The Whipple Bowstring Truss Bridge was built from a design patented in 1841 by Squire Whipple. Whipple was the first person to understand the stresses in truss members and he developed the first theoretical formula to calculate stresses in the articulated truss. His bowstring truss was the first to use cast iron for compression and wrought iron for tension membranes.
1981
YearAdded:
Image Credit:
Courtesy Wikicommons/Rehrenberg
Image Caption:
A Whipple Bowstring Arch/Truss style bridge, built by S. DeGraff in Albany, NY
Era_date_from:
1855
1981
Washington State: DC Zip: Country: USA Website: http://www.asce.org/Project/Washington-Monument/ Creator: Casey, Thomas Lincoln
Upon its dedication in 1885, the Washington Monument was the tallest structure in the world. Begun in 1848 to honor George Washington, the structure wasn't completed for over 36 years. Construction and financing problems slowed progress and the Civil War halted it completely.
YearAdded:
Image Credit:
Courtesy Flickr/Sebastien Fuss (CC BY-SA 2.0)
Image Caption:
Washington Monument
Era_date_from:
1885
1981
St. Louis State: MS Zip: Country: USA Website: http://www.asce.org/Project/Union-Station/ Creator: Link, Theodore , Pegram, George
In the early 1900s, Union Station was the hub of passenger railroad traffic in the central United States. It was one of the first stations to serve as a centralized terminal for multiple railroad lines. It originally served 22 rail lines; 13 from the east and nine from the west.
YearAdded:
Image Credit:
Courtesy Flickr/Ron Reiring (CC BY 2.0)
Image Caption:
Union Station
Era_date_from:
1894
1981
The Borden Base Line is a 39,009.73 feet (7.42 miles ) survey line through the State of Massachusetts. The line was the first project of its kind undertaken in America and its establishment was the key element for Massachusetts pioneering mandate to survey the entire state.
The challenge was to use trigonometrical principles, instead of astronomical observation alone, to provide greater accuracy in surveying large areas.
YearAdded:
Image Credit:
Public Domain (Copyright Exp.)
Image Caption:
An 1871 map of Massachusetts highlighting the Borden Base Line
Era_date_from:
1831
1981
This was one of the first power facilities to demonstrate the feasibility of long distance electric power transmission. Through an elaborate switchboard at the main station, tied to similar boards at substations, a complete circuit was created to drive an electric motor 153 miles from the generator a remarkable distance at that time.
YearAdded:
Image Credit:
Courtesy Flickr/Allen Sheffield (CC BY 2.0)
Image Caption:
Snoqualmie Falls
Era_date_from:
1899
1981
The increased light-grasp of this telescope made possible many notable advances in structural cosmology between 1924 and 1930, which have revised our ideas about the universe. One of these advances was that spiral nebulae are galactic units like our own; another was the idea of an expanding universe. George Ellery Hale began planning this project in 1906; Francis G. Pease was the chief designer and mechanical engineer. The telescope's mirror support and the use of mercury flotation to reduce the friction are among its outstanding mechanical engineering features.
YearAdded:
Image Credit:
Courtesy Flickr/Bruce Irving (CC BY 2.0)
Image Caption:
Mount Wilson Observatory, 100-inch Hooker Telescope
Era_date_from:
1918
1981
The Charles River Basin was one of the pioneering environmental engineering projects in America. The project transformed 675 acres of unhealthy and unsightly salt marshes and tidal flats were into an environmental centerpiece for the Boston area by 1910. This was one of the first public projects to radically improve the environment and has served as a model for similar projects around the nation.
YearAdded:
Image Credit:
Courtesy Wikipedia/Daderot (CC BY-SA 3.0)
Image Caption:
Charles River Basin Project
Era_date_from:
1910
1981
This facility was typical of others in the country that made small spherical lead shot for the fowling pieces of frontier settlers. Smelted lead from the nearby Austinville mines was melted at the top of the tower and poured through a sizing sieve to produce small droplets. Surface tension caused the molted lead to assume a spherical shape that solidified during its 150-foot fall. The shot was then collected in a water-filled kettle at the bottom of the shaft. The "drop process" was patented in England in 1769 by William Watts, a craftsman of Bristol, England.
YearAdded:
Image Credit:
Courtesy Wikipedia/Dr00bie (CC BY-SA 3.0)
Image Caption:
Jackson Ferry Shot Tower
Era_date_from:
1807
1981
The first practical demonstration of this tractor took place in a peat field on Roberts Island on November 24, 1904, and was patented and in production by December of 1907. The existing machine represents the earliest gasoline-powered track-type tractors that were to help revolutionize agriculture, logging, construction, road building, and transportation around the world. Its design and development is credited to Benjamin Holt (1849-1920), president of the Holt Manufacturing Company of Stockton.
