Bomber Spur
In 1941, on the outset of the United States' direct involvement in World War II, a new plant was built on the west side of Fort Worth, Texas, officially named Air Force Plant #4. Its sole purpose was to build B-24 Liberators by the Consolidated Vultee Aircraft Company. The plant continues to manufacture airplanes to this day, and has seen many contractual owners since the war: Convair, General Dynamics, and now Lockheed Martin. It has also produced many planes in its history; after the B-24 during WWII, it also produced B-29s, B-36s, B-52s, F-111s, F-16s, F-22s, and F-35s, the last three of which it currently produces.
During WWII, materials and prefabricated parts for the bombers needed to be shipped to the bomber plant; it was deciced to ship them in via railroad. Thus, the government contracted the Texas & Pacific Railroad to build a railroad spur from the T&P's mainline (about 5 miles to the south) to the plant. And so the "Bomber Spur" was born. Soon after, Carswell AFB needed jet fuel for their airplanes, so the T&P constructed a spur to Carswell that connected to the Bomber Spur that served the plant.
Officially known as "Carswell AFB Industrial Lead", the Bomber Spur served both the "bomber plant" and Carswell. It handled bulk materials to the bomber plant (in various types of cars), and jet fuel to Carswell (mainly in tanker cars). After the war, the spur was used for many years with decreasing regularity. After some time, a pipeline was installed to transport jet fuel to the base, thus the tracks to the base were no longer need or used. The arrival of bulk materials to the plant by truck was a sign of the beginning of the end for the Bomber Spur, and the tracks lay dormant for a few years before finally being removed.