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Historic Civil Engineering Landmarks Historical Markers

More than 200 markers sponsored by the American Society of Civil Engineer recognizing historically significant local, national, and international civil engineering projects, structures, and sites.
 
An additional nearby Aqueduct of Querétaro marker image, Touch for more information
By J. Makali Bruton, November 11, 2016
An additional nearby Aqueduct of Querétaro marker
Mexico, Querétaro (Municipality of Querétaro), Santiago de Querétaro — The Aqueduct of Querétaro
Reynando las Españas el Catolico Don Felipe V. que Dios guarde y siendo virrey de ésta Nueva España el Exmo. Marqués de Casa Fuerte, se empezó esta magnífica obra en la alberca el día 26 de diciembre de 1726 y se concluyó el día de octubre de 1735, . . . — Map (db m100261) HM
Arizona (Coconino County), Marble Canyon — Navajo Bridge
There are three markers on this end of the Navajo Bridge. (Marker on left:) National Historical Civil Engineering Landmark American Society of Engineers 1852 Designated by the American Society of Civil Engineers . . . — Map (db m94887) HM
California (Alameda County), Sunol — Sunol Water Temple
[Main Marker:] California Historic Civil Engineering Landmark Alameda Creek Water System 1888 San Francisco Section A802 1975 [Second Marker:] Restoration of the Sunol Water Temple Started May 27, 1997 . . . — Map (db m24499) HM
California (Kern County), Tehachapi — 508 — Tehachapi Loop
From this spot may be seen a portion of the world-renowned “Loop.” It was completed in 1876 under the direction of William Hood, Southern Pacific Railroad Engineer. In gaining elevation around central hill of loop a 4000 foot train will . . . — Map (db m134430) HM
California (Kern County), Tehachapi — Tehachapi Pass Railroad LineConstructed 1874 – 1876 — Commemorated October 1998 —
In front of you is the world famous Tehachapi Loop which is about halfway upgrade to the Tehachapi Pass. This steep line averages 2.2% in gradient in its 28 miles of length. This feat of civil engineering genius was crowning achievement of civil . . . — Map (db m134431) HM
California (Los Angeles County), Gorman — The “Ridge Route”California Historic Civil Engineering Landmark — Constructed 1914-1915 —
In front of you in the hills, high above freeway Interstate 5, is a portion of the historic 1915 two-lane “Ridge Route". The power lines follow it.

The original Ridge Route was constructed in 1914-1915 by pick, shovel and mule drawn Fresno . . . — Map (db m119542) HM

