Engineering Innovations

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Castillo de San Marcos

St. Augustine, FL

This is a unique link between medieval European military engineering and modern American civil engineering. It is the oldest (1695) major engineered structure in the United States.
Cedar Falls Water Supply

Seattle, WA

The forerunner of the public power movement, this was the first municipally owned hydroelectric project in the United States.
Center Pivot Irrigator

Minden, NE

The center pivot irrigator has become the most widely used method of sprinkler irrigation and transformed agricultural production throughout the world.
Central Pacific Railroad

Ogden, UT

America's first transcontinental railroad began in Sacramento in 1863, and was completed in 1869 at Promontory, Utah. The railroad was organized and located over the Sierra...
Central Yacht Basin

St Petersburg, FL

The St. Petersburg Yacht Basin was the original operating location of the St. Petersburg – Tampa Airboat Line, the nation’s first, regularly-scheduled commercial airline.
CERN Experimental Instrumentation

Geneva, Meyrin

At CERN laboratories the invention of multiple-wire proportional chambers and drift chambers revolutionized the domain of electronic particle detectors, leading to new research on...
Chain of Rocks Water Purification Plant

St. Louis, MO

A civil engineer and a chemist cooperated in the spring of 1904 in a process of chemical coagulation to purify the highly turbid water of the Mississippi. This pioneering effort...
Chandler Chemistry Laboratory

Bethlehem, PA

The Chandler Chemistry Lab, built between 1884 and 1885, set the standard for laboratory construction for the next half century.
Chandler Chemistry Laboratory at Lehigh University

Bethlehem, PA

Chapin Mine Pump

Iron Mountain, MI

Late 19th-century steeple compound-condensing engine and one of the largest at the time.
Charles River Basin Project

Boston, MA

In 1910, this environmental engineering project converted 675 acres of estuarial muck into a freshwater basin of beauty and recreational value.
Charleston - Hamburg Railroad

Charleston, SC

At the time of its construction in 1833, the Charleston-Hamburg Railroad was the world's longest railroad. Designed and constructed by Horatio Allen, it was the first...
Charlestown Naval Dry Dock

Charlestown, MA

Built between 1827 and 1833 the Charlestown Naval Dry Dock, Boston, Massachusetts and the Gosport Naval Dry Dock, Norfolk, Virginia are two of the earliest major structures of...
Cheesman Dam

Sedalia, CO

When completed in 1905, the Cheesman Dam was the world's highest gravity stone arch masonry dam. It was the first major dam in the United States to incorporate the gravity...
Chesapeake and Delaware Canal

New Castle, DE

While only 14 miles long, this canal was one of the most expensive canals ever built in America.
Chesbroughs Water Supply System

Chicago, IL

Chestnut Street Pumping Engine

Erie, PA

Average US municipal steam water-pumping engine of the late 1800s and early 1900s.
Chicago Burlington & Quincy Railroad Roundhouse

Aurora, IL

Innovative railroad yard machine shop for first railroad linking Chicago and the Mississippi River.
Childs-Irving Hydroelectric Project

Phoenix, AZ

Early 20th-century hydroelectric plant incorporating innovative technologies
Chivilingo Hydroelectric Plant


The Chivilingo Hydroelectric Power Plant was the first in Chile and only the second in South America.