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Columbia-Wrightsville Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1930-1939DateCreated: 1930Veterans Memorial BridgeWest HempfieldState: PACountry: USAWebsite: http://www.asce.org/Project/Columbia-Wrightsville-Bridge/Creator: Long, James , Wiley-Maxon Construction Company

The total length of the Columbia-Wrightsville Bridge is 7,374 feet. Its construction required 100,000 cubic yards of concrete and 8 million pounds of steel reinforcing rods.

YearAdded:
1984
Image Credit: Courtesy Flickr/Gerry Dincher (CC BY-SA 2.0)Image Caption: Columbia-Wrightsville BridgeEra_date_from: 1930
Columbia River Scenic Highway
Society: ASCEMain Category: CivilSub Category: Roads & RailsEra: 1920-1929DateCreated: 1922Columbia River HwyCascade LocksState: ORZip: 97014Country: USAWebsite: http://www.asce.org/project/columbia-(old)-river-scenic-highway/Creator: Lancaster, Samuel , Hill, Samuel

A project that combined great engineering ambition and burgeoning civic pride, the Columbia River Highway was built at the dawn of the automobile age out of a desire to bring greater attention to the growing population and natural beauty of the Pacific Northwest. By the time of its completion in the 1920s, the 73.8-mile highway had become a textbook example of modern highway construction and an important commercial and recreational link between Oregon's coastal Willamette Valley and the inland areas of eastern Oregon and Washington. 

YearAdded:
1984
Image Credit: Courtesy Flickr/Doug Kerr (CC BY-SA 2.0)Image Caption: Columbia River Scenic HighwayEra_date_from: 1922
Colorado River Aqueduct
Society: ASCEMain Category: CivilSub Category: Water Supply & ControlEra: 1930-1939DateCreated: 1933-1941Fullerton
Parker Dam
State: CACountry: USAWebsite: http://www.asce.org/Project/Colorado-River-Aqueduct/Creator: Weymouth, Frank E.

Stretching 242 miles from the Colorado River on the California-Arizona border to its final holding reservoir near Riverside, California, the Colorado River Aqueduct consists of more than 90 miles of tunnels, nearly 55 miles of cut-and-cover conduit, almost 30 miles of siphons, and five pumping stations. Supplying approximately 1.2 million acre-feet of water a year - more than a billion gallons a day - it helped make possible the phenomenal growth of Los Angeles, San Diego, and surrounding Southern California areas in the second half of the 20th century. 

YearAdded:
1994
Image Credit: Courtesy Flickr/Chuck Coker (CC BY-ND 2.0)Image Caption: Colorado River Aqueduct sinks into a tunnel underneath California State Highway 62Era_date_from: 1933
Cleveland Hopkins Airport
Society: ASCEMain Category: Aerospace & AviationSub Category: AviationEra: 1920-1929DateCreated: 1925 Hopkins International AirportClevelandState: OHZip: 44135Country: USAWebsite: http://www.asce.org/Project/Cleveland-Hopkins-Airport/Creator: Hopkins, William , Berry, Jack

Constructed on 1,040 acres just 10 miles southwest of the city center, the Cleveland Hopkins Airport was the first major airport in the world to provide an integrated system of paved landing surfaces, lighted runways, and a terminal complex consisting of hangars and operating facilities. Overseen by city manager William Hopkins and Major "Jack" Berry - an engineer on loan from the U.S. postal service who eventually became the city's first Airport Commissioner - the project at first was called "Major Berry's Folly" by local residents because of its outlying location.

YearAdded:
1979
Image Credit: Courtesy Flickr/Ken Lund (CC BY-SA 2.0)Image Caption: Cleveland Hopkins AirportEra_date_from: 1925
Choate Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1750-1799DateCreated: 1764 RiverIpswichState: MAZip: 01938Country: USAWebsite: http://www.asce.org/Project/Choate-Bridge/Creator: Choate, John

The Choate Bridge of Essex County, completed in 1764, is the oldest documented two-span masonry arch bridge in the United States. Named after Colonel John Choate, who supervised the construction, the bridge is located on South Main Street and spans the Ipswich River. Originally, the bridge measured 80 feet 6 inches long and 20 feet 6 inches wide. In 1838 it was widened to 35 feet 6 inches on the east side in order to accommodate another lane of traffic. The west side and the parapet of the bridge, along with the inscription to Colonel Choate, remained unchanged.