California (Los Angeles County), Sylmar — 653 — The Cascades
On November 5, 1913, 40,000 people gathered here to witness the dedication of the Los Angeles - Owens River Aqueduct. The terminus of a 233-mile long engineering marvel, the Cascades were the site of William Mulholland‘s famous speech: “There . . . — Map (db m137887) HM
California (Los Angeles County), Torrance — Pacific Electric RailwayEl Prado Bridge
Constructed in 1913, this bridge was a part of the Pacific Electric Railway system which was designated as a Local Historic Civil Engineering Landmark by the American Society of Civil Engineers, Los Angeles section, in 1973. Although the bridge no . . . — Map (db m140110) HM
California (Marin County), Sausalito — The Golden Gate Bridge
The Golden Gate Bridge is a structure of striking form and elegance. Built in 1937, it remains an indispensable link in the Bay Area's transportation network and a historical monument of civil engineering and construction. The bridge was named for . . . — Map (db m102433) HM
California (Mono County), Lee Vining — The Tioga Pass RoadConstructed 1883 & 1910 - Commemorated 2002
Tioga Pass at 9945 feet is the highest automobile pass in California. The road to the pass was constructed in two parts. The first part was a wagon road, 56 miles long, going from Crane Flat on the west side to a silver mine on the east slope of the . . . — Map (db m49970) HM
California (Santa Barbara County), Santa Barbara — Santa Barbara Mission Early Water SupplyHistoric Civil Engineering Landmark
The original water supply for the Santa Barbara Mission is an outstanding example of an early water system in Southern California. It was constructed by the Native Americans under the direction of the Franciscan Padres. Constructed in . . . — Map (db m147954) HM
Colorado (Montezuma County), Cortez — Prehistoric Mesa Verde Reservoirs
National Historic Civil Engineering Landmark [American Society of Civil Engineering 1852 Logo] Prehistoric Mesa Verde Reservoirs Mesa Verde's industrious Ancestral Puebloans designed, constructed, and maintained Morefield, . . . — Map (db m58965) HM
Colorado (Montezuma County), Mesa Verde National Park — Far View Reservoir
Imagine this mesa top in A.D. 1150 with fields of corn, beans, and squash; supplemented with wild plants such as amaranth, tubers, and sunflowers. Children could be seen watering corn with clay water jars (ollas), and young men could be seen cutting . . . — Map (db m71901) HM
Delaware (New Castle County), Delaware City — Delaware Historic Civil Engineering Landmark
Chesapeake & Delaware Canal Designated 1982, Delaware Section, ASCE — Map (db m10204) HM
Florida (St. Johns County), St. Augustine — Castillo de San MarcosNational Historic Civil Engineering Landmark
National Historic Civil Engineering Landmark American Society of Civil Engineers 1852 Castillo de San Marcos ASCE 1976Map (db m127741) HM
Georgia (Chatham County), Savannah — City Plan of Savannah
National Historic Civil Engineering Landmark City Plan of Savannah               Presented 1978 — Map (db m67944) HM
Idaho (Kootenai County), Coeur d'Alene — The Mullan RoadMullan Road Historical Site
Between 1859 and 1862 the U.S. Army built a military wagon road between Fort Benton Montana, and Fort Walla Walla, Washington. This National Historic Civil Engineering Landmark was the first major engineered highway in the Pacific Northwest. — Map (db m122863) HM
Illinois (Cook County), Chicago — Monument of the Millennium
[Text on the right] The ASCE presented only ten such awards worldwide, each representing the most outstanding example of Civil engineering in a particular area of infrastructure over the past century.

Created in 1889, the District built . . . — Map (db m47658) HM

Indiana (Franklin County), Metamora — Duck Creek Aqueduct
An aqueduct is a bridge carrying one body of water over another. The Duck Creek Aqueduct was originally built in 1843 to convey the canal over Duck Creek 16 feet below. Flood waters in 1847 destroyed the aqueduct, which was soon replaced by the . . . — Map (db m55560) HM
Louisiana (Caddo Parish), Shreveport — McNeill St. Pump StationHistoric Site — Shreveport —
Built 1887 as city's first waterworks. Contains original equipment in working order. Only example of its sort remaining in the United States of America, according to Smithsonian Institution. Declared a National Landmark in 1982. — Map (db m140206) HM
Louisiana (Jefferson Parish), Elmwood — Huey P. Long Bridge, LouisianaNational Historic Civil Engineering Landmark
This structure is a combination railroad and highway bridge. Designed by the firm of Modjeski, Masters and Chase, with foundation recommendations by Dr. Karl Terzaghi. It was the first bridge to span the Mississippi River at New Orleans. The . . . — Map (db m125232) HM
Louisiana (St. Tammany Parish), Mandeville — Lake Pontchartrain Causeway BridgeNational Historic Civil Engineering Landmark
The original 23.86 mile-long structure, which now carries the Southbound traffic, was designed by the firm of Palmer & Baker. When opened in 1956, the structure was the longest bridge in the world by more than 15 miles. In building the bridge, which . . . — Map (db m99805) HM
Maine (Cumberland County), Harpswell — Bailey Island Bridge
Plaque 1 National Historic Civil Engineering Landmark Bailey Island Bridge Harpswell, Maine Presented 1984

Plaque 2 This 1150 ft. bridge is an exceptional engineering solution to meet unusual conditions and is the only one . . . — Map (db m108111) HM

