List of Historic Civil Engineering Landmarks

The following is a list of Historic Civil Engineering Landmarks as designated by the American Society of Civil Engineers since it began the program in 1964. The designation is granted to projects, structures, and sites in the United States (National Historic Civil Engineering Landmarks) and the rest of the world (International Historic Civil Engineering Landmarks).

As of 2024, there are 235 designated Historic Civil Engineering Landmarks in the United States and 61 internationally, totaling 296 landmarks worldwide.^[1] Sections or chapters of the American Society of Civil Engineers may also designate state or local landmarks within their areas; those landmarks are not listed here.

Ref#	Year designated	Name	Image	Built	Location Coordinates	Region/state	Country	Category
1	1966	Bollman Truss Bridge		1869	Savage 39°8′5.4″N 76°49′30.3″W	Maryland	United States	bridges
2	1967	Bidwell Bar Bridge		1856	Oroville 39°32′14.8″N 121°27′15.6″W	California	United States	bridges
3	1967	Erie Canal		1825	Hudson River to Lake Erie 43°2′35.6″N 76°1′20.2″W	New York	United States	water transportation
4	1967	Middlesex Canal		1803	Middlesex County 42°30′21.4″N 71°9′25.8″W	Massachusetts	United States	water transportation
5	1968	Central Pacific Railroad		1863–1869	Sacramento eastward 38°34′57″N 121°30′22.8″W	California	United States	roads & rails
6	1968	Durango-Silverton Branch of the D&RGW RR		1882	Durango 37°35′27.7″N 107°46′41.6″W	Colorado	United States	roads & rails
7	1968	Ellicott's Stone		1799	Mobile 30°59′52″N 88°1′21.1″W	Alabama	United States	surveys & maps
8	1968	Acequias of San Antonio		1718	San Antonio 29°19′57.1″N 98°27′41.1″W	Texas	United States	water supply & control
9	1968	Joining of the Rails - Transcontinental Railroad		1869	Promontory 41°37′4.7″N 112°33′5.8″W	Utah	United States	roads & rails
10	1968	Wheeling Suspension Bridge		1849	Wheeling 40°4′12.8″N 80°43′36.7″W	West Virginia	United States	bridges
11	1969	Alvord Lake Bridge		1889	San Francisco 37°46′8.4″N 122°27′17.6″W	California	United States	bridges
12	1969	Charleston - Hamburg Railroad		1833	Charleston to Hamburg 32°47′22.9″N 79°56′15.8″W	South Carolina	United States	roads & rails
13	1970	Ascutney Mill Dam		1834	Windsor 43°28′35″N 72°23′44.5″W	Vermont	United States	dams
14	1970	Bridgeport Covered Bridge		1862	Nevada County 39°17′34.2″N 121°11′41.7″W	California	United States	bridges
15	1970	Cornish–Windsor Covered Bridge		1866, rebuilt 1988	Windsor to Cornish 43°28′25.3″N 72°23′2.1″W	Vermont and New Hampshire	United States	bridges
16	1970	Frankford Avenue Bridge		1697	Philadelphia 40°2′36.7″N 75°1′14″W	Pennsylvania	United States	bridges
17	1970	Potowmack Canal and Locks		1799	Great Falls 38°59′25.3″N 77°14′58.1″W	Virginia	United States	water transportation
18	1970	Theodore Roosevelt Dam & Salt River Project		1911	33°40′17.9″N 111°9′40.8″W	Arizona	United States	water supply & control
19	1970	Union Canal Tunnel		1828	Lebanon 40°20′58.5″N 76°27′41″W	Pennsylvania	United States	water transportation
20	1971	Bethlehem Waterworks		1761	Bethlehem 40°37′8.7″N 75°22′58.2″W	Pennsylvania	United States	water supply & control
21	1971	Druid Lake Dam		1871	Baltimore 39°19′7″N 76°37′53″W	Maryland	United States	dams
22	1971	Eads Bridge		1874	St. Louis 38°37′44″N 90°10′43.3″W	Missouri	United States	bridges
23	1971	First Owens River - Los Angeles Aqueduct		1913	Owens Valley 36°58′32.4″N 118°12′38″W	California	United States	water supply & control
24	1971	Mormon Tabernacle		1867	Salt Lake City 40°46′13.6″N 111°53′35.3″W	Utah	United States	buildings
25	1972	Cabin John Aqueduct		1863	Cabin John 38°58′22″N 77°8′54.9″W	Maryland	United States	water supply & control
26	1972	Chesbroughs Water Supply System Chicago		1869	Chicago 41°53′49.8″N 87°37′27.9″W	Illinois	United States	water supply & control
27	1972	Brooklyn Bridge		1883	New York City 40°42′22″N 73°59′48.8″W	New York	United States	bridges
28	1972	Gunnison Tunnel		1909	Montrose 38°29′36″N 107°43′17″W	Colorado	United States	tunnels
29	1972	Roebling's Delaware Aqueduct of the Delaware & Hudson Canal		1848, restored 1983	Lackawaxen to Minisink Ford 41°28′57.5″N 74°59′4.1″W	Pennsylvania & New York	United States	water transportation
30	1972	Miami Conservancy District		1922	near Dayton 39°45′49.2″N 84°11′29.2″W	Ohio	United States	water supply & control