YearAdded:
2008
Image Credit: Public Domain (National Park Service)Image Caption: Choate BridgeEra_date_from: 1764
Chesapeake and Delaware Canal
Society: ASCEMain Category: CivilSub Category: Water TransportationEra: 1800-1829DateCreated: 1829Chesapeake and Delaware CanalNew CastleState: DEZip: 19701Country: USAWebsite: http://www.asce.org/project/chesapeake---delaware-canal/Creator: Wright, Benjamin, White, Canvass

The Chesapeake & Delaware Canal is the only canal built in 19th-century America that still operates today as a major shipping route. Connecting the Port of Baltimore and Upper Chesapeake Bay with the mouth of the Delaware River and the Port of Philadelphia, the canal was one of the first civil engineering projects proposed in the New World and one of the most difficult to carry out. Although only 14 miles long, the canal's original cost made it one of the most expensive canals ever built in America.  

YearAdded:
1985
Image Credit: Original Image: Courtesy Flickr/Lee Cannon (CC BY-SA 2.0)Image Caption: Chesapeake and Delaware CanalEra_date_from: 1829
Cheesman Dam
Society: ASCEMain Category: CivilSub Category: DamsEra: 1900-1909DateCreated: 190527633-27701 State Highway 211SedaliaState: COZip: 80135Country: USAWebsite: http://www.asce.org/Project/Cheesman-Dam/Creator: South Platte Canal and Reservoir Company, Allen, C.P.

The Cheesman Dam was the first major dam in the U.S. to incorporate the gravity arch, and upon completion it was the highest gravity arch stone masonry dam in the world. It is the key structure in Denver's water supply.

Three years into original construction, flooding swept away the partially completed rock-filled structure. A solid masonry replacement dam was completed in just five years - a major feat for such a remote and complex project. When it was finished, the dam rose higher than the tallest building in Denver. 

YearAdded:
1973
Image Credit: Public DomainImage Caption: Cheesman DamEra_date_from: 1905
Carrollton Viaduct
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1800-1829DateCreated: 1829Gwynns FallsBaltimoreState: MDCountry: USAWebsite: http://www.asce.org/Project/Carrollton-Viaduct/Creator: Wever, Caspar , Lloyd, James

The Carrollton Viaduct over Gwynn's Falls was the first masonry railroad viaduct constructed in the United States. This structure proved the feasibility of using a viaduct to transport railway vehicles across wide and deep valleys.

YearAdded:
1982
Image Credit: Public Domain (National Park Service)Image Caption: Carrollton ViaductEra_date_from: 1829
Chain of Rocks Water Purification Plant
Society: ASCEMain Category: CivilSub Category: Water Supply & ControlEra: 1900-1909DateCreated: 1903Mississippi RiverSt. LouisState: MOCountry: USAWebsite: http://www.asce.org/Project/Chain-of-Rocks-Water-Purification-Plant/

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 played a major role in reducing the impact of St. Louis' typhoid and cholera epidemic of 1903 that claimed 287 lives. Continued improvements to the plant reduced that number to 91 by 1914. It is estimated that 1,900 lives were likely saved between 1903 and 1915 due to the filtration system.

YearAdded:
1981
Image Credit: Public Domain (Author's Choice)Image Caption: Chain of Rocks Water Purification PlantEra_date_from: 1903
Cedar Falls Water Supply
Society: ASCEMain Category: CivilSub Category: Power GenerationEra: 1900-1909DateCreated: 1905Cedar RiverSeattleState: WACountry: USAWebsite: http://www.asce.org/Project/Cedar-Falls-Water-Supply/

Requests for public power in Seattle began in the late 1890s and lead to the voter approval for building the Cedar Falls Water Supply hydroelectric dam plant in 1902. The first municipally developed and owned hydroelectric plant in the United States began operation in October 1904. The facility is situated one-half mile below Cedar Lake (later known as Chester Morse Lake) near North Bend in King County. 

YearAdded:
2000
Image Credit: Source: http://www.seattle.govImage Caption: Cedar Falls Water SupplyEra_date_from: 1905
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