Courtesy of the Utah State Historical Society

On this Labor Day, here's an historic look back at many of the people who contributed to building the landmarks, infrastructure and economy of the state of Utah (along with a few sprinklings of Arizona, Wyoming and Colorado thrown in for good measure).

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Men do some cement work in a trench along a street in the Avenues during a Salt Lake City sewer construction project.

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Men operate a large piece of equipment as they pave 1300 East.

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The Brotherhood of Boilermakers float moves down the street in the Labor Day Parade in Salt Lake City.

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A. A. Clark employees pour cement at the Salt Lake City Stables.

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Abrams and Sullivan Contractor workers mud the ceilings and walls of an unknown building.

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Two men stand in a large metal vent at the Garfield Mill.

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Workers pose next to a new Ketchum Builder's Supply Co. truck in this May 9, 1935 photo.

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Anchor Mine workers pose inside of the Park City mine alongside some equipment.

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This 1922 photo shows employees of the Baldwin Radio Manufacturing Company hard at work.

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This photo shows a group of workers and machinery on the floor of the Salt Lake Engineering Company machine shop.

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Workers in the mining town of Bingham build a bridge for the Copper Belt Railroad above Car Fork. At its peak, Bingham was seven miles long, but less than a city block wide.

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A group of union workers prepare to walk in the Labor Day Parade.

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A Civilian Conservation Corps worker plants trees.

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Men build a bridge over Sacramento Ravine in 1877 during Central Pacific Railroad construction.

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The Christensen Construction Company does some excavation work on the side of the Utah State Capitol.

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Several men stand in a pipeline trench during the construction of the City Creek aqueduct.

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Uniformed car men march down Main Street in the Labor Day Parade.

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Several horse teams and wagons work in the city dump.

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Several men stand near the end of a pipeline during the construction of the City Creek aqueduct.

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A man stands near the mine entrance at Clear Creek. Clear Creek was established in the 1870s and grew into a full mining town after a vein of coal was uncovered in 1898. The town began to decline in the mid-1950s.

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Railroad workers are seen on a train near the summit of Pike's Peak.

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Ore from the open pit mine in Bingham is loaded into the company-owned rail cars. The ore was later transported to the mills at Magna and Arthur.

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This photo of Copperton, Utah, shows the Utah Copper Company archway into the park, as well as the Bingham Stage Line Company bus. Copperton was built as a model mining town for employees of the Utah Copper Company when Bingham became overcrowded.

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The Barber's Union marches in the Labor Day Parade in Salt Lake City.

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This photo shows the interior of the Daly Mine carpenter shop and several workers.

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Denver & Rio Grande railroad workers pose in front of an engine.

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Inside Wiremen march in the Labor Day Parade in Salt Lake City.

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Two men work to pave part of 1300 East.

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This Nov. 15, 1940 photo shows a farmer working in his field.

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This photo, taken during the construction of the Flaming Gorge Dam, shows a drilling and grouting operation in the diversion tunnel.

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This photo, taken during the construction process of the Flaming Gorge Dam, shows men doing excavation for the keyway on the right abutment. The workers are using a high pressure water jet to remove loose material. An "Air Trac" drill is also shown in the photograph.

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The Salt Lake Typographical Union marches in a Labor Day Parade.

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This image shows the construction progress on the 400 South Denver and Rio Grande viaduct. The roof of the Denver and Rio Grande Depot can be seen in the background.

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This March 6, 1958 photo shows construction work on the Glen Canyon Dam.

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This image shows a group of men posing for a photograph on the steps of the Salt Lake City and County Building on the day of the Labor Day Parade.

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Iron worker union men pose for a photograph during the construction of the Rio Grande Depot.

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Plasterers march in the Salt Lake Labor Day Parade. Their banner says, "Plasterers International Union, No. 68 of Salt Lake City."

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Iron workers prepare their float for the Labor Day Parade.

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Japanese immigrants pause during their railroad work to pose for a photo. The first job that many Japanese immigrants found was on railroad section gangs, and at one time, 13,000 Japanese worked on railroads.

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This image shows a crew of men working on the construction of a new bridge crossing the Jordan River at 3300 South.

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Horseshoers march in the Labor Day Parade in Salt Lake City.

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Structural Iron Workers stand on the iron workers float used during the Labor Day Parade in Salt Lake City.

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People march in and observe the Labor Day Parade.

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Ralph Burtenshaw and Lawrence Hawkins inspect a load of logs heading for Johnson Creek Sawmill on the Blue Mountains in this 1950 photo.

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Workers pause and pose for a photo during the construction of the Majestic Park Dance Hall, July 23, 1916. The dance hall was located on 9th South between Main Street and State Street.

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This photo shows the Marsac Mill in Park City.

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This photo shows workers at a mining camp. It was taken in 1920 or earlier.

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This image shows the construction progress on the Mountain Dell Dam, up Parleys Canyon.

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Two workers in the Mountain View Mine are seen in this photo.

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This image shows the construction progress of the new Orpheum Theater, which was renamed the Capitol Theater in 1927.

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The Labor Temple Band poses in this October 16, 1926 photo.

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This December 1, 1911 image shows the excavation progress of the Walker Bank Building on Main Street and 200 South.

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The photo caption on this photo, which shows men paving the road in Ogden Canyon, states, "Odgen Canyon, Weber Co., Utah. Paved with 1 1/2" Warrenited Bitulithio on 1 1/2" Bituminous Concrete Base, Open to Traffic During Construction."

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The Painters and Decorators Union marches in the Salt Lake Labor Day Parade. The banner says, "Brotherhood of Painters, Decorators, and Paperhangers of America."

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Men known as "roughnecks" work in the oil drilling industry.

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The Salt Lake City Fire Department wagons ride down Main Street during the Labor Day Parade.

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This 1927 image shows a crew of P. J. Moran employees working on the construction of the Parleys Sunnyside Conduit.

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This 1927 image shows a crew of P. J. Moran employees working on the construction of the Parleys Sunnyside Conduit.

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Plasterers pose for a photograph before walking in the Labor Day Parade in Salt Lake City.

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Streetcar men march in a Labor Day Parade.

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Striking members of the Telegraphers Union march in the Labor Day Parade in Salt Lake City.

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This photo commemorates the completion of the continental railroad at Promontory Point in Utah. The Joining of the Rails celebration took place on May 10, 1869.

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Men prepare to cut into the mountainside to make tunnels for the railroad.

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Men work on the Salt Lake and Jordan Canal at 1200 South 1100 East.

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Men work inside the Salt Lake Flour Mill in this May 17, 1974 photo.

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Men, teams of horses, and a steam-powered shovel work on the excavation and construction of the Walker Bank Building.

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A P. J. Moran steam tractor pulls a scraper and loader along 200 South during a road construction and paving project.

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This photo shows the early excavation and construction work for the Exchange Place, behind the Boston and Newhouse Buildings. This image is taken from the State Street area, looking toward Main Street.

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This image shows some road construction, trolley line construction and paving work taking place at the intersection of Main Street and South Temple. The excavation is underway for the Hotel Utah, which can be seen in the background.

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Men pose on a train atop the Devil's Gate Bridge in Weber Canyon.

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A Union Pacific Railroad construction camp is seen at Monument Point, with a Jupiter Engine poised on the rails, May 9, 1869.

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This image shows the excavation and construction progress of a new building at the University of Utah. The "U" on the mountain can be seen in the background.

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The Carpenters and Joiners Union marches in the Labor Day Parade in Salt Lake City.

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P. J. Moran construction workers pose for a photograph while working on a Salt Lake City underground sewer line.

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Mine workers enter a cage to go down into mine.