31	1973	Buffalo Bill Dam		1910	Cody 44°30′5.3″N 109°10′59.4″W	Wyoming	United States	dams
32	1973	Cheesman Reservoir		1905	Southwest of Denver 39°12′27″N 105°16′20.1″W	Colorado	United States	dams
33	1973	Embudo Stream Gauging Station		1889	Embudo 36°12′18.4″N 105°57′49.2″W	New Mexico	United States	water supply & control
34	1973	Ingalls Building		1903	Cincinnati 39°6′1″N 84°30′45.1″W	Ohio	United States	buildings
35	1973	Pelton Impulse Water Wheel		1878	Camptonville 39°27′7″N 121°2′55″W	California	United States	power generation
36	1973	Starrucca Viaduct		1848	Lanesboro 41°57′51.3″N 75°35′0.6″W	Pennsylvania	United States	bridges
37	1974	Kansas City Park and Boulevard System		1893 to 1915	Kansas City 39°4′57″N 94°33′18″W	Missouri	United States	surveys & maps
38	1974	Milwaukee Metropolitan Sewage Treatment Plant, home of Milorganite[2]		1919	Milwaukee 43°1′21.3″N 87°53′57.3″W	Wisconsin	United States	water supply & control
39	1974	Philadelphia Municipal Water Supply		1801	Philadelphia 39°57′56″N 75°10′51″W	Pennsylvania	United States	water supply & control
40	1974	Stone Arch Bridge		1883	Minneapolis 44°58′50.8″N 93°15′12.3″W	Minnesota	United States	bridges
41	1975	Castillo de San Marcos		1695	St. Augustine 29°53′52″N 81°18′41″W	Florida	United States	buildings
42	1975	Croton Water Supply System		1842	New York City 41°0′42.5″N 73°52′36.4″W	New York	United States	water supply & control
43	1975	Folsom Hydroelectric Power System		1895	Folsom 38°40′46.6″N 121°10′37.2″W	California	United States	power generation
44	1975	Granite Railway		1826	Quincy 42°14′44.6″N 71°2′9″W	Massachusetts	United States	roads & rails
45	1975	Hoosac Tunnel		1875	Berkshire County 42°40′31.1″N 73°2′45.1″W	Massachusetts	United States	tunnels
46	1975	Lawrence Experiment Station		1886	Lawrence 42°41′53.8″N 71°9′55.7″W	Massachusetts	United States	research & educational
47	1975	Marlette Lake Water System		1873 to 1887	Virginia City 39°13′9.5″N 119°47′20.1″W	Nevada	United States	water supply & control
48	1975	Mount Washington Cog Railway		1869	Mount Washington 44°16′26″N 71°19′55″W	New Hampshire	United States	roads & rails
49	1975	Smithfield Street Bridge		1883	Pittsburgh 40°26′5.4″N 80°0′7.7″W	Pennsylvania	United States	bridges
50	1975	Tunkhannock Viaduct		1915	Nicholson 41°37′34.2″N 75°46′34.4″W	Pennsylvania	United States	bridges
51	1976	Crozet's Blue Ridge Tunnel		1858	Waynesboro 38°2′3.1″N 78°51′28.4″W	Virginia	United States	tunnels
52	1976	Cumbres and Toltec Scenic Railroad		1880	Chama to Antonito 36°59′42″N 106°17′51.1″W	New Mexico and Colorado	United States	roads & rails
53	1976	Elephant Butte Dam		1916	Truth or Consequences 33°9′14.9″N 107°11′31.3″W	New Mexico	United States	dams
54	1976	First Concrete Pavement		1893	Bellefontaine 40°21′37.5″N 83°45′33.6″W	Ohio	United States	roads & rails
55	1976	International Boundary Marker No. 1[3]		1855	Doña Ana County 31°47′2″N 106°31′47.1″W	New Mexico	United States	surveys & maps
56	1976	King's Road		1766 to 1775	New Smyrna 29°38′23.4″N 81°16′50.3″W	Florida	United States	roads & rails
57	1976	National Road		1811–1839	Cumberland to Vandalia 39°57′38.7″N 82°27′2″W	Maryland to Illinois	United States	roads & rails
58	1977	Charlestown Naval Dry Dock		1833	Boston 42°22′23.7″N 71°3′19.3″W	Massachusetts	United States	water transportation
59	1977	City Plan of Savannah		1733	Savannah 32°4′32″N 81°5′31″W	Georgia	United States	surveys & maps
60	1977	Great Falls Raceway and Power System		1800	Paterson 40°54′55.1″N 74°10′52.1″W	New Jersey	United States	power generation
61	1977	First New York Subway		1904	New York City 40°42′45.3″N 74°0′24.2″W	New York	United States	roads & rails
62	1977	Mason–Dixon line		1767	39°43′16.1″N 80°7′5.3″W	Maryland & Pennsylvania	United States	surveys & maps
63	1977	Minot's Ledge Lighthouse		1860	off Scituate 42°16′11″N 70°45′32.9″W	Massachusetts	United States	water transportation
64	1977	Mullan Road		1862	Walla Walla 46°46′8.3″N 118°12′22.6″W	Washington	United States	roads & rails
65	1977	Dry Dock No 1 Norfolk Naval Shipyard		1833	Portsmouth 36°49′14″N 76°17′35″W	Virginia	United States	water transportation
66	1977	Reversal of the Chicago River		1900	Chicago 41°42′18″N 87°56′2″W	Illinois	United States	water transportation
67	1977	Vulcan Street Plant		1882	Appleton 44°15′29.2″N 88°23′50.2″W	Wisconsin	United States	power generation