YearAdded:
Image Credit:
Public Domain (Copyright Expired)
Image Caption:
The Holt 75 model gasoline-powered Caterpillar tractor used early in World War I as an artillery tractor. Later models were produced without the front "tiller wheel."
Era_date_from:
1918
1981
Designed and built by Fred Graue, a German immigrant, together with William Asche, the Old Graue Mill began operating around 1852 and served the village of Brush Hill (Hinsdale) until World War I. Its undershot waterwheel, wooden gearing system, belt power transmission, bucket elevators, and related bolters and sifters were representative of an ancient technology that began with Roman engineer Vitruvius. It ground wheat, corn, oats, and buckwheat in an era that was on the threshold of the Industrial Revolution.
YearAdded:
Image Credit:
Public Domain (Historic American Buildings Survey)
Image Caption:
Graue Mill
Era_date_from:
1852
1981
Innovations
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This 50,000-ton die-forging press is among the largest fabrication tools in the world. It was designed and built for the U.S. Air Force by the Mesta Machine Company of Pittsburgh, following the discovery of a 30,000-ton press used by the Germans in World War II (later acquired by the Soviet…
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The George Washington Bridge represented a departure in suspension bridge design. Chief Engineer O.H. Ammann developed a system of stiffening trusses that offered greater flexibility and saved the project…
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Montogomery Bell was a land developer and iron maker who purchased the Harpeth Narrows site to expand his industrial empire - which ultimately consisted of 14 iron blast furnaces throughout middle Tennessee.
The Harpeth River makes a tight bend around a steep limestone ridge, losing 17…
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Clarifying the turbid waters of the Mississippi River for use as drinking water was a formidable challenge. The Chain of Rocks Water Purification Plant provided the first application of a system of flocculation, sedimentation, and rapid sand filtration for water purification.
The system…
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At the site of the first water pumping station providing water and sewage systems to the City of Erie in 1868, the Chestnut Street Pumping Station houses one of the largest steam engines, which pumped 20 million gallons a day. The triple-expansion steam reciprocating engine, which pumped water…
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In 1899, engineers from the City of Chicago's Division of Bridges and Viaducts performed a survey of moveable bridge design in the U.S. and Europe. Their study led to the conclusion that the unusual trunnion bascule design would best meet their needs.
The Cortland Street…
The introduction of steam-powered forging hammers by French and British engineers of the 1830s led to the building of this impressive hammer at Creusot that delivered blows to shape and strengthen iron and steel objects before forging. It was for years the most powerful steam hammer in the world.… Read More
Edison's simple and unprecedented instrument allowed for the first time the permanent recording and reproduction of sound, especially the human voice. On December 6, 1877, Edison put tinfoil around the cylinder, turned the handle of the shaft and, shouting into one of the diaphragms, recorded a…
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This outboard motor, designed and built by Ole Evinrude (1877-1934) at the Evinrude Motor Company in Milwaukee, Wisconsin, was quickly accepted by the boating public of the United States. Bess Evinrude called the prototype a "coffee grinder," but it moved a boat through water better than the huge… Read More
Designed and built by Fred Graue, a German immigrant, together with William Asche, the Old Graue Mill began operating around 1852 and served the village of Brush Hill (Hinsdale) until World War I. Its undershot waterwheel, wooden gearing system, belt power transmission, bucket elevators, and… Read More
The first practical demonstration of this tractor took place in a peat field on Roberts Island on November 24, 1904, and was patented and in production by December of 1907. The existing machine represents the earliest gasoline-powered track-type tractors that were to help revolutionize…
Read More
This facility was typical of others in the country that made small spherical lead shot for the fowling pieces of frontier settlers. Smelted lead from the nearby Austinville mines was melted at the top of the tower and poured through a sizing sieve to produce small droplets. Surface tension caused… Read More
The Charles River Basin was one of the pioneering environmental engineering projects in America. The project transformed 675 acres of unhealthy and unsightly salt marshes and tidal flats were into an environmental centerpiece for the Boston area by 1910. This was one of the first public projects…
Read More
The increased light-grasp of this telescope made possible many notable advances in structural cosmology between 1924 and 1930, which have revised our ideas about the universe. One of these advances was that spiral nebulae are galactic units like our own; another was the idea of an expanding… Read More
This was one of the first power facilities to demonstrate the feasibility of long distance electric power transmission. Through an elaborate switchboard at the main station, tied to similar boards at substations, a complete circuit was created to drive an electric motor 153 miles from the…
Read More