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Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worcester County, MA

Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worc...

Significance: The Atherton Bridge is an example of a hybrid pony-truss that bears a similarity to the Post truss. The bridge is 72 feet long, 18 1/2 feet wide, and is comprised of eight panels. It rests on gr... More

Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worcester County, MA

Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worc...

Significance: The Atherton Bridge is an example of a hybrid pony-truss that bears a similarity to the Post truss. The bridge is 72 feet long, 18 1/2 feet wide, and is comprised of eight panels. It rests on gr... More

Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worcester County, MA

Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worc...

Significance: The Atherton Bridge is an example of a hybrid pony-truss that bears a similarity to the Post truss. The bridge is 72 feet long, 18 1/2 feet wide, and is comprised of eight panels. It rests on gr... More

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington, Bucks County, PA

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington,...

Significance: The Lincoln Highway was the first transcontinental automobile route linking the east and west coasts of the United States. As designated by the Lincoln Highway Association in 1913, the highway wa... More

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington, Bucks County, PA

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington,...

Significance: The Lincoln Highway was the first transcontinental automobile route linking the east and west coasts of the United States. As designated by the Lincoln Highway Association in 1913, the highway wa... More

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington, Bucks County, PA

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington,...

Significance: The Lincoln Highway was the first transcontinental automobile route linking the east and west coasts of the United States. As designated by the Lincoln Highway Association in 1913, the highway wa... More

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington, Bucks County, PA

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington,...

Significance: The Lincoln Highway was the first transcontinental automobile route linking the east and west coasts of the United States. As designated by the Lincoln Highway Association in 1913, the highway wa... More

Butler Bridge, Spans Housatonic River on Butler Road (North Glendale Road), Stockbridge, Berkshire County, MA

Butler Bridge, Spans Housatonic River on Butler Road (North Glendale R...

Significance: The Butler Bridge is an apparently unique example of a small highway bridge designed by the pre-eminent American bridge engineer George Shattuck Morison, who is remembered primarily for his long-s... More

Butler Bridge, Spans Housatonic River on Butler Road (North Glendale Road), Stockbridge, Berkshire County, MA

Butler Bridge, Spans Housatonic River on Butler Road (North Glendale R...

Significance: The Butler Bridge is an apparently unique example of a small highway bridge designed by the pre-eminent American bridge engineer George Shattuck Morison, who is remembered primarily for his long-s... More

Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster, Worcester County, MA

Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...

Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More

Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster, Worcester County, MA

Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...

Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, PA

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, P...

Significance: Zane Grey (1872-1939), a noted fisherman and author of novels about the American West, began his professional writing career in Lackawaxen, Pennsylvania where he lived from 1906 until 1918. The ho... More

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, PA

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, P...

Significance: Zane Grey (1872-1939), a noted fisherman and author of novels about the American West, began his professional writing career in Lackawaxen, Pennsylvania where he lived from 1906 until 1918. The ho... More

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, PA

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, P...

Significance: Zane Grey (1872-1939), a noted fisherman and author of novels about the American West, began his professional writing career in Lackawaxen, Pennsylvania where he lived from 1906 until 1918. The ho... More

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Route 332, Guanica, Guanica Municipio, PR

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Ro...

Significance: Still extant at the ruins of Hacienda Azucarera La Igualdad is a single column, slide-valve, side-crank beam engine of unknown manufacture that drove a three-role cane crushing mill. The plantati... More

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Route 332, Guanica, Guanica Municipio, PR

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Ro...

Significance: Still extant at the ruins of Hacienda Azucarera La Igualdad is a single column, slide-valve, side-crank beam engine of unknown manufacture that drove a three-role cane crushing mill. The plantati... More

Potowmack Company: Great Falls Canal & Locks, Great Falls, Fairfax County, Virginia

Potowmack Company: Great Falls Canal & Locks, Great Falls, Fairfax Cou...

Significance: The Great Falls Canal was a pioneer effort in the comprehensive development of a river navigation system. Constructed in the years (1786-1802) following the American Revolution, George Washington... More

North Village Bridge, Spanning French River on North Main Street, Webster, Worcester County, MA

North Village Bridge, Spanning French River on North Main Street, Webs...

Significance: The North Village Bridge is one of only five known surviving Parker patent trusses in the United States, and the second oldest of the three located in Massachusetts. The bridge was built by the N... More

North Village Bridge, Spanning French River on North Main Street, Webster, Worcester County, MA

North Village Bridge, Spanning French River on North Main Street, Webs...