68	1977	William E. Ward House		1876	Rye Brook 41°1′32.5″N 73°40′3.1″W	New York	United States	buildings
69	1978	Boston Subway		1897	Boston 42°21′23.8″N 71°3′43.6″W	Massachusetts	United States	roads & rails
70	1978	Dunlap's Creek Bridge		1839	Brownsville 40°1′17.2″N 79°53′17.2″W	Pennsylvania	United States	bridges
71	1978	Hudson and Manhattan Railroad Tunnel		1908	Jersey City to New York City 40°43′56.7″N 74°1′11.6″W	New Jersey & New York	United States	tunnels
72	1978	Newark International Airport		1928	Newark 40°41′22.2″N 74°10′28.2″W	New Jersey	United States	aviation
73	1978	United States Military Academy		1813	West Point 41°23′34.8″N 73°57′28.8″W	New York	United States	research & educational
74	1979	Cleveland Hopkins Airport		1925	Cleveland 41°24′45″N 81°50′53″W	Ohio	United States	aviation
75	1979	Fink Deck Truss Bridge		1870	Lynchburg 37°26′24.3″N 79°9′56″W	Virginia	United States	bridges
76	1979	Fink Through Truss Bridge		1858	Hamden 40°36′14.3″N 74°54′8.1″W	New Jersey	United States	bridges
77	1979	Iron Bridge		1779	Ironbridge 52°37′38.4″N 2°29′7.6″W	West Midlands	England	bridges
78	1979	Moffat Tunnel		1928	Winter Park 39°53′37.5″N 105°42′41.3″W	Colorado	United States	tunnels
79	1979	Rockville Bridge		1902	Harrisburg 40°19′59.9″N 76°54′38.8″W	Pennsylvania	United States	bridges
80	1980	Goodyear Airdock		1929	Akron 41°1′54.9″N 81°28′14.6″W	Ohio	United States	aviation
81	1980	Hydraulic-Inclined Plane System of the Morris Canal		1831	Waterloo Village 40°54′55.2″N 74°21′23.8″W	New Jersey	United States	water transportation
82	1981	Borden Base Line		1831	Hatfield 42°25′33.7″N 72°37′9″W	Massachusetts	United States	surveys & maps
83	1981	Chain of Rocks Water Purification Plant		1904	St. Louis 38°45′18.5″N 90°11′11.6″W	Missouri	United States	water supply & control
84	1981	Charles River Basin Project		1910	Boston 42°22′3.8″N 71°4′12.8″W	Massachusetts	United States	water supply & control
85	1981	Cortland Street Drawbridge		1902	Chicago 41°55′1.1″N 87°39′51.4″W	Illinois	United States	bridges
86	1981	George Washington Bridge		1931	Fort Lee to New York City 40°51′6.1″N 73°57′9.7″W	New Jersey & New York	United States	bridges
87	1981	Louisville Water Works		1875 to 1896	Louisville 38°16′50″N 85°42′4.3″W	Kentucky	United States	water supply & control
88	1981	Montgomery Bell's Tunnel		1818	Cheatham County 36°8′48.5″N 87°7′19.3″W	Tennessee	United States	tunnels
89	1981	Snoqualmie Falls Cavity Generating Station		1899	Snoqualmie 47°32′39.5″N 121°50′29.3″W	Washington	United States	power generation
90	1981	Union Station		1894	St. Louis 38°37′41.2″N 90°12′28.8″W	Missouri	United States	roads & rails
91	1981	Washington Monument		1885	Washington 38°53′22.1″N 77°2′6.9″W	District of Columbia	United States	buildings
92	1981	Whipple Truss Bridge		1855	Schenectady 42°49′5.2″N 73°55′27″W	New York	United States	bridges
93	1982	Carrollton Viaduct		1829	Baltimore 39°16′31.5″N 76°39′18″W	Maryland	United States	bridges
94	1982	Detroit-Windsor Tunnel		1930	Detroit 42°19′28″N 83°2′25.4″W	Michigan	United States	tunnels
95	1982	Eads South Pass Navigation Works		1879	Port Eads 28°59′50″N 89°8′38″W	Louisiana	United States	water transportation
96	1982	Holland Tunnel		1927	Jersey City to New York City 40°43′38.9″N 74°1′16″W	New Jersey & New York	United States	tunnels
97	1982	John A. Roebling Suspension Bridge		1866	Cincinnati 39°5′34.8″N 84°30′35.6″W	Ohio	United States	bridges
98	1982	Kinzua Railway Viaduct		1882	McKean County 41°45′47.3″N 78°35′21.1″W	Pennsylvania	United States	bridges
99	1982	Rogue River Bridge		1931	Gold Beach 42°25′40.5″N 124°24′47.5″W	Oregon	United States	bridges
100	1982	Second Street Bridge		1886	Allegan 42°31′32.7″N 85°50′54.6″W	Michigan	United States	bridges
101	1982	Watertown Arsenal		1859	Watertown 42°21′44″N 71°9′58″W	Massachusetts	United States	research & educational
102	1983	Atlantic City Convention Hall		1929	Atlantic City 39°21′18″N 74°26′19.1″W	New Jersey	United States	buildings
103	1983	Bailey Island Bridge		1928	Harpswell 43°44′57.1″N 69°59′19.3″W	Maine	United States	bridges
104	1983	Blenheim Bridge		1855	North Blenheim 42°28′18.4″N 74°26′29.4″W	New York	United States	bridges
105	1983	Iron Building of the U.S. Army Arsenal		1859	Watervliet 42°43′5.9″N 73°42′14.5″W	New York	United States	buildings
106	1983	Ohio Canal System		1848	Akron 40°52′39.2″N 81°35′1.4″W	Ohio	United States	water transportation
