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Troops Quarters, Boulevard Norzagaray, San Juan, San Juan Municipio, PR

Troops Quarters, Boulevard Norzagaray, San Juan, San Juan Municipio, P...

Significance: The massive fort of San Cristobal, located on the northeast corner of the old walled city of San Juan, was begun around 1633. An important link in the chain of defensive works of the city, it was ... More

Michigan Island Light Station, Keeper's Quarters & Lighthouse, La Pointe, Ashland County, WI

Michigan Island Light Station, Keeper's Quarters & Lighthouse, La Poin...

Unprocessed Field note material exists for this structure: N45 Survey number: HABS WI-317-A

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Municipio, PR

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Munic...

Significance: Casa Blanca was built as a residence and fort for Juan Ponce de Leon and his family, although de Leon died in an expedition to Florida without ever getting to occupy the structure. He was the firs... More

Marshall Space Flight Center, Saturn V S-IC Static Test Facility, West Test Area, Huntsville, Madison County, AL

Marshall Space Flight Center, Saturn V S-IC Static Test Facility, West...

The name of the survey was changed from "Saturn 1-C Static Test Facility" to "Saturn V S-1C Static Test Facility" to more accurately reflect its name. Significance: Engineers used the S-IC Test Stand to help de... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

La Trinidad Counterguard, San Juan, San Juan Municipio, PR

La Trinidad Counterguard, San Juan, San Juan Municipio, PR

Significance: It was built between 1765-83 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan, represents in capsule form the solution to tactical problems presented in the ... More

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Muscle Shoals, Colbert County, AL

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Mu...

Significance: Production of Ammonium Nitrate. / Built as a war measure for the production of ammonium nitrate, a key component in high explosives, U.S.N.P. No. 2 became one of the largest plants of its kind wit... More

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Muscle Shoals, Colbert County, AL

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Mu...

Significance: Production of Ammonium Nitrate. / Built as a war measure for the production of ammonium nitrate, a key component in high explosives, U.S.N.P. No. 2 became one of the largest plants of its kind wit... More

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Muscle Shoals, Colbert County, AL

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Mu...

Significance: Production of Ammonium Nitrate. / Built as a war measure for the production of ammonium nitrate, a key component in high explosives, U.S.N.P. No. 2 became one of the largest plants of its kind wit... More

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Muscle Shoals, Colbert County, AL

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Mu...

Significance: Production of Ammonium Nitrate. / Built as a war measure for the production of ammonium nitrate, a key component in high explosives, U.S.N.P. No. 2 became one of the largest plants of its kind wit... More

Potomac Power Plant, On West Virginia Shore of Potomac River, about 1 mile upriver from confluence with Shenandoah River, Harpers Ferry, Jefferson County, WV

Potomac Power Plant, On West Virginia Shore of Potomac River, about 1 ...

Significance: The Potomac Power Plant was an innovative small hydroelectric facility that operated from 1899 to 1991, originally as part of a wood pulp mill (built 1888), and solely as a power house after a fir... More

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio, PR

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio,...

Significance: It was built 1779-1783 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan. It is a bastion-fort in the outer works of Castillo San Cristobal, a fan-shpaed desi... More

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio, PR

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio,...

Significance: It was built 1779-1783 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan. It is a bastion-fort in the outer works of Castillo San Cristobal, a fan-shpaed desi... More

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio, PR

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio,...

Significance: It was built 1779-1783 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan. It is a bastion-fort in the outer works of Castillo San Cristobal, a fan-shpaed desi... More

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio, PR

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio,...

Significance: It was built 1779-1783 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan. It is a bastion-fort in the outer works of Castillo San Cristobal, a fan-shpaed desi... More

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Significance: The Dry Dock Engine Works is significance, first of all, because of its role in manufacturing and repairing marine steam engines and boilers for Great Lakes freighters and passenger vessels from 1... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

Unprocessed Field note material exists for this structure: FN-8, FN-22, N69 Survey number: HABS MO-1150 Building/structure dates: 1808 Initial Construction National Register of Historic Places NRIS Number: 79003205

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

Unprocessed Field note material exists for this structure: FN-8, FN-22, N69 Survey number: HABS MO-1150 Building/structure dates: 1808 Initial Construction National Register of Historic Places NRIS Number: 79003205

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

Unprocessed Field note material exists for this structure: FN-8, FN-22, N69 Survey number: HABS MO-1150 Building/structure dates: 1808 Initial Construction National Register of Historic Places NRIS Number: 79003205

Castillo de San Felipe del Morro, Lighthouse, Northwest corner of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Lighthouse, Northwest corner of San ...

