Since the last of Union Pacific's fabled Big Boys were retired during the early 1960's many have wondered if one might ever be restored. They were immediate celebrities which instantly captured the public's imagination. Such prospects, of course, were incredibly slim considering the locomotive's size and girth; the cost was just too great for any historical organization to obtain the millions necessary in restoration costs. Only a major railroad had the necessary capital to do so. In December, 2012 news came that this nearly unthinkable possibility may actually occur when Union Pacific announced it was looking to purchase and restore a 4-8-8-4 for its Heritage Program. The announcement became official seven months later. On May 2, 2019, after three years of restoration, the big locomotive made its initial test run from Cheyenne to Greeley, Colorado.
Since Union Pacific's 4-8-8-4 Big Boy and Chesapeake & Ohio's 2-6-6-6 Allegheny made their respective debuts in 1941 debate has raged over which was more powerful. It continues into contemporary times. One could also throw in Norfolk & Western's masterfully engineered Y-6 2-8-8-2's for title of "largest" and "most powerful." In any event, such discourse will not be discussed here. The Big Boy was developed by American Locomotive and the vice president of Union Pacific's Department of Research & Mechanical Standards, Otto Jabelmann to fulfill a need; a steamer that could not only conquer the Wasatch Mountains' stiff grades but do so at a high rate of speed. This was, after all, the railroad's Overland Route main line and maintaining schedules were of critical importance. Initially, the 4-6-6-4 Challengers, unveiled in 1936, were developed for this task. (Several railroads went on to operate the 4-6-6-4 wheel arrangement including the Clinchfield, Delaware & Hudson, Rio Grande, Great Northern, Northern Pacific, Western Maryland, Western Pacific, and Spokane, Portland & Seattle.)
They proved quite adept (and UP continued purchasing more through 1944) but as tonnage and demand increased the railroad wanted something more; a single locomotive which could handle a heavy, 3,600-ton freight without assistance through this territory. Union Pacific's own team, in conjunction with Alco (both parties had also collaborated on the 4-6-6-4), significantly enlarged the Challenger to create the 4-8-8-4 Big Boy. The locomotive offered a tractive effort of roughly 135,000 pounds (37,650 pounds more than its smaller cousin) with speeds capable of 80 mph. According to Brian Solomon's book, "Alco Locomotives," the first Big Boy (#4000) was delivered to Union Pacific at Omaha, Nebraska on September 4, 1941. Over the next few years the railroad acquired a fleet that totaled 25, #4000-4024. During their short career that spanned only two decades the Big Boys were deemed a great success with many logging more than 1 million service miles. They were also beloved by crewman with one brakeman stating: "After all's said and done, they're quite an engine. Best mountain engine we ever had." A fireman added this, "They can say all they want to about the diesels, but when it comes right down to it these s.o.b.'s are tough beat on the hill - put a little warm water in'em and they'll go."
The #4014 was part of what was known as "Class 1," the first group of 4-8-8-4's delivered by Alco (her builder plate proudly displays the manufacturer and year she rolled out of the Schenectady, New York plant; September, 1941). In all these totaled twenty units, #4000-4019. (The second batch, #4020-4024 were listed as "Class 2" and slightly heavier although tractive efforts were the same.) During #4014's years of service it regularly muscled heavy freights over Wyoming's fabled Sherman Hill and across northern Utah, logging 1,031,205 miles in the process. According to Union Pacific the locomotive saw its last major overhaul in 1956 and then logged another 41,000 miles before being officially retired in December, 1961. By that time most of the Big Boys had met a similar fate with the final four remaining serviceable at Green River, Wyoming until September, 1962.
Only a month after retirement, #4014 was donated to the Southern California Chapter of the Railway & Locomotive Historical Society where she arrived on January 8, 1962 in Pomona at the Rail Giants Train Museum. Naturally, the big articulated steamer became a prized attraction at the Los Angeles County Fairgrounds. Over the years it was well cared for by volunteers and museum staff, allowing it to remain in relatively excellent condition (considering its age), which was also thanks to Southern California's dry, warm climate. According to the website SteamLocomotive.com, even into the 2000's #4014 still appeared as if it could steam away at a moment's notice, a deciding factor in Union Pacific selecting it for restoration. It seemed the Big Boy was destined to forever remain a tourist trap until the end of 2012.
On December 7th Trains Magazine broke a story that Union Pacific was studying the possibility of restoring #4014 as part of its Heritage Fleet based in Cheyenne, Wyoming. During the next seven months rumor and innuendo swirled regarding what was to happen. Finally, the unbelievable occurred on July 23, 2013 when Union Pacific officially confirmed it had reached an agreement with the Chapter to purchase #4014 and restore the massive steamer back to operational status. This news not only caught the attention of the railfan community but also the mainstream media. During early 2014 the Big Boy moved from its long-time home and returned to Wyoming, which drew coverage wide and far during its long trip, particularly the initial move out of the fairgrounds (which required temporary track laid across the parking lot).
After acquiring the Big Boy Union Pacific delayed its restoration until 2016 while the railroad overhauled stablemate #844. That August the project was launched. Thankfully, over the following three years no major delays or issues were found; #4014 had been well preserved and maintained by the chapter and dry climate. The only major change was upgrading her fuel from coal to #5 oil. It is not only cleaner but also greatly improved logistics. Following a series of updates on the restoration, a major event occurred on the night of May 1, 2019 when Union Pacific moved the locomotive moved out of the Cheyenne Roundhouse under its own power for the first time since making its final revenue run on July 21, 1959. The following day she stretched her legs by undergoing a test run to Greeley, Colorado. Over the next few days she made her way to Ogden to participate in the Transcontinental Railroad's sesquicentennial (May 9th). Following these festivities she will join UP's heritage fleet pool which includes 4-6-6-4 #3985, 4-8-4 #844, DDA40X "Centennial" #6936, and the streamlined "E" units to pull special excursions around the system.