107	1983	Peavey–Haglin Experimental Concrete Grain Elevator		1900	St. Louis Park 44°56′32.7″N 93°20′42.8″W	Minnesota	United States	buildings
108	1983	Sault Ste. Marie Hydroelectric Complex		1902	Sault Ste. Marie 46°29′50.8″N 84°19′55.7″W	Michigan	United States	power generation
109	1983	Zuiderzee Enclosure Dam		1927 to 1932	Zaandam 52°59′37.5″N 5°9′19.1″E	North Holland	Netherlands	water supply & control
110	1984	Columbia River Scenic Highway		1922	Portland 45°39′19.3″N 121°54′13.2″W	Oregon	United States	roads & rails
111	1984	Columbia-Wrightsville Bridge		1930	Columbia 40°1′42.4″N 76°31′5.6″W	Pennsylvania	United States	bridges
112	1984	Golden Gate Bridge		1937	San Francisco 37°49′11.7″N 122°28′42.7″W	California	United States	bridges
113	1984	Hoover Dam		1935	Boulder City 36°0′57.7″N 114°44′14.8″W	Nevada & Arizona	United States	dams
114	1984	Lowell Waterpower System		1821	Lowell 42°38′48.5″N 71°18′41.6″W	Massachusetts	United States	power generation
115	1984	Panama Canal		1914	Colón to Panama City9°7′2.2″N 79°43′7.6″W		Panama	water transportation
116	1984	Rocky River Pumped Storage Hydro-Plant		1925	New Milford 41°34′49.7″N 73°26′13.2″W	Connecticut	United States	power generation
117	1985	Bayonne Bridge		1931	Bayonne to Staten Island 40°38′29.8″N 74°8′31.6″W	New Jersey & New York	United States	bridges
118	1985	Beginning Point of the U.S. Public Land Survey		1785	Liverpool 40°38′19.7″N 80°31′8.4″W	Ohio	United States	surveys & maps
119	1985	Cape Cod Canal		1914	Barnstable County 41°45′51.1″N 70°34′6.3″W	Massachusetts	United States	water transportation
120	1985	Chesapeake and Delaware Canal		1828 (rebuilt 1927)	New Castle 39°32′34″N 75°43′14″W	Delaware	United States	water transportation
121	1985	Davis Island Lock and Dam		1885	Pittsburgh 40°29′35″N 80°3′56″W	Pennsylvania	United States	water transportation
122	1985	Forth Railway Bridge		1890	North Queensferry to South Queensferry 56°0′1.5″N 3°23′19.4″W		Scotland	bridges
123	1985	Going-to-the-Sun Road		1932	Glacier National Park 48°41′42″N 113°49′1.2″W	Montana	United States	roads & rails
124	1985	High Bridge		1877	Jessamine & Mercer Counties 37°49′1.7″N 84°43′12.4″W	Kentucky	United States	bridges
125	1985	Statue of Liberty		1886	New York Harbor 40°41′21.5″N 74°2′40.4″W	New York[4]	United States	buildings
126	1986	White River Concrete Arch Bridge		1930	Cotter 36°16′2″N 92°32′39″W	Arkansas	United States	bridges
127	1986	Cranetown Triangulation Site		1817	Cedar Grove 40°49′43.9″N 74°13′27.1″W	New Jersey	United States	surveys & maps
128	1986	Eiffel Tower		1889	Paris 48°51′30.2″N 2°17′40.2″E	Île-de-France	France	buildings
129	1986	El Camino Real		1598–1800s	Santa Fe and Mexico City 34°3′38.7″N 106°53′36.6″W	New Mexico	United States and Mexico	roads & rails
130	1986	El Camino Real (The Royal Road) Eastern Branch		from 16th century	San Antonio 29°26′45.8″N 98°30′12.3″W	Texas	United States	roads & rails
131	1986	New Castle Ice Harbor		1803	New Castle 39°39′28″N 75°33′39″W	Delaware	United States	water transportation
132	1986	Norris Dam		1936	Knoxville 36°13′28″N 84°5′31.5″W	Tennessee	United States	dams
133	1986	San Francisco–Oakland Bay Bridge		1937	San Francisco to Oakland 37°47′53.6″N 122°22′40.7″W	California	United States	bridges
134	1986	Sewall's Bridge		1761 (rebuilt 1934)	York 43°8′10.2″N 70°39′38.3″W	Maine	United States	bridges
135	1986	Triborough Bridge Project		1936	New York City 40°47′26.6″N 73°55′33.2″W	New York	United States	bridges
136	1986	U.S. Army Corps of Engineers Waterways Exp. Station		1929	Vicksburg 32°18′4.2″N 90°52′18″W	Mississippi	United States	research & educational
137	1986	U.S. Capitol		1793, rebuilt 1863	Washington 38°53′23″N 77°0′33″W	District of Columbia	United States	buildings
138	1987	Allegheny Portage Railroad		1834	Hollidaysburg 40°27′23″N 78°33′3.4″W	Pennsylvania	United States	roads & rails
139	1987	Bonneville Dam, Columbia River System		1937	Bonneville 45°38′39.7″N 121°56′26.7″W	Oregon	United States	power generation
140	1987	Bridges of Keeseville		1843, 1878, 1888	Keeseville 44°30′13.2″N 73°28′57.3″W	New York	United States	bridges
141	1987	Dismal Swamp Canal		1805	Chesapeake to South Mills 36°35′34.1″N 76°23′5.4″W	Virginia to North Carolina	United States	water transportation
142	1987	Houston Ship Channel		1837–present	Houston 29°44′35.8″N 95°6′16.5″W	Texas	United States	water transportation