Maine (Cumberland County), Naples — Songo Lock
This lock, originally built of stone masonry in 1830, was a vital link in the 50 mile long waterway from Portland Harbor to Harrison at the head of Long Lake until the advent of the railroad in 1869. At one time 100 “canal boats” were . . . — Map (db m59436) HM
Maine (Cumberland County), Portland — Portland Observatory
has been designated a National Historic Landmark This site possesses national significance in commemorating the history of the United States of America. The Observatory is the nation's only remaining maritime signal tower. It served as . . . — Map (db m50418) HM
Maryland (Baltimore County), Relay — The Thomas Viaduct
Front Commenced, July 4th, 1833. Finished, July 4th, 1835. Rear Johnathan Knight, Chief Engineer Caspar W. Wever, Superintendent of Construction. Designed by Benjamin H. Latrobe. . . . — Map (db m127) HM
Maryland (Howard County), Savage — Bollman Iron Truss Bridge1869
Spanning the Little Patuxent River is the sole surviving example of the bridging system invented, 1850, by Wendel Bollman, Baltimore engineer. It was the first system, entirely of iron, used by the Baltimore and Ohio railroad and the first in . . . — Map (db m123610) HM
Maryland (Montgomery County), Cabin John — Cabin John
[ Panel 1] “... in our midst exists one of the most imposing and wonderful structures which engineering skill could devise ...” --William T.S. Curtis, November 1, 1897, from a paper read before the Columbia Historical Society. . . . — Map (db m22636) HM
Maryland (Montgomery County), Cabin John — Cabin John Bridge / Cabin John Aqueduct
[Left plaque:] An American Water Landmark Cabin John Bridge Significant in the history of Public Water Supply Designated by American Water Works Association [Right plaque:] . . . — Map (db m145965) HM
Massachusetts (Norfolk County), Canton — Canton Viaduct
Constructed in 1835 National Register of Historic Places Placed by Canton Historical Commission Dedicated July 4th 1993 National Historic Civil Engineering Landmark Designated by the American society of Civil Engineers Dedicated in . . . — Map (db m52387) HM
Massachusetts (Norfolk County), Quincy — The Granite Railway
National Historic Civil Engineering Landmark. The Granite Railway Designated by the American Society of Civil Engineers 1976 This marker commemorates the 150th anniversary of the ground breaking for the first commercial railroad in the . . . — Map (db m49466) HM
Massachusetts (Plymouth County), Brockton — Brockton Railroad Viaducts and BridgesMassachusetts Historic Civil Engineering Landmark

