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Weaverland Bridge, Quarry Road spanning Conestoga Creek, Terre Hill, Lancaster County, PA

Weaverland Bridge, Quarry Road spanning Conestoga Creek, Terre Hill, L...

Significance: The tied-through reinforced concrete arch Weaverland Bridge, built in 1916m, is a historically and technologically significant early and rare example in the State of Pennsylvania of a rainbow type... More

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove Creek, Sylvan, Franklin County, PA

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove ...

Significance: The Yeakle Mill Bridge is one of a few surviving Pratt pony truss structures that once were common throughout South Central Pennsylvania. Designed by the Pittsburgh Bridge Company and erected thr... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Big Conestoga Creek Bridge No. 12, Spanning Conestoga River at Farmersville Road (State Route 1010), Brownstown, Lancaster County, PA

Big Conestoga Creek Bridge No. 12, Spanning Conestoga River at Farmers...

Significance: Big Conestoga Creek Bridge No. 12 is a rare combination of cantilever, arch and through-girder forms in reinforced concrete. Lancaster County engineer Frank H. Shaw, designing to meet economic co... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley J...

Significance: After fifty years of tenacious but comparatively unprofitable gold mining activities in Death Valley, the Keane Wonder strike in 1904 became the heart of Death Valley's most prosperous two decades... More

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley J...

Significance: After fifty years of tenacious but comparatively unprofitable gold mining activities in Death Valley, the Keane Wonder strike in 1904 became the heart of Death Valley's most prosperous two decades... More

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley J...

Significance: After fifty years of tenacious but comparatively unprofitable gold mining activities in Death Valley, the Keane Wonder strike in 1904 became the heart of Death Valley's most prosperous two decades... More

Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

Coverts Crossing Bridge, Spanning Mahoning River along Township Route ...

Significance: The Coverts Crossing Bridge consists of two bridge segments, as it combines a reused bridge with a new one. It is a significant example of a metal truss bridge because it exhibits transitional te... More

Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

Coverts Crossing Bridge, Spanning Mahoning River along Township Route ...

Significance: The Coverts Crossing Bridge consists of two bridge segments, as it combines a reused bridge with a new one. It is a significant example of a metal truss bridge because it exhibits transitional te... More

Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

Coverts Crossing Bridge, Spanning Mahoning River along Township Route ...

Significance: The Coverts Crossing Bridge consists of two bridge segments, as it combines a reused bridge with a new one. It is a significant example of a metal truss bridge because it exhibits transitional te... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove Creek, Sylvan, Franklin County, PA

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove ...

Significance: The Yeakle Mill Bridge is one of a few surviving Pratt pony truss structures that once were common throughout South Central Pennsylvania. Designed by the Pittsburgh Bridge Company and erected thr... More

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove Creek, Sylvan, Franklin County, PA

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove ...

Significance: The Yeakle Mill Bridge is one of a few surviving Pratt pony truss structures that once were common throughout South Central Pennsylvania. Designed by the Pittsburgh Bridge Company and erected thr... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Big Conestoga Creek Bridge No. 12, Spanning Conestoga River at Farmersville Road (State Route 1010), Brownstown, Lancaster County, PA

Big Conestoga Creek Bridge No. 12, Spanning Conestoga River at Farmers...

Significance: Big Conestoga Creek Bridge No. 12 is a rare combination of cantilever, arch and through-girder forms in reinforced concrete. Lancaster County engineer Frank H. Shaw, designing to meet economic co... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley J...

Significance: After fifty years of tenacious but comparatively unprofitable gold mining activities in Death Valley, the Keane Wonder strike in 1904 became the heart of Death Valley's most prosperous two decades... More

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley J...

Significance: After fifty years of tenacious but comparatively unprofitable gold mining activities in Death Valley, the Keane Wonder strike in 1904 became the heart of Death Valley's most prosperous two decades... More

Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

Coverts Crossing Bridge, Spanning Mahoning River along Township Route ...

Significance: The Coverts Crossing Bridge consists of two bridge segments, as it combines a reused bridge with a new one. It is a significant example of a metal truss bridge because it exhibits transitional te... More

Weaverland Bridge, Quarry Road spanning Conestoga Creek, Terre Hill, Lancaster County, PA

Weaverland Bridge, Quarry Road spanning Conestoga Creek, Terre Hill, L...

Significance: The tied-through reinforced concrete arch Weaverland Bridge, built in 1916m, is a historically and technologically significant early and rare example in the State of Pennsylvania of a rainbow type... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove Creek, Sylvan, Franklin County, PA

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove ...

Significance: The Yeakle Mill Bridge is one of a few surviving Pratt pony truss structures that once were common throughout South Central Pennsylvania. Designed by the Pittsburgh Bridge Company and erected thr... More

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove Creek, Sylvan, Franklin County, PA

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove ...