Significance: The North Village Bridge is one of only five known surviving Parker patent trusses in the United States, and the second oldest of the three located in Massachusetts. The bridge was built by the N... More

North Village Bridge, Spanning French River on North Main Street, Webster, Worcester County, MA

North Village Bridge, Spanning French River on North Main Street, Webs...

Significance: The North Village Bridge is one of only five known surviving Parker patent trusses in the United States, and the second oldest of the three located in Massachusetts. The bridge was built by the N... More

Coleman Bridge, Spanning Phelps Brook, on Windsor Bush Road, at eastern edge of  Windsor State Forest, Windsor, Berkshire County, MA

Coleman Bridge, Spanning Phelps Brook, on Windsor Bush Road, at easter...

Significance: In 1893 Charles H. Ball, a mechanic and inventor from East Windsor, Massachusetts, patented a design for a small truss bridge constructed of iron pipes, which he described as "a strong, cheap brid... More

North Avenue Bridge, Spanning North Branch of Chicago River at West North Avenue, Chicago, Cook County, IL

North Avenue Bridge, Spanning North Branch of Chicago River at West No...

Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig... More

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Avenue, Cedar Avenue, River Street & Seventh Avenue, Scranton, Lackawanna County, PA

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Av...

Significance: The Scranton yards of the D,L & W Railroad are representative of twentieth-century steam-era facilities. Many structures remain from the administration of D,L & W President William H. Truesdale, ... More

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Avenue, Cedar Avenue, River Street & Seventh Avenue, Scranton, Lackawanna County, PA

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Av...

Significance: The Scranton yards of the D,L & W Railroad are representative of twentieth-century steam-era facilities. Many structures remain from the administration of D,L & W President William H. Truesdale, ... More

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Avenue, Cedar Avenue, River Street & Seventh Avenue, Scranton, Lackawanna County, PA

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Av...

Significance: The Scranton yards of the D,L & W Railroad are representative of twentieth-century steam-era facilities. Many structures remain from the administration of D,L & W President William H. Truesdale, ... More

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Avenue, Cedar Avenue, River Street & Seventh Avenue, Scranton, Lackawanna County, PA

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Av...

Significance: The Scranton yards of the D,L & W Railroad are representative of twentieth-century steam-era facilities. Many structures remain from the administration of D,L & W President William H. Truesdale, ... More

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great Salt Lake, Brigham City, Box Elder County, UT

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great ...

Significance: The Ogden-Lucin Cut-Off, built 1902-1904 by the Southern Pacific Railroad across the Great Salt Lake, is possibly the most noteworthy achievement of bridge and fill work in the United States. Will... More

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great Salt Lake, Brigham City, Box Elder County, UT

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great ...

Significance: The Ogden-Lucin Cut-Off, built 1902-1904 by the Southern Pacific Railroad across the Great Salt Lake, is possibly the most noteworthy achievement of bridge and fill work in the United States. Will... More

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great Salt Lake, Brigham City, Box Elder County, UT

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great ...

Significance: The Ogden-Lucin Cut-Off, built 1902-1904 by the Southern Pacific Railroad across the Great Salt Lake, is possibly the most noteworthy achievement of bridge and fill work in the United States. Will... More

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great Salt Lake, Brigham City, Box Elder County, UT

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great ...

Significance: The Ogden-Lucin Cut-Off, built 1902-1904 by the Southern Pacific Railroad across the Great Salt Lake, is possibly the most noteworthy achievement of bridge and fill work in the United States. Will... More

Pinto Wye Arrastra, Twentynine Palms, San Bernardino County, CA

Pinto Wye Arrastra, Twentynine Palms, San Bernardino County, CA

Significance: The arrastra is an important example of nineteenth- and twentieth-century milling technology. This specimen is unusual because it used a wooden wheel as the pivot mechanism; only two of this type... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Mountain Dell Dam, Parley's Canyon, Northwest side of I-80, West of State Route 39, Salt Lake City, Salt Lake County, UT

Mountain Dell Dam, Parley's Canyon, Northwest side of I-80, West of St...

