 1911. They were designated as Class MK-4. Twenty-five were assigned road numbers 3216 through 3240. Five of these locomotives were assigned to the Arizona Eastern Line and were given Arizona Eastern numbers 901 through 905. Later, the five Arizona Eastern locomotives were renumbered to 3236 through 3240 and the original locomotives received with these numbers were renumbered to 3271 through 3275.

Also in 1913, Baldwin delivered another thirty-four 2-8-2s to the Southern Pacific. Nine went to the Pacific Lines and given road numbers 3241 through 3249 and twenty-five were delivered to the Atlantic Lines T&NO and were given T&NO road numbers 750 through 774. These locomotives were designated as Class MK-5 and had 57" diameter drivers, 26" x 28" cylinders, a 200 psi boiler pressure, they exerted 51,080 pounds of tractive effort and each weighed 280,300 pounds. The fire box was 242 square feet, the evaporative heating surface was 4,215 square feet and with the superheater the combined heating surface was 5,105 square feet.

In 1914, one more Baldwin-built Class MK-5 "Makado" was added to the Pacific Line roster. This locomotive was given road number 3270. In the same year Pacific Lines received twenty 2-8-2s from the Lima Locomotive Works. These locomotives were designated as Class MK-6 and were assigned road numbers 3250 through 3269. They had 63" diameter drivers, 26" x 28" cylinders, a 210 psi boiler pressure, they exerted 53,630 pounds of tractive effort and each weighed 280,700 pounds. The fire box was 242 square feet, the evaporative heating surface was 4,215 square feet and with the superheater the combined heating surface was 5,105 square feet.

The Atlantic Lines - T&NO received twenty new Class MK-5 "Mikados" in 1916. These locomotives were built by the American Locomotive Company and were given T&NO road numbers 775 through 794. The Lima Locomotive Works built two more Class MK-5 locomotives for the Pacific Lines Arizona Eastern Line in 1917. The pair was given Arizona Eastern road numbers 906 and 907 and later was renumbered to Southern Pacific Lines numbers 3276 and 3277.

During 1919 through 1921 the Southern Pacific built twelve 2-8-2-type locomotives. They were built to the same specifications as the Class MK-5 locomotives. The group was assigned to the Atlantic Lines T&NO was given T&NO road numbers 738 through 749.

In 1924, the Southern Pacific took over the El Paso & South Western Railroad and as a result added another twenty-five "Mikado" type locomotives to it roster. The locomotives were of three different designs and accordingly were designated as three different classes. The first group of ten was designated as Class MK-7 and given road numbers 3300 through 3309, the second group of five was designated as Class MK-8 and assigned road numbers 3310 through 3314 and the last group was designated as Class MK-9 and assigned road numbers 3315 through 3324.

There were four other "Mikados" on the Southern Pacific roster. Two conveyed with the purchase of the Minaret & Western in 1935 and were given road numbers 3295 and 3296. The other two were bought second hand from the Newaukum Valley Railroad during 1943. The pair was assigned road numbers 3297 and 3298.

There are four surviving Southern Pacific 2-8-2 "Mikados" type locomotives. All four are former T&NO locomotives. Number 745 which is in storage near the Ochsner Hospital in New Orleans, LA; number 771 on display at Grapevine Vintage Railroad in Grapevine, TX, number 786, which is owned by the Austin Steam Train Association and is undergoing restoration on the Austin & Texas Central in Austin, TX; and number 794 on display at Sunset Depot in San Antonio, TX.

El Paso & Southwestern

At the turn of the twentieth century, to meet demands for copper, Phelps Dodge replaced the smelter at Bisbee with a new, larger one at the newly formed town of Douglas, AZ. In 1901, the Arizona & Southeastern extended its line 25 miles southeast to Douglas to provide transportation to this new smelter.

In 1901, the Phelps Dodge Corp. formed El Paso & Southwestern Railroad Co., and transferred over the properties of its Arizona & Southeastern Railroad to it. The EP&SW laid rail and purchased the El Paso & Northeastern Railroad. Additional branches were acquired and a branch to Tombstone, AZ was built in 1903. The mainline was extended from Benson to Tucson in 1912. Another branch line was constructed to Tyrone in 1921. A merger with the Arizona & New Mexico Railroad was finalized on January 1, 1922, including the old Lordsburg& Hachita Railroad.

After WW I, the price of copper began to drop, mines in the area to cease or reduce their operations. Traffic on the El Paso & Southwestern was drastically reduced andPhelps Dodge Corp made the decision to sell the El Paso & Southwestern Railroad. By this time it consisting of over 1,200 miles of track. The Southern Pacific bought the El Paso & Southwestern on November 1, 1924.

The first "Mikado" type locomotives on the El Paso & Southwestern arrived in 1913 with the arrival of the first batch of the ten that the American Locomotive Company would build between 1913 and 1916. These ten locomotives would carry road numbers 363 through 372. They had 63" diameter drivers, 29" x 30" cylinders, a176 psi boiler pressure, exerted 59,910 pounds of tractive effort and each weighed 323,000 pounds.

In 1918, the USRA allocated five "Mikado-Heavy" type locomotives to the EP&SW which were built by ALCO. They were given road numbers 373 through 377. These locomotives had 63" diameter drivers, 27" x 32" cylinders, a190 psi boiler pressure, exerted 59,802 pounds of tractive effort and each weighed 325,000 pounds.

A final group of "Mikados" were delivered from ALCO in 1920. They were assigned road numbers 378 through 387. These locomotives were close copies of the ones delivered in 1916.

There are no surviving EP&SW 2-8-2 "Mikado" type locomotives.