Completed 1895 • Dedicated 1986 — Map (db m118210) HM

Massachusetts (Suffolk County), Boston — Dry Dock 1Boston Nat’l Hist Pk — Charlestown Navy Yard —
This stone and metal structure is Dry Dock 1, completed in 1833. As one of America’s first two granite dry docks, Dry Dock 1 made the repair of large naval ships faster, easier, and safer. Returning warships to sea duty in less time was a crucial . . . — Map (db m37697) HM
Michigan (Allegan County), Allegan — S549A — The Second Street Bridge
This simply ornamented wrought-iron bridge was built in 1886. It replaced an earlier wooden one that had begun to fall into disrepair. Designed by the King Iron Bridge and Manufacturing Company of Cleveland, Ohio, the double-intersection Pratt truss . . . — Map (db m69901) HM
Minnesota (Hennepin County), Minneapolis — Stone Arch Bridge
"This viaduct...is the only one of its kind that spans the Father of Waters, and is one of the largest and most noteworthy in the United States. Firmer than the earth which supports it, it is constructed to stand the test of time." . . . — Map (db m27042) HM
Minnesota (Hennepin County), Minneapolis — The Stone Arch Bridge — Saint Anthony Falls Heritage Trail —
In 1879 St. Paul railroad magnate James J. Hill opened his "Manitoba line" to the Canadian border, linking the wheat fields of the Red River Valley with the flour mills of Minneapolis. To improve railroad access at the falls he built this 2,100-foot . . . — Map (db m21031) HM
Missouri (St. Louis), Downtown West — Union Station
has been designated a National Historic Landmark This site possesses national significance in commemorating the history of the United States of America ——————— [Markers on interior . . . — Map (db m62210) HM
Missouri (St. Louis), Forest Park — River Des Peres Sewage and Drainage Works
[Top plaque:] The River Des Peres Sewage and Drainage Works extends 14 miles from the city limits northwest to Delmar and Skinker to the Mississippi River south of the city. Four miles of massive, enclosed reinforced concrete sewers . . . — Map (db m141182) HM
Montana (Chouteau County), Fort Benton — Mullan Wagon Road
Captain John Mullan started surveying the Mullen Road in 1853 and began construction in 1859 of the 624-mile wagon road that linked Fort Benton to the head of navigation on the Columbia. Indian wars slowed him somewhat, but Mullan opened his route . . . — Map (db m142246) HM
Nevada (Clark County), Boulder City — Civil Engineering Monument of the MillenniumHoover Dam
One of the finest examples of how civil engineering ingenuity shaped the development of society's quality of life in the 20th century. — Map (db m31900) HM
Nevada (Clark County), Boulder City — Hoover Dam
A modern civil engineering wonder of the United States One of seven selected by the American Society of Civil Engineers 1955 — Map (db m13436) HM
New Jersey (Passaic County), Paterson — Great Falls Raceway and Power SystemNational Historic Civil and Mechanical Engineering Landmark
Alexander Hamilton, with great vision, prompted the incorporation of the "society for establishing usefull [sic] manufactures" in 1791 to start America's economic and industrial independence. Pierre Charles L'Enfant, engineer and planner of the . . . — Map (db m64189) HM
New Jersey (Sussex County), Stanhope — National Historic Civil Engineering Landmark
The hydraulic – powered inclined plane system of the Morris Canal. Presented 1980 — Map (db m99035) HM
New York (Dutchess County), Poughkeepsie — Poughkeepsie-Highland BridgeNational Historic Civil Engineering Landmark
The Poughkeepsie-Highland Bridge is the oldest surviving steel cantilever bridge in the world, and when built, had the longest truss and cantilever spans. The bridge provided the first, and only, all-rail route across the Husdon River south of . . . — Map (db m35483) HM
New York (Monroe County), Rochester — National Historic Civil Engineering LandmarkErie Canal
National Historic Civil Engineering Landmark The Erie Canal Begun at Rome, N.Y., July 4, 1817 - Completed 1825 Benjamin Wright (1770-1842) Chief Engineer ASCE 1967 — Map (db m63996) HM
New York (New York County), New York — Holland TunnelNational Historic Civil And Mechanical Engineering Landmark — Constructed 1920-1927 —
The first long mechanically ventilated underwater tunnel in the world designed for motor vehicle use The 29.5 ft. diameter 3,500 ft. long twin tubes of this tunnel were shield driven by the pneumatic method through extremely difficult river . . . — Map (db m145029) HM
New York (Niagara County), Niagara Falls — Bridges of NiagaraInternational Historic Civil Engineering Landmark
Since 1848 many bridges have spanned the Niagara Gorge below Niagara Falls. The design and construction of these bridges was necessary for the economic development of the Niagara Falls area. The demand for safe and convenient crossings was easily . . . — Map (db m72386) HM
New York (Orange County), West Point — National Historic Civil Engineering LandmarkU. S. Military Academy
The oldest extant institution in the United States to offer formal academic instruction in the field of civil engineering (Sept. 1813). — Map (db m35349) HM
New York (Saratoga County), Waterford — Flight of Five Locks
National Historic Civil Engineering Landmark American Society of Civil Engineers 1852 Flight of Five Locks - New York State Barge Canal The Greatest Series of High Lift Locks In The Shortest Distance Of Any Canal In The United . . . — Map (db m58539) HM
New York (Saratoga County), Waterford — Waterford BridgesNational Historic Civil Engineering Landmark
National Historic Civil Engineering Landmark Waterford Bridges Waterford, New York The Union Bridge, the first to cross the lower Hudson River was built in 1804 at this site by Theodore Burr and lasted for 105 years until it was . . . — Map (db m70365) HM
New York (Schoharie County), North Blenheim — Old Blenheim Bridge
Erected 1854 - 1855 by Nicholas Montgomery Powers Famous bridge builder Born Pittsford, Vermont, August 30, 1817 Died Clarendon, Vermont, 1897 This bridge, 232 feet in length, the longest covered single-span wooden bridge in the . . . — Map (db m46983) HM
Ohio (Montgomery County), Vandalia — The Miami Conservancy District
The Miami Conservancy District is a public corporation established following the passage of the Conservancy Act of Ohio in 1914. After the 1913 flood inundated the Miami Valley, local citizens were determined to avoid such a disaster in the . . . — Map (db m95581) HM
Ohio (Morgan County), Rokeby Lock — Muskingum River Navigation SystemNational Historic Civil Engineering Landmark
The Muskingum River Improvement, started in 1837, played a key role in economic development of the Greater Ohio River Valley as one of the nation's first complete slackwater navigation systems for steam-powered vessels, and survives as the most . . . — Map (db m13382) HM
Ohio (Summit County), Akron — 29-77 — Airdock
A colossus of engineering acumen and structural steel, the Airdock was built in 1929 as the construction facility for the U.S. Navy's rigid airships, the USS Akron (1931) and USS Macon (1933). The airships, or dirigibles, served as . . . — Map (db m43475) HM
Oregon (Curry County), Gold Beach — Patterson BridgeRogue River Bridge
Patterson Bridge (Rogue River Bridge) Completed January 21, 1932 and dedicated In Memory to the Governor of Oregon Isaac Lee Patterson (1926-died in office 1929) 1932.... The bridge was considered the most advanced concrete . . . — Map (db m113391) HM
Pennsylvania (Blair County), Altoona — Horseshoe CurveNational Historic Engineering Landmark
Designed and built under the direction [of] Pennsylvania Railroad chief engineer and, later, company president, J. Edgar Thomson. Horseshoe Curve opened February 15, 1854. It was 366 meters across and 1310 meters long with a 1.8 percent grade. . . . — Map (db m52488) HM
Pennsylvania (Cambria County), Allegheny Portage Railroad National Historic Site — Allegheny Portage Railroad
National Historic Civil Engineering Landmark — Map (db m53793) HM
Pennsylvania (Lebanon County), Lebanon — Union Canal Tunnel
Designated a National Historic Civil Engineering Landmark in 1970, this tunnel is the oldest existing transportation tunnel in the United States. At the time of its construction it was considered a work almost unknown in this country.