Significance: Mountain Dell Dam is an early application of multiple-arch reinforced-concrete construction to dam engineering. The design developed by John S. Eastwood consisted of a series of arches set at an a... More

Estate Reef Bay, Sugar Factory, Reef Bay, St. John, VI

Estate Reef Bay, Sugar Factory, Reef Bay, St. John, VI

Significance: The factory at Estate Reef Bay affords one of the finest surviving examples of the sugar industry in the West Indies. Boiling coppers, used for processing cane-juice, remain in place in their maso... More

Estate Reef Bay, Sugar Factory, Reef Bay, St. John, VI

Estate Reef Bay, Sugar Factory, Reef Bay, St. John, VI

Significance: The factory at Estate Reef Bay affords one of the finest surviving examples of the sugar industry in the West Indies. Boiling coppers, used for processing cane-juice, remain in place in their maso... More

Boxley Grist Mill, Boxley vicinity on State Route 43, Buffalo National River, Ponca, Newton County, AR

Boxley Grist Mill, Boxley vicinity on State Route 43, Buffalo National...

Significance: The Boxley Grist Mill is an example of a once common industry which provided custom milling services in rural areas. The mill, though deteriorated, still retains the millpond, raceways, machinery... More

Boxley Grist Mill, Boxley vicinity on State Route 43, Buffalo National River, Ponca, Newton County, AR

Boxley Grist Mill, Boxley vicinity on State Route 43, Buffalo National...

Significance: The Boxley Grist Mill is an example of a once common industry which provided custom milling services in rural areas. The mill, though deteriorated, still retains the millpond, raceways, machinery... More

Silver King Mining Company, Ore Loading Station, Park Avenue, Park City, Summit County, UT

Silver King Mining Company, Ore Loading Station, Park Avenue, Park Cit...

Significance: One problem encountered by the Silver King Mining Company was the transportation of its ore over the rough terrain between the mine and the railhead in Park City. The solution was a 7,000' long ae... More

Hurricane Irrigation Canal, State Route 15 Vicinity, Hurricane, Washington County, UT

Hurricane Irrigation Canal, State Route 15 Vicinity, Hurricane, Washin...

Significance: When an expanding population created a demand for more farmland, the residents of the narrow Virgin River valley turned to the Hurricane Bench, a broad expanse of fertile land requiring only water... More

Hacienda Azurarera Santa Elena, Sugar Mill Ruins, 1.44 miles North of PR Route 2 Bridge Over Rio De La Plata, Toa Baja, Toa Baja Municipio, PR

Hacienda Azurarera Santa Elena, Sugar Mill Ruins, 1.44 miles North of ...

Significance: The ruins are the only extant remains pertaining to an industrial building in Puerto Rico dating back to the late 18th century. They illustrate the transition from a cattle-driven vertical wooden... More

Tintic Standard Reduction Mill, Warm Springs Mountain, Goshen, Utah County, UT

Tintic Standard Reduction Mill, Warm Springs Mountain, Goshen, Utah Co...

Significance: The Tintic Standard Reduction Mill was the only use of the antiquated Augustin process in the United States during the early 1920s. The Augustin process was an acid-brine chlorodizing and leaching... More

Aluminum City Terrace, East Hill Drive, New Kensington, Westmoreland County, PA

Aluminum City Terrace, East Hill Drive, New Kensington, Westmoreland C...

See also HAER PA-343 for related documentation. Includes written data. Significance: Aluminum City Terrace, the only housing project in America designed by world-renowned architects Walter Gropius and Marcel Br... More

Aluminum City Terrace, East Hill Drive, New Kensington, Westmoreland County, PA

Aluminum City Terrace, East Hill Drive, New Kensington, Westmoreland C...

See also HAER PA-343 for related documentation. Includes written data. Significance: Aluminum City Terrace, the only housing project in America designed by world-renowned architects Walter Gropius and Marcel Br... More

Hopewell Bridge, Spanning Little Sandy River, Hopewell, Greenup County, KY

Hopewell Bridge, Spanning Little Sandy River, Hopewell, Greenup County...

Survey number: HAER KY-36 Public domain photograph - historical image of Kentucky, United States, free to use, no copyright restrictions image - Picryl description

Hopewell Bridge, Spanning Little Sandy River, Hopewell, Greenup County, KY

Hopewell Bridge, Spanning Little Sandy River, Hopewell, Greenup County...

Survey number: HAER KY-36 Public domain photograph - historical image of Kentucky, United States, free to use, no copyright restrictions image - Picryl description

Peavey Globe Elevator, No. 1 House, West Gate Basin & Howard's Bay, east side of slip, Superior, Douglas County, WI

Peavey Globe Elevator, No. 1 House, West Gate Basin & Howard's Bay, ea...