See also HAER No. PR-23. Survey number: HABS PR-48-A National Register of Historic Places NRIS Number: 66000930

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Municipio, PR

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Munic...

Significance: Casa Blanca was built as a residence and fort for Juan Ponce de Leon and his family, although de Leon died in an expedition to Florida without ever getting to occupy the structure. He was the firs... More

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Municipio, PR

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Munic...

Significance: Casa Blanca was built as a residence and fort for Juan Ponce de Leon and his family, although de Leon died in an expedition to Florida without ever getting to occupy the structure. He was the firs... More

Chisos Basin Store, Castolon, Brewster County, TX

Chisos Basin Store, Castolon, Brewster County, TX

Significance: The Chisos Basin Store, built as a temporary structure in 1941 or early 1942, is constructed of adobe in a vaguely Spanish style, part of a larger complex with this architectural theme. After the... More

Chisos Basin Store, Castolon, Brewster County, TX

Chisos Basin Store, Castolon, Brewster County, TX

Significance: The Chisos Basin Store, built as a temporary structure in 1941 or early 1942, is constructed of adobe in a vaguely Spanish style, part of a larger complex with this architectural theme. After the... More

John C. & Catherine Jackson House, 215 Ruskin Drive, Altoona, Blair County, PA

John C. & Catherine Jackson House, 215 Ruskin Drive, Altoona, Blair Co...

Unprocessed Field note material exists for this structure: FN-311 Survey number: HABS PA-5907 Building/structure dates: ca. 1904- ca. 1906 Initial Construction

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

La Trinidad Counterguard, San Juan, San Juan Municipio, PR

La Trinidad Counterguard, San Juan, San Juan Municipio, PR

Significance: It was built between 1765-83 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan, represents in capsule form the solution to tactical problems presented in the ... More

La Trinidad Counterguard, San Juan, San Juan Municipio, PR

La Trinidad Counterguard, San Juan, San Juan Municipio, PR

Significance: It was built between 1765-83 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan, represents in capsule form the solution to tactical problems presented in the ... More

La Trinidad Counterguard, San Juan, San Juan Municipio, PR

La Trinidad Counterguard, San Juan, San Juan Municipio, PR

Significance: It was built between 1765-83 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan, represents in capsule form the solution to tactical problems presented in the ... More

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Muscle Shoals, Colbert County, AL

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Mu...

Significance: Production of Ammonium Nitrate. / Built as a war measure for the production of ammonium nitrate, a key component in high explosives, U.S.N.P. No. 2 became one of the largest plants of its kind wit... More

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Muscle Shoals, Colbert County, AL

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Mu...

Significance: Production of Ammonium Nitrate. / Built as a war measure for the production of ammonium nitrate, a key component in high explosives, U.S.N.P. No. 2 became one of the largest plants of its kind wit... More

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Muscle Shoals, Colbert County, AL

United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Mu...

Significance: Production of Ammonium Nitrate. / Built as a war measure for the production of ammonium nitrate, a key component in high explosives, U.S.N.P. No. 2 became one of the largest plants of its kind wit... More

Potomac Power Plant, On West Virginia Shore of Potomac River, about 1 mile upriver from confluence with Shenandoah River, Harpers Ferry, Jefferson County, WV

Potomac Power Plant, On West Virginia Shore of Potomac River, about 1 ...

Significance: The Potomac Power Plant was an innovative small hydroelectric facility that operated from 1899 to 1991, originally as part of a wood pulp mill (built 1888), and solely as a power house after a fir... More

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio, PR

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio,...

Significance: It was built 1779-1783 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan. It is a bastion-fort in the outer works of Castillo San Cristobal, a fan-shpaed desi... More

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio, PR

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio,...

Significance: It was built 1779-1783 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan. It is a bastion-fort in the outer works of Castillo San Cristobal, a fan-shpaed desi... More

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio, PR

Fuerte El Abanico, Boulevard Norzagaray, San Juan, San Juan Municipio,...