143	1987	Kamehameha V Post Office		1871	Honolulu 21°18′34.6″N 157°51′47.4″W	Hawaii	United States	buildings
144	1987	Frisco Bridge		1892	Memphis 35°7′43.6″N 90°4′34.7″W	Tennessee & Arkansas	United States	bridges
145	1987	Quebec Bridge		1917	Quebec City 46°44′45.6″N 71°17′17.3″W	Quebec	Canada	bridges
146	1988	Belle Fourche Dam		1911	Belle Fourche 44°43′51.3″N 103°40′36.8″W	South Dakota	United States	dams
147	1988	École Nationale des Ponts et Chaussées		1747	Paris 48°51′20.9″N 2°19′49.9″E	Île-de-France	France	research & educational
148	1988	Keokuk Hydro-Power System		1913	Keokuk 40°23′56.6″N 91°21′49″W	Iowa	United States	power generation
149	1988	Portion of the Pennsylvania Turnpike between the Irwin Interchange and Carlsie Interchange		1940/11964/1968	40°1′49.9″N 78°29′33.6″W	Pennsylvania	United States	roads & rails
150	1988	River des Peres Sewerage & Drainage Works		1924 to 1931	St. Louis 38°39′42.3″N 90°18′33.9″W	Missouri	United States	water supply & control
151	1988	Sydney Harbour Bridge		1932	Sydney 33°51′8.1″S 151°12′38.6″E	New South Wales	Australia	bridges
152	1989	Royal Colonial Boundary of 1665		1728–1819	Middlesboro 36°36′2.9″N 83°40′31.5″W	Kentucky	United States	surveys & maps
153	1989	Zhaozhou Bridge		605 AD	Zhaoxian 37°43′12.9″N 114°45′47.7″E	Hebei	China	bridges
154	1990	Fort Peck Dam		1940	Fort Peck 48°0′10.1″N 106°24′58″W	Montana	United States	dams
155	1990	Maria Pia Bridge		1877	Oporto 41°8′23.4″N 8°35′49.6″W	Norte	Portugal	bridges
156	1990	Salginatobel Bridge		1930	Grisons 46°58′54.4″N 9°43′5.1″E	Graubünden	Switzerland	bridges
157	1991	Eddystone Lighthouse		1882	off Plymouth 50°11′2″N 4°16′5.1″W		England	water transportation
158	1991	Fritz Engineering Laboratory		1910	Bethlehem 40°36′28.9″N 75°22′34.3″W	Pennsylvania	United States	research & educational
159	1991	St. Clair Tunnel		1891	Port Huron 42°57′32.4″N 82°25′22.2″W	Michigan	United States	tunnels
160	1991	Thames Tunnel		1843	London 51°30′12.7″N 0°3′13.3″W		England	tunnels
161	1992	Acquedotto Traiano-Paolo		110 AD	Rome 42°3′12.9″N 12°20′18.7″E	Lazio	Italy	water supply & control
162	1992	Bridges of Niagara		1849, 1855, 1883, 1898, 1941	Niagara Gorge 43°5′24.8″N 79°4′3.4″W	Ontario and New York	Canada and United States	bridges
163	1992	Duck Creek Aqueduct		1846	Metamora 39°26′46.1″N 85°7′48″W	Indiana	United States	water supply & control
164	1992	Hohokam Canal System		600 – 1450 AD	Maricopa County 33°26′43.8″N 111°48′56.2″W	Arizona	United States	water supply & control
165	1992	San Jacinto Monument		1939	Houston 29°44′59.5″N 95°4′50.6″W	Texas	United States	buildings
166	1993	Blimp Hangars		1942	Tustin 33°42′10.8″N 117°49′26.3″W	California	United States	aviation
167	1993	Denison Dam		1943	Denison 33°49′52.6″N 96°34′16″W	Texas & Oklahoma	United States	dams
168	1993	Hanford B Reactor		1944	Richland 46°37′49.1″N 119°38′50.3″W	Washington	United States	power generation
169	1993	Stevens Pass Railroad Tunnels & Switchback System		1900	Stevens Pass 47°44′52.4″N 121°7′26.3″W	Washington	United States	tunnels
170	1994	Colorado River Aqueduct		1933–1941	Blythe 34°17′23.6″N 114°10′19.5″W	California	United States	water supply & control
171	1994	Kavanagh Building		1936	Buenos Aires 34°35′43.7″S 58°22′28.9″W		Argentina	buildings
172	1994	Missouri River Bridges		1926	Chamberlain 43°48′42.1″N 99°20′16.1″W	South Dakota	United States	bridges
173	1995	Red Hill Underground Fuel Storage Facility		1943	Honolulu 21°22′18″N 157°53′44″W	Hawaii	United States	tunnels
174	1994	Viaducto del Malleco		1890	Malleco River 37°57′47″S 72°26′20″W	Central Chile	Chile	bridges
175	1994	White Pass and Yukon Route		1900	Whitehorse, Yukon to Skagway, Alaska 59°37′28″N 135°8′18.3″W	Yukon Territory to Alaska	Canada & United States	roads & rails
176	1995	Alaska Highway		1942	Dawson Creek to Delta Junction 59°54′39.6″N 131°33′20.6″W	British Columbia to Alaska	Canada & United States	roads & rails
177	1995	Banaue Rice Terraces		100 BC	Banaue 16°55′57.4″N 121°3′30.1″E	Ifugao	Philippines	water supply & control
178	1995	Acueducto de Queretaro		1738	Querétaro 20°35′48″N 100°22′20.6″W		Mexico	water supply & control
179	1995	Victoria Falls Bridge		1905	Zambezi River 17°55′41.7″S 25°51′26.1″E		Zimbabwe & Zambia	bridges
180	1996	Armour-Swift-Burlington Bridge		1912	Kansas City 39°7′0″N 94°34′47.5″W	Missouri	United States	bridges
181	1996	Dublin-Belfast railway line		1839	Dublin to Belfast 53°43′0″N 6°20′15″W		Ireland & Northern Ireland	roads & rails