Significance: The Peavey Globe Elevator was one of several grain elevators built in the first half of the twentieth century on the opposing Lake Superior harbors of Duluth, Minnesota, and Superior, Wisconsin. ... More

Bardwell's Ferry Bridge, Spanning Deerfield River on Bardwell's Ferry Road, Shelburne, Franklin County, MA

Bardwell's Ferry Bridge, Spanning Deerfield River on Bardwell's Ferry ...

Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular ... More

Wawona Covered Bridge, Spanning South Fork Merced River on service road, Wawona, Mariposa County, CA

Wawona Covered Bridge, Spanning South Fork Merced River on service roa...

part of Yosemite National Park Roads and Bridges Recording Project, 1991; see HAER No. CA-117 for overview Significance: The Wawona Covered Bridge is the oldest bridge in Yosemite National Park and a rare examp... More

North Halsted Street Canal Bridge, Spanning North Branch Canal at North Halsted Street, Chicago, Cook County, IL

North Halsted Street Canal Bridge, Spanning North Branch Canal at Nort...

Significance: Spanning the North Branch Canal at North Halsted Street in Chicago, the North Halsted Street Bridge is a double-leaf, fixed-trunnion bascule with a rigidly attached, below-deck counterweight. Com... More

Denver & Rio Grande Western Railroad, Provo River Bridge, Spanning Provo River, Orem Vicinity, Orem, Utah County, UT

Denver & Rio Grande Western Railroad, Provo River Bridge, Spanning Pro...

Significance: The Provo River Bridge is a significant example of a Pratt through-truss bridge and is assumed to be built all of wrought iron. The bridge surveyed was originally one of three spans built in 1884 ... More

Denver & Rio Grande Western Railroad, Provo River Bridge, Spanning Provo River, Orem Vicinity, Orem, Utah County, UT

Denver & Rio Grande Western Railroad, Provo River Bridge, Spanning Pro...

Significance: The Provo River Bridge is a significant example of a Pratt through-truss bridge and is assumed to be built all of wrought iron. The bridge surveyed was originally one of three spans built in 1884 ... More

Whipple Cast & Wrought Iron Bowstring Truss Bridge, Normans Kill Vicinity, Albany, Albany County, NY

Whipple Cast & Wrought Iron Bowstring Truss Bridge, Normans Kill Vicin...

Bridge moved to present location ca. 1900. More information is available by reviewing U.S. patent no. 2064. Significance: One of only two known surviving "Whipple" bowstring truss bridges, and one of the few re... More

Whipple Cast & Wrought Iron Bowstring Truss Bridge, Normans Kill Vicinity, Albany, Albany County, NY

Whipple Cast & Wrought Iron Bowstring Truss Bridge, Normans Kill Vicin...

Bridge moved to present location ca. 1900. More information is available by reviewing U.S. patent no. 2064. Significance: One of only two known surviving "Whipple" bowstring truss bridges, and one of the few re... More

Mormon Tabernacle, Temple Square, Salt Lake City, Salt Lake County, UT

Mormon Tabernacle, Temple Square, Salt Lake City, Salt Lake County, UT

See also HABS UT-36-2 for additional documentation. Significance: The Church of Jesus Christ of the Latter-Day Saints started construction of its Salt Lake City Tabernacle on 26 July 1864, and held its first co... More

Mormon Tabernacle, Temple Square, Salt Lake City, Salt Lake County, UT

Mormon Tabernacle, Temple Square, Salt Lake City, Salt Lake County, UT

See also HABS UT-36-2 for additional documentation. Significance: The Church of Jesus Christ of the Latter-Day Saints started construction of its Salt Lake City Tabernacle on 26 July 1864, and held its first co... More

Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worcester County, MA

Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worc...

Significance: The Atherton Bridge is an example of a hybrid pony-truss that bears a similarity to the Post truss. The bridge is 72 feet long, 18 1/2 feet wide, and is comprised of eight panels. It rests on gr... More

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington, Bucks County, PA

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington,...

Significance: The Lincoln Highway was the first transcontinental automobile route linking the east and west coasts of the United States. As designated by the Lincoln Highway Association in 1913, the highway wa... More

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington, Bucks County, PA

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington,...