Dug . . . — Map (db m84218) HM

Pennsylvania (McKean County), Mount Jewett — Kinzua Viaduct
Originally begun in 1881 for the New York, Lake Erie & Western Railroad to ship coal, lumber, and oil, it was once the world’s highest and longest rail viaduct. Rebuilt in 1900 to carry heavier loads, it was in service until 1959. Kinzua Bridge . . . — Map (db m51329) HM
Pennsylvania (Northampton County), Bethlehem — Waterworks1762
“They have a Sett of Pumps which go by Water, which force the water up through leaden Pipes, from the River to the Top of the Hill, near an hundred feet.” John Adams to Abigail Adams 1777 A bountiful spring supplied . . . — Map (db m27191) HM
Pennsylvania (Philadelphia County), Philadelphia — Philadelphia City HallNational Historic Civil Engineering Landmark
National Historic Civil Engineering Landmark Since its completion 30 years after construction began in 1871, City Hall has dominated the center city Philadelphia skyline. At Penn Square, the building is still the world’s tallest masonry load . . . — Map (db m107585) HM
Pennsylvania (Philadelphia County), Philadelphia — The City Plan of Philadelphia
Planned 1682 National Historic Civil Engineering Landmark The City Plan of Philadelphia Surveyor General Thomas Holme, Governor William Penn & others Planned the open Public Squares and Rational Street Layout that we enjoy today. These . . . — Map (db m50982) HM
Pennsylvania (Wyoming County), Nicholson — Tunkhannock ViaductAKA Nicholson Bridge — National Historic Civil Engineering Landmark —