182	1996	Kentucky Dam		1944	Gilbertsville 37°0′46.4″N 88°16′10.1″W	Kentucky	United States	dams
183	1996	Lake Moeris Quarry Road		2575–2137 BC	Lake Moeris 29°37′24.2″N 30°38′40.4″E		Egypt	roads & rails
184	1996	City Plan of Philadelphia		1682	Philadelphia 39°57′28.6″N 75°10′14.2″W	Pennsylvania	United States	surveys & maps
185	1996	San Antonio River Walk & Flood Control System		1929 to 1941	San Antonio 29°25′30.7″N 98°29′29.7″W	Texas	United States	water control & supply
186	1997	Grand Coulee Dam		1941	Grand Coulee 47°57′23.8″N 118°58′51.6″W	Washington	United States	dams
187	1997	Lake Washington Ship Canal & Hiram M. Chittenden Locks		1917	Seattle 47°39′55.7″N 122°23′49.6″W	Washington	United States	water transportation
188	1997	Navajo Bridge		1929	Page 36°49′3.4″N 111°37′52.3″W	Arizona	United States	bridges
189	1997	North Island Main Trunk Railway		1885–1908	Auckland to Wellington 39°13′39.8″S 175°23′55.5″E	North Island	New Zealand	roads & rails
190	1997	Northampton Street Bridge		1896	Easton to Phillipsburg 40°41′29.3″N 75°12′14.4″W	Pennsylvania & New Jersey	United States	bridges
191	1997	Snowy Mountains Scheme		1974	Snowy Mountains 35°36′40.1″S 148°17′29.8″E	New South Wales	Australia	power generation
192	1997	Texas Commerce Bank Building (formerly Gulf, now Chase)		1929	Houston 29°45′32″N 95°21′49.7″W	Texas	United States	buildings
193	1997	Walnut Street Bridge		1890	Harrisburg 40°15′27.1″N 76°53′9.8″W	Pennsylvania	United States	bridges
194	1998	Brooks AFB, Old Hangar 9		1918	San Antonio 29°20′38.5″N 98°26′38.9″W	Texas	United States	aviation
195	1998	Canton Viaduct		1835	Canton 42°9′28.8″N 71°9′14.5″W	Massachusetts	United States	bridges
196	1998	Göta Canal		1810 to 1832	Gothenburg 58°29′53.9″N 16°10′28.9″E	Västra Götaland	Sweden	water transportation
197	1998	Moseley Wrought Iron Arch Bridge		1864	North Andover 42°40′8.6″N 71°7′21.3″W	Massachusetts	United States	bridges
198	1998	Tehachapi Pass Railroad Line		1876	Kern County 35°12′3″N 118°32′13″W	California	United States	roads & rails
199	1999	Acueducto de Segovia		50 AD	Segovia 40°56′52.7″N 4°7′4.3″W	Castile and León	Spain	water supply & control
200	1999	Arroyo Seco Parkway		1940	Los Angeles 34°4′23″N 118°14′2″W	California	United States	roads & rails
201	1999	Blue Ridge Parkway		begun 1935	Shenandoah NP to Great Smokey Mountains NP 36°26′28.5″N 81°5′42.9″W	Virginia to North Carolina	United States	roads & rails
202	1999	Cape Hatteras Lighthouse		1870	Cape Hatteras 35°15′2″N 75°31′43.7″W	North Carolina	United States	water transportation
203	1999	Maine Turnpike		1947	43°21′17.2″N 70°35′26.2″W	Maine	United States	roads & rails
204	1999	McNeill Street Pumping Station		1887	Shreveport 32°31′3.8″N 93°45′25.9″W	Louisiana	United States	water supply & control
205	2000	Cedar Falls Hydroelectric Project		1901	Seattle 47°25′9.2″N 121°46′54.4″W	Washington	United States	power generation
206	2000	Forth and Clyde Canal and Union Canal		1790	55°56′18″N 4°9′18.8″W		Scotland	water transportation
207	2000	Hagia Sophia		537 AD	Istanbul 41°0′31.2″N 28°58′48.6″E	Istanbul	Turkey	buildings
208	2000	Muskingum River Navigation System		1837	Zanesville 39°43′59.5″N 81°54′29.4″W	Ohio	United States	water transportation
209	2000	Seventh Street Improvement Arches		1909	St. Paul 44°57′23″N 93°4′38″W	Minnesota	United States	bridges
210	2000	West Baden Springs Hotel		1902	West Baden Springs 38°34′1.3″N 86°37′6.6″W	Indiana	United States	buildings
211	2001	Bunker Hill Covered Bridge		1895, rebuilt 1994	Claremont 35°43′17.5″N 81°6′54.8″W	North Carolina	United States	bridges
212	2001	Galveston Seawall and Grade Raising		1904 (expanded through 1963)	Galveston 29°18′9″N 94°46′27″W	Texas	United States	water supply & control
213	2001	Baltimore & Ohio Roundhouse & Shop Complex		1842 to 1850s	Martinsburg 39°27′33″N 77°57′36″W	West Virginia	United States	buildings
214	2002	Conwy Suspension Bridge		1826	Conwy 53°16′49.7″N 3°49′25.6″W	Conwy	Wales	bridges
215	2002	Conwy Tubular Bridge		1849	Conwy 53°16′49″N 3°49′25″W	Conwy	Wales	bridges
216	2002	Dorton Arena		1952	Raleigh 35°47′38.4″N 78°42′37.3″W	North Carolina	United States	buildings
217	2002	East Maui Irrigation System		1876 to 1923	East Maui 20°52′0″N 156°13′0″W	Hawaii	United States	water supply & control
218	2002	Five Stone Arch Bridges		1830 to 1866	Hillsborough 43°7′49″N 71°56′41.1″W	New Hampshire	United States	bridges
