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1981

Whipple Truss Bridge
Society: ASCE Main Category: Civil Sub Category: Bridges Era: 1850-1859 DateCreated: 1855 Schenectady State: NY Zip: Country: USA Website: http://www.asce.org/Project/Whipple-Truss-Bridge/ Creator: Whipple, Squire

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.

YearAdded:
1981
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
Washington Monument
Society: ASCE Main Category: Civil Sub Category: Buildings Era: 1880-1889 DateCreated: 1885 101-199 15th St SW
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:
1981
Image Credit: Courtesy Flickr/Sebastien Fuss (CC BY-SA 2.0) Image Caption: Washington Monument Era_date_from: 1885
Union Station
Society: ASCE Main Category: Civil Sub Category: Buildings Era: 1890-1899 DateCreated: 1894 1820 Market Street
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:
1981
Image Credit: Courtesy Flickr/Ron Reiring (CC BY 2.0) Image Caption: Union Station Era_date_from: 1894
Borden Base Line
Society: ASCE Main Category: Civil Sub Category: Boundaries & Surveys Era: 1830-1839 DateCreated: 1831 South Deerfield State: MA Zip: Country: USA Website: http://www.asce.org/Project/Borden-Base-Line/ Creator: Paine, Robert Treat , Borden, Simeon

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:
1981
Image Credit: Public Domain (Copyright Exp.) Image Caption: An 1871 map of Massachusetts highlighting the Borden Base Line Era_date_from: 1831
Snoqualmie Falls Cavity Generating Station
Society: ASCE Main Category: Civil Sub Category: Power Generation Era: 1890-1899 DateCreated: 1899 Base of Falls Snoqualmie State: WA Zip: 98024 Country: USA Website: http://www.asce.org/Project/Snoqualmie-Falls-Cavity-Generating-Station/ Creator: Baker, William

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:
1981
Image Credit: Courtesy Flickr/Allen Sheffield (CC BY 2.0) Image Caption: Snoqualmie Falls Era_date_from: 1899
Society: ASME Main Category: Mechanical Sub Category: Research and Development Era: 1910-1919 DateCreated: 1918 Pasadena State: CA Zip: Country: USA Website: http://www.asme.org/about-asme/history/landmarks/topics-m-z/research-and-development/-66-mount-wilson-observatory,-100-inch-hooker-tele Creator: Pease, Francis G. , Hale, George Ellery
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:
1981
Image Credit: Courtesy Flickr/Bruce Irving (CC BY 2.0) Image Caption: Mount Wilson Observatory, 100-inch Hooker Telescope Era_date_from: 1918
Charles River Basin Project
Society: ASCE Main Category: Civil Sub Category: Water Supply & Control Era: 1910-1919 DateCreated: 1910 Boston State: MA Zip: Country: USA Website: http://www.asce.org/Project/Charles-River-Basin-Project/ Creator: Freeman, John

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:
1981
Image Credit: Courtesy Wikipedia/Daderot (CC BY-SA 3.0) Image Caption: Charles River Basin Project Era_date_from: 1910
Society: ASME Main Category: Mechanical Sub Category: Manufacturing Era: 1800-1829 DateCreated: 1807 New River Trail State Park Austinville State: VA Zip: 24312 Country: USA Website: http://www.asme.org/about-asme/history/landmarks/topics-m-z/manufacturing---1/-63-jackson-ferry-shot-tower-%281807%29 Creator: Jackson, Thomas , Watts, William
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:
1981
Image Credit: Courtesy Wikipedia/Dr00bie (CC BY-SA 3.0) Image Caption: Jackson Ferry Shot Tower Era_date_from: 1807
Holt Caterpillar Tractor
Society: ASME Main Category: Mechanical, Road Sub Category: Agricultural, Road Transportation Era: 1910-1919 DateCreated: 1918 1201 N Pershing Ave Stockton State: CA Zip: 95203 Country: USA Website: http://www.asme.org/about-asme/history/landmarks/topics-m-z/road-and-off-road-transportation/-60-holt-caterpillar-tractor-%281918%29 Creator: Holt, Benjamin

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:
1981
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
Society: ASME Main Category: Mechanical Sub Category: Food Processing Era: 1850-1859 DateCreated: 1852 Salt Creek Oak Brook State: IL Zip: Country: USA Website: http://www.asme.org/about-asme/history/landmarks/topics-a-l/food-processing/-64-graue-mill-%281852%29 Creator: Graue, Friedrich , Asche, William
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:
1981
Image Credit: Public Domain (Historic American Buildings Survey) Image Caption: Graue Mill Era_date_from: 1852
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