Tunkhannock Viaduct 1912 — Built — 1915 by The Delaware, Lackawanna and Western Railroad Company

W. H. Truesdale — President G. J. Ray — Chief Engineer Flickwir & Bush — Contractors

Length 2375 . . . — Map (db m102847) HM

South Dakota (Brule County), Chamberlain — Missouri River Bridges of South DakotaNational Historic Civil Engineering Landmark
Completed 1927 Commemorated 1995 — Map (db m101386) HM
Tennessee (Davidson County), Nashville — 3A 34 — Tennessee State Capitol
Designed by William Strickland, noted Philadelphia architect who also designed the tower of Independence Hall. Construction was commenced in 1845 and completed 1859. Strickland died in 1854 and is entombed in the north portico. His son Francis, . . . — Map (db m36112) HM
Texas (Bexar County), San Antonio — San Antonio's River Walk and Flood Control System
National Historic Civil Engineering Landmark — Map (db m30924) HM
Texas (Galveston County), Galveston — Galveston Seawall and Grade RaisingNational Historic Civil Engineering Landmark — American Society of Civil Engineers 1852 —
Following the hurricane of 1900, the greatest natural disaster of U.S. history, with the loss of 6,000 lives, civil engineers designed and built a concrete seawall and raised the elevation of Galveston Island, using pioneering materials and methods, . . . — Map (db m90439) HM
Texas (Panola County), Carthage — International Boundary MarkerRepublic of Texas-United States — Historic Civil Engineering Landmark —
Historic Civil Engineering Landmark International Boundary Marker Republic of Texas-United States (Set April 23, 1841) Designated by the Texas and Louisiana SectionsMap (db m105272) HM
Utah (Washington County), Springdale — Zion Mt. Carmel Tunnel and Highway, UtahNational Historic Civil Engineering Landmark
This 5,613- foot-long tunnel, the longest vehicular tunnel in the National Park System, was blasted through the towering sandstone cliffs above Pine Creek Canyon. Construction required extraordinary access through cliff-face galleries for blasting . . . — Map (db m74632) HM
Virginia (Fairfax County), Great Falls — Great Falls Canal and Locks
National Historic Civil Engineering Landmark Great Falls Canal and Locks Constructed 1785-1802. Operated until 1821 ——— These works were the major feature of the first river navigation system for trade with the west. This . . . — Map (db m4975) HM
Virginia, Portsmouth — Norfolk Naval Shipyard“Dry Dock 1” — Path of History Portsmouth, VA —
Convinced of the need to more quickly and efficiently repair the nation's Navy ships, President John Quincy Adams and Congress agreed in 1827 to follow engineers' recommendations to build two dry docks, one here and one in Boston. The . . . — Map (db m76838) HM
West Virginia (Berkeley County), Martinsburg — Baltimore and Ohio Railroad Shop Complex
The roundhouse is the sole surviving cast-iron framed roundhouse and is an important example of mid-19th century industrial building design. Designed by Albert Fink, in collaboration with Benjamin H. Latrobe, it represents an early use of . . . — Map (db m1199) HM
West Virginia (Berkeley County), Martinsburg — Baltimore and Ohio Roundhouse and Shop Complex
National Civil Engineering Landmark. The re-construction of the Baltimore and Ohio Railroad Roundhouse and Shop Complex commenced soon after the end of the American Civil War in 1865. This complex included two roundhouses and two significant . . . — Map (db m17373) HM

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