219	2002	Louisville and Portland Canal Locks & Dam		1830, rebuilt 1962	Louisville 38°16′18.5″N 85°46′45.6″W	Kentucky	United States	water transportation
220	2002	Marshall Building		1906	Milwaukee 43°2′0.9″N 87°54′31.2″W	Wisconsin	United States	buildings
221	2002	Menai Suspension Bridge		1826	Anglesey 53°13′13.1″N 4°9′48.1″W		Wales	bridges
222	2002	Old Cape Henry Light,		1792, replaced 1881	Virginia Beach 36°55′32.8″N 76°0′29.3″W	Virginia	United States	water transportation
223	2002	Portland Head Light		1787	Cape Elizabeth 43°37′23.2″N 70°12′28.4″W	Maine	United States	water transportation
224	2002	Shannon Hydroelectric Scheme		1929	52°42′20″N 8°36′46″W		Ireland	power generation
225	2002	Waldo-Hancock Suspension Bridge		1931	Bucksport 44°33′37.6″N 68°48′5.9″W	Maine	United States	bridges
226	2003	Horseshoe Curve		1854	Altoona 40°29′54″N 78°29′9.1″W	Pennsylvania	United States	roads & rails
227	2003	Suez Canal		1869	Port Said to Suez 30°42′18″N 32°20′39″E		Egypt	water transportation
228	2003	Tennessee State Capitol		1845 to 1877	Nashville 36°9′57.1″N 86°47′3.4″W	Tennessee	United States	buildings
229	2004	Hwaseong Fortress		1796	Suwon 37°17′0″N 127°0′57.6″E	Gyeonggi-do	Republic of Korea	buildings
230	2004	Mesa Verde Reservoirs		750 to 1180 AD	Montezuma County 37°14′26.3″N 108°30′16.7″W	Colorado	United States	water supply & control
231	2004	Northern Pacific High Line Bridge No 64		1908	Valley City 46°56′18.9″N 97°59′26.9″W	North Dakota	United States	bridges
232	2004	Old Wisla Bridge			Tczew 54°5′33.7″N 18°48′22.2″E	Vistula River	Poland	bridges
233	2005	Great Western Railway		1838	51°37′16.2″N 1°21′26.8″W		England & Wales	roads & rails
234	2005	Philadelphia City Hall		1901	Philadelphia 39°57′10.1″N 75°9′48.8″W	Pennsylvania	United States	buildings
235	2005	Sweetwater Dam		1888	Spring Valley 32°41′29.8″N 117°0′29.2″W	California	United States	dams
236	2005	Stanley Hydraulics Laboratory at the University of Iowa		established 1919	Iowa City 41°39′25.8″N 91°32′29″W	Iowa	United States	research & educational
237	2006	Machu Picchu		1460 AD	13°9′48″S 72°32′44″W		Peru	urban development
238	2006	Portland Observatory		1807	Portland 43°39′55.4″N 70°14′53.7″W	Maine	United States	water transportation
239	2006	Tipon		1200 – 1534 AD	13°34′15″S 71°46′59″W		Peru	water supply & control
240	2007	Caledonian Canal		1822	Great Glen 57°6′44.9″N 4°44′18.8″W		Scotland	water transportation
241	2007	Craigellachie Bridge Moray		1814	Strathspey 57°29′28.8″N 3°11′38″W		Scotland	bridges
242	2008	Choate Bridge		1764	Ipswich 42°40′46.1″N 70°50′13.6″W	Massachusetts	United States	bridges
243	2008	Goldfields Water Supply		1903	Kalgoorlie 31°57′36″S 116°10′16.7″E	Western Australia	Australia	water supply & control
244	2008	Lacey V. Murrow Bridge and Mount Baker Ridge Tunnels		1940	King County 47°35′23.2″N 122°16′44.3″W	Washington	United States	bridges
245	2008	Woodhead Dam		1897	Cape Town 33°58′38.2″S 18°24′7.9″E	Western Cape	South Africa	dams
246	2009	Guayabo Ceremonial Center		300 BC - AD 1400	Turrialba 9°58′21.7″N 83°41′26.6″W	Turrialba	Costa Rica	civil engineering profession
247	2009	Vancouver's Mapping of the West Coast of North America		1791–1795	45°0′0″N 124°0′43″W		Canada, Mexico and United States	surveys & maps
248	2009	Poughkeepsie-Highland Bridge		1886–1888	Poughkeepsie 41°42′38.5″N 73°56′41.1″W	New York	United States	bridges
249	2009	Manhattan Bridge		1909	New York City 40°42′27″N 73°59′26.9″W	New York	United States	bridges
250	2009	Queensboro Bridge		1909	New York City 40°45′24.2″N 73°57′15.1″W	New York	United States	bridges
251	2009	Williamsburg Bridge		1903	New York City 40°42′49.2″N 73°58′20.5″W	New York	United States	bridges
252	2010	Mackinac Bridge		1958	Straits of Mackinac 45°48′48.8″N 84°43′42″W	Michigan	United States	bridges
253	2010	Rensselaer Polytechnic Institute		1824	Troy 42°43′48″N 73°40′39″W	New York	United States	research & educational
254	2010	Thomas Viaduct Railroad Bridge[5]		1835	Elkridge and Relay 39°13′17.5″N 76°42′48.1″W	Maryland	United States	bridges
255	2011	Utica Memorial Auditorium		1959	Utica 43°6′17.9″N 75°14′0.5″W	New York	United States	buildings
256	2011	Tacoma Narrows Bridges[6]		1940–1950	Tacoma 47°16′8″N 122°33′3″W	Washington	United States	bridges
257	2011	Flight of Five Locks		1915	Waterford 42°48′2.8″N 73°41′29.1″W	New York	United States	water transportation