Significance: It was built 1779-1783 by military engineer Thomas O'Daly, Chief of the Spanish Corps of Engineers in San Juan. It is a bastion-fort in the outer works of Castillo San Cristobal, a fan-shpaed desi... More

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Significance: The Dry Dock Engine Works is significance, first of all, because of its role in manufacturing and repairing marine steam engines and boilers for Great Lakes freighters and passenger vessels from 1... More

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Significance: The Dry Dock Engine Works is significance, first of all, because of its role in manufacturing and repairing marine steam engines and boilers for Great Lakes freighters and passenger vessels from 1... More

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Significance: The Dry Dock Engine Works is significance, first of all, because of its role in manufacturing and repairing marine steam engines and boilers for Great Lakes freighters and passenger vessels from 1... More

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Significance: The Dry Dock Engine Works is significance, first of all, because of its role in manufacturing and repairing marine steam engines and boilers for Great Lakes freighters and passenger vessels from 1... More

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Significance: The Dry Dock Engine Works is significance, first of all, because of its role in manufacturing and repairing marine steam engines and boilers for Great Lakes freighters and passenger vessels from 1... More

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Dry Dock Engine Works, 1801 Atwater Street, Detroit, Wayne County, MI

Significance: The Dry Dock Engine Works is significance, first of all, because of its role in manufacturing and repairing marine steam engines and boilers for Great Lakes freighters and passenger vessels from 1... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...

Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan, San Juan Municipio, PR

Castillo de San Felipe del Morro, Northwest end of San Juan, San Juan,...

Significance: This fort is one of the three defenses erected to protect Spain's first permanent colony in the present territory of the United States. Unprocessed Field note material exists for this structure: ... More

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

Unprocessed Field note material exists for this structure: FN-8, FN-22, N69 Survey number: HABS MO-1150 Building/structure dates: 1808 Initial Construction National Register of Historic Places NRIS Number: 79003205

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

Unprocessed Field note material exists for this structure: FN-8, FN-22, N69 Survey number: HABS MO-1150 Building/structure dates: 1808 Initial Construction National Register of Historic Places NRIS Number: 79003205

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

White Haven, 7400 Grant Road, Affton, St. Louis County, MO

Unprocessed Field note material exists for this structure: FN-8, FN-22, N69 Survey number: HABS MO-1150 Building/structure dates: 1808 Initial Construction National Register of Historic Places NRIS Number: 79003205

Fuerte El Abanico, Guardhouse, Boulevard Narzagaray, San Juan, San Juan Municipio, PR

Fuerte El Abanico, Guardhouse, Boulevard Narzagaray, San Juan, San Jua...

Significance: This structure is an excellent example of mid-19th century garrison architecture. It was first used as a guardhouse and later as a carriage shed. The building has been considerably modified, parti... More

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Municipio, PR

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Munic...

Significance: Casa Blanca was built as a residence and fort for Juan Ponce de Leon and his family, although de Leon died in an expedition to Florida without ever getting to occupy the structure. He was the firs... More

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Municipio, PR

Casa Blanca, San Sebastian Street (West End), San Juan, San Juan Munic...

Significance: Casa Blanca was built as a residence and fort for Juan Ponce de Leon and his family, although de Leon died in an expedition to Florida without ever getting to occupy the structure. He was the firs... More

Chisos Basin Store, Castolon, Brewster County, TX

Chisos Basin Store, Castolon, Brewster County, TX

Significance: The Chisos Basin Store, built as a temporary structure in 1941 or early 1942, is constructed of adobe in a vaguely Spanish style, part of a larger complex with this architectural theme. After the... More

Marshall Space Flight Center, Saturn V S-IC Static Test Facility, West Test Area, Huntsville, Madison County, AL

Marshall Space Flight Center, Saturn V S-IC Static Test Facility, West...

The name of the survey was changed from "Saturn 1-C Static Test Facility" to "Saturn V S-1C Static Test Facility" to more accurately reflect its name. Significance: Engineers used the S-IC Test Stand to help de... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mo...

Significance: The Standard mill is significant as an intact example of the "model California stamp mill" that developed from the flowering of nineteenth-century developments in mining and milling technologies i... More

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