Significance: The Yeakle Mill Bridge is one of a few surviving Pratt pony truss structures that once were common throughout South Central Pennsylvania. Designed by the Pittsburgh Bridge Company and erected thr... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Big Conestoga Creek Bridge No. 12, Spanning Conestoga River at Farmersville Road (State Route 1010), Brownstown, Lancaster County, PA

Big Conestoga Creek Bridge No. 12, Spanning Conestoga River at Farmers...

Significance: Big Conestoga Creek Bridge No. 12 is a rare combination of cantilever, arch and through-girder forms in reinforced concrete. Lancaster County engineer Frank H. Shaw, designing to meet economic co... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley J...

Significance: After fifty years of tenacious but comparatively unprofitable gold mining activities in Death Valley, the Keane Wonder strike in 1904 became the heart of Death Valley's most prosperous two decades... More

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley J...

Significance: After fifty years of tenacious but comparatively unprofitable gold mining activities in Death Valley, the Keane Wonder strike in 1904 became the heart of Death Valley's most prosperous two decades... More

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley J...

Significance: After fifty years of tenacious but comparatively unprofitable gold mining activities in Death Valley, the Keane Wonder strike in 1904 became the heart of Death Valley's most prosperous two decades... More

Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

Coverts Crossing Bridge, Spanning Mahoning River along Township Route ...

Significance: The Coverts Crossing Bridge consists of two bridge segments, as it combines a reused bridge with a new one. It is a significant example of a metal truss bridge because it exhibits transitional te... More

Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

Coverts Crossing Bridge, Spanning Mahoning River along Township Route ...

Significance: The Coverts Crossing Bridge consists of two bridge segments, as it combines a reused bridge with a new one. It is a significant example of a metal truss bridge because it exhibits transitional te... More

Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

Coverts Crossing Bridge, Spanning Mahoning River along Township Route ...

Significance: The Coverts Crossing Bridge consists of two bridge segments, as it combines a reused bridge with a new one. It is a significant example of a metal truss bridge because it exhibits transitional te... More

Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

Coverts Crossing Bridge, Spanning Mahoning River along Township Route ...

Significance: The Coverts Crossing Bridge consists of two bridge segments, as it combines a reused bridge with a new one. It is a significant example of a metal truss bridge because it exhibits transitional te... More

Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

Coverts Crossing Bridge, Spanning Mahoning River along Township Route ...

Significance: The Coverts Crossing Bridge consists of two bridge segments, as it combines a reused bridge with a new one. It is a significant example of a metal truss bridge because it exhibits transitional te... More

Weaverland Bridge, Quarry Road spanning Conestoga Creek, Terre Hill, Lancaster County, PA

Weaverland Bridge, Quarry Road spanning Conestoga Creek, Terre Hill, L...

Significance: The tied-through reinforced concrete arch Weaverland Bridge, built in 1916m, is a historically and technologically significant early and rare example in the State of Pennsylvania of a rainbow type... More

Weaverland Bridge, Quarry Road spanning Conestoga Creek, Terre Hill, Lancaster County, PA

Weaverland Bridge, Quarry Road spanning Conestoga Creek, Terre Hill, L...

Significance: The tied-through reinforced concrete arch Weaverland Bridge, built in 1916m, is a historically and technologically significant early and rare example in the State of Pennsylvania of a rainbow type... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Twenty Mule Team Borax Wagons, Death Valley Junction, Inyo County, CA

Significance: The twenty mule team borax wagon's significance resides not only in their technology but also in their enduring image as an advertising and cultural symbol. Technologically, these wagons, designe... More

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove Creek, Sylvan, Franklin County, PA

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove ...

Significance: The Yeakle Mill Bridge is one of a few surviving Pratt pony truss structures that once were common throughout South Central Pennsylvania. Designed by the Pittsburgh Bridge Company and erected thr... More

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove Creek, Sylvan, Franklin County, PA

Yeakle Mill Bridge, State Route 3026 (Mill Road) spanning Little Cove ...

Significance: The Yeakle Mill Bridge is one of a few surviving Pratt pony truss structures that once were common throughout South Central Pennsylvania. Designed by the Pittsburgh Bridge Company and erected thr... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

Significance: Bodie Island Light Station served as an important aid to navigation in a system of lighthouses guiding mariners along the hazardous waters of the Outer Banks of North Carolina, often referred to a... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, Savannah, Chatham County, GA

Savannah & Ogeechee Barge Canal, Between Ogeechee & Savannah Rivers, S...

For additional documentation, see also HALS GA-5 (Savannah-Ogeechee Canal) Significance: The Savannah and Ogeechee Canal was the first barge canal built in Georgia. Built during the 'canal building' era of Ame... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van No...

Significance: The Los Angeles Aqueduct and its Mono Basin Extension delivers water to the City of Los Angeles from the Mono Basin in the Sierra Nevada Mountains through Owens Valley and across the Mojave Desert... More

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