258	2011	Petra		309 BC	30°19′43″N 35°26′31″E	Ma'an Governorate	Jordan	buildings
259	2012	Zion-Mount Carmel Tunnel and Highway		1930	Zion National Park 37°12′40.7″N 112°57′29.6″W	Utah	United States	roads & rails
260	2012	Huey P. Long Bridge		1935	Jefferson Parish 29°56′38.8″N 90°10′7.6″W	Louisiana	United States	bridges
261	2012	Grand Central Terminal		1913	New York City 40°45′10.3″N 73°58′37.9″W	New York	United States	roads & rails
262	2013	Titan Clydebank crane		1907	Clydebank 55°53′50.5″N 4°24′31.2″W	West Dunbartonshire	Scotland	buildings
263	2013	Waterford Bridges		1909	Troy and Waterford 42°47′19.3″N 73°40′25.8″W	New York	United States	bridges
264	2013	Lake Pontchartrain Causeway		1956	Lake Pontchartrain 30°11′59.2″N 90°7′21.7″W	Louisiana	United States	bridges
265	2014	The Dalles Dam		1957	Columbia River 45°36′50.3″N 121°8′3″W	Oregon & Washington	United States	dams
266	2015	Gladesville Bridge		1964	Sydney 33°50′31.3″S 151°8′51.8″E	New South Wales	Australia	bridges
267	2016	Cape Agulhas Lighthouse		1848	L'Agulhas 34°49′45.7″S 20°0′32.4″E		South Africa	water transportation
268	2016	Arrowrock Dam		1912	Boise and Elmore 43°35′43″N 115°55′21.1″W	Idaho	United States	dams
269	2016	All-American Canal[7]		1940	Imperial County 32°52′59″N 114°27′54″W	California	United States	water supply & control
270	2016	Canal du Midi[8]		1681	Toulouse to Étang de Thau 43°12′52.9″N 2°25′49.8″E	Occitania	France	water transportation
271	2016	Liverpool and Manchester Railway[9]		1830	Liverpool to Manchester 53°27′10.8″N 2°36′58.6″W	North West England	England	roads & rails
272	2017	Bonnet Carré Spillway		1931	St. Charles Parish 30°0′7.2″N 90°26′23.3″W	Louisiana	United States	dams
273	2017	Duluth Aerial Ferry/Lift Bridge[10]		1905	Duluth 46°46′45.8″N 92°5′35.3″W	Minnesota	United States	bridges
274	2017	Mississippi River Basin Model[11]		1966	Jackson 32°18′21.8″N 90°19′8.2″W	Mississippi	United States	research & educational
275	2017	Chaffey Brothers Irrigation Works[12]		1887	Mildura and Renmark 34°15′1.6″S 142°13′28.8″E	Victoria and South Australia	Australia	water supply & control
276	2017	Qhapaq Ñan: The Great Inka Road System[13]		1000 BC - 1533 AD	13°13′0.3″S 72°23′5.2″W		Colombia to Chile	roads & rails
277	2017	Tunnel of Eupalinos[14]		520 BC	Samos 37°41′40.6″N 26°55′48″E	North Aegean	Greece	tunnels
278	2018	Augusta Canal and Industrial District		1845	Augusta 33°31′17.6″N 82°0′38.9″W	Georgia	United States	power generation
279	2018	Old River Station[15]		1907	Cincinnati 39°4′17″N 84°25′40″W	Ohio	United States	water supply & control
280	2018	Boundary Layer Wind Tunnel Laboratory[16]		1965	London 43°0′14″N 81°16′32.5″W	Ontario	Canada	research & educational
281	2018	Institution of Civil Engineers[17]		1818	London 51°30′4″N 0°7′44.4″W		England	research & educational
282	2018	Union Chain Bridge[18]		1820	Horncliffe to Fishwick 55°45′9.3″N 2°6′24.4″W		England to Scotland	bridges
283	2019	Kaibab Trail Suspension Bridge[19]		1928	Grand Canyon 36°6′53.2″N 112°5′21.1″W	Arizona	United States	bridges
284	2019	Union Pacific Railroad[20]		1868	Omaha westward 41°15′0.9″N 95°55′37.4″W	Nebraska	United States	roads & rails
285	2019	Silver Bridge Collapse - Creation of National Inspection Standards[21]		1967	Point Pleasant 38°50′42″N 82°8′28″W	West Virginia	United States	bridges
286	2020	NASA Vehicle Assembly Building[22]		1966	Titusville 28°35′11″N 80°39′5″W	Florida	United States	buildings
287	2021	Main Avenue Bridge[23]		1939	Cleveland 41°29′55.2″N 81°42′18.5″W	Ohio	United States	bridges
288	2021	Sydney Opera House[12]		1973	Sydney 33°51′24″S 151°12′55″E	New South Wales	Australia	buildings
289	2022	David Thompson's Surveying and Mapping of the Northwest of North America[24]		1814			Canada & United States	surveys & maps
290	2022	Portage Lake Bridge[25]		1959	Hancock and Houghton 47°7′25.9″N 88°34′26.7″W	Michigan	United States	bridges
291	2022	Salmon Creek Dam[26]		1914	Juneau 58°20′30″N 134°24′12″W	Alaska	United States	dams
292	2023	New Orleans Drainage System[27]		1900	New Orleans 29°59′12″N 90°7′28″W	Louisiana	United States	water supply & control
293	2023	Crystal Springs Dam[28]		1890	San Mateo County 37°31′43″N 122°21′44″W	California	United States	dams
294	2024	Morris Dam[29]		1934	Azusa 34°10′29″N 117°52′52″W	California	United States	dams

See also

• List of Historic Mechanical Engineering Landmarks