Aerial photograph of the Longview plant of R.G. LeTourneau, Inc., likely taken in the 1970s. The five domes, or semispheres, provided a unique aspect and were a familiar site in South Longview.

Photograph of the entrance to Marathon LeTourneau Company in Longview, Texas. In 1970, Marathon purchased R.G. LeTourneau, Inc. after the death of its founder, R.G. LeTourneau, and renamed the company "Marathon LeTourneau Company." The manufacturing facility was sold several more times and is now owned and operated by Komatsu.

Photograph of repairs being made on a rolling mill machine, likely in the Longview Texas, plant given the date of creation.

Photograph of two women and a man at the Snack Shack at R.G. LeTourneau, Inc.

Photograph of three women and a man at the Snack Shack at R.G. LeTourneau, Inc.

Photograph of several men waiting to be served at the Snack Shack at the R.G. LeTourneau Longview, Texas plant.

Photograph of several men waiting to be served at the Snack Shack at the R.G. LeTourneau plant in Longview, Texas.

Photograph of two men being waited upon by a woman in the Snack Shack at R.G. LeTourneau, Inc.'s Longview, Texas plant.

Photograph of two women and two men at the Snack Shack at R.G. LeTourneau, Inc. in Longview, Texas.

Photograph of Tree Roller, 20 feet wide, 42 tons, being used in the Sabine River Bottom.

Photograph of a 360 Electric Digger, an earth-moving machine with three large bowls filled with dirt, with large wheels and motors at either end and in between the bowls, including an operator partially visible in the center part of the vehicle. The Digger is in a large, empty dirt area and a wall of scraped dirt is partially visible at the back of the equipment, with trees visible in the far background.

Photograph of the R.G. LeTourneau plant in Longview, Texas. The first of these five domes, the one in the foreground, was built in 1962, while the final three were built in 1965. Two of the domes have been destroyed in separate weather events in 2018 and 2021. Each dome is 85-feet high and contains 70,000 square feet of space.

Photograph of the Model TC-497 Overland Train Mkii, the largest and most powerful of all the "land trains" produced by LeTourneau. The TC-497 was built for the U.S. Army to transport cargo in the Arctic under a wide variety of road conditions, according to author Eric Orlemann. It contained nine cargo trailers, a control car and two trailing power units. The TC-497 weighed 135 tons. Its overall length was about 527 feet.

Photograph of the Model TC-497 Overland Train Mkii, the largest and most powerful of all the "land trains" produced by LeTourneau. The TC-497 was built for the U.S. Army to transport cargo in the Arctic under a wide variety of road conditions, according to author Eric Orlemann. It contained nine cargo trailers, a control car and two trailing power units. The TC-497 weighed 135 tons. Its overall length was about 527 feet. One of the LeTourneau domes is visible in the background.

Photograph of the Model TC-497 Overland Train Mkii, the largest and most powerful of all the "land trains" produced by LeTourneau. The TC-497 was built for the U.S. Army to transport cargo in the Arctic under a wide variety of road conditions, according to author Eric Orlemann. It contained nine cargo trailers, a control car and two trailing power units. The TC-497 weighed 135 tons. Its overall length was about 527 feet. An unidentified U.S. Army official is pictured talking to the driver in the cab.

Photograph of a Series K-205 diesel-electric-drive tractor-dozer, the largest and most powerful dozer of its day, according to author Eric Orlemann. The dozing blade was 20 feet wide, and the overall working weight of the K-205 was 160 tons. Only one of these massive machines was ever produced.

Photograph of an early version of LeTourneau's FL-50 Fork Lift Truck, shown picking up an 18-wheeler trailer. The company began making the trucks in mid-1961, according to author Eric Orlemann. A total of four of the FL-50 Fork Lift Trucks were built.

Photograph of the 60-ton capacity Pacemaker Series L-67 Electric Digger, first introduced in March 1960, according to Eric C. Orlemann. Its payload capacity was 60 tons.

Photograph of a LeTourneau Sheep's Foot Roller, used to compact dirt.

Photograph of a 1959 version of the LeTourneau Sheep's Foot Roller, used to compact dirt. The original version was built in 1929, according to Eric. C. Orlemann.

Photograph of iron ingots being melted at the rolling mill, likely in Longview, Texas.

Photograph of a LeTourneau transporter with a log bunk. The original unit was built in 1955, according to author Eric Orlemann.

Photograph of a LeTourneau Model C-6 Transporter carrying a tree roller. The transporter had six electric drive wheels and a load capacity of 35 tons, according to Eric C. Orlemann

Photograph of a LeTourneau tong crane picking up an automobile as a man watches. The inscription on the front of the crane indicates the photograph was taken in Longview, Texas, which was the primary plant and headquarters of the company by 1956.