Significance: The Lincoln Highway was the first transcontinental automobile route linking the east and west coasts of the United States. As designated by the Lincoln Highway Association in 1913, the highway wa... More

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington, Bucks County, PA

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington,...

Significance: The Lincoln Highway was the first transcontinental automobile route linking the east and west coasts of the United States. As designated by the Lincoln Highway Association in 1913, the highway wa... More

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington, Bucks County, PA

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington,...

Significance: The Lincoln Highway was the first transcontinental automobile route linking the east and west coasts of the United States. As designated by the Lincoln Highway Association in 1913, the highway wa... More

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington, Bucks County, PA

Lincoln Highway, Running from Philadelphia to Pittsburgh, Fallsington,...

Significance: The Lincoln Highway was the first transcontinental automobile route linking the east and west coasts of the United States. As designated by the Lincoln Highway Association in 1913, the highway wa... More

Butler Bridge, Spans Housatonic River on Butler Road (North Glendale Road), Stockbridge, Berkshire County, MA

Butler Bridge, Spans Housatonic River on Butler Road (North Glendale R...

Significance: The Butler Bridge is an apparently unique example of a small highway bridge designed by the pre-eminent American bridge engineer George Shattuck Morison, who is remembered primarily for his long-s... More

Butler Bridge, Spans Housatonic River on Butler Road (North Glendale Road), Stockbridge, Berkshire County, MA

Butler Bridge, Spans Housatonic River on Butler Road (North Glendale R...

Significance: The Butler Bridge is an apparently unique example of a small highway bridge designed by the pre-eminent American bridge engineer George Shattuck Morison, who is remembered primarily for his long-s... More

Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster, Worcester County, MA

Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...

Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, PA

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, P...

Significance: Zane Grey (1872-1939), a noted fisherman and author of novels about the American West, began his professional writing career in Lackawaxen, Pennsylvania where he lived from 1906 until 1918. The ho... More

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, PA

Zane Grey House, West side of Scenic Drive, Lackawaxen, Pike County, P...

Significance: Zane Grey (1872-1939), a noted fisherman and author of novels about the American West, began his professional writing career in Lackawaxen, Pennsylvania where he lived from 1906 until 1918. The ho... More

Philadelphia, Wilmington & Baltimore Railroad, President Street Station, President & Fleet Streets, Baltimore, Independent City, MD

Philadelphia, Wilmington & Baltimore Railroad, President Street Statio...

Significance: As of 1974, the President St. Station was one of the oldest large city railroad terminals still standing in the United States. The station quite possibly contains one of the earliest uses of the ... More

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Route 332, Guanica, Guanica Municipio, PR

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Ro...

Significance: Still extant at the ruins of Hacienda Azucarera La Igualdad is a single column, slide-valve, side-crank beam engine of unknown manufacture that drove a three-role cane crushing mill. The plantati... More

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Route 332, Guanica, Guanica Municipio, PR

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Ro...

Significance: Still extant at the ruins of Hacienda Azucarera La Igualdad is a single column, slide-valve, side-crank beam engine of unknown manufacture that drove a three-role cane crushing mill. The plantati... More

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Route 332, Guanica, Guanica Municipio, PR

Hacienda Azucarera la Igualdad, Sugar Mill Ruins & Steam Engine, PR Ro...

Significance: Still extant at the ruins of Hacienda Azucarera La Igualdad is a single column, slide-valve, side-crank beam engine of unknown manufacture that drove a three-role cane crushing mill. The plantati... More

Estate Whim, Overhead Crank Steam Engine & Cane Mill, Westend Quarter, Centerline Road, Frederiksted, St. Croix, VI

Estate Whim, Overhead Crank Steam Engine & Cane Mill, Westend Quarter,...

Significance: The overhead crank steam engine and associated cane crusher now displayed at the Estate Whim Museum were manufactured by P. & W. McOnie, Glasgow, Scotland in 1847. Originally installed at Estate M... More

Coleman Bridge, Spanning Phelps Brook, on Windsor Bush Road, at eastern edge of  Windsor State Forest, Windsor, Berkshire County, MA

Coleman Bridge, Spanning Phelps Brook, on Windsor Bush Road, at easter...

Significance: In 1893 Charles H. Ball, a mechanic and inventor from East Windsor, Massachusetts, patented a design for a small truss bridge constructed of iron pipes, which he described as "a strong, cheap brid... More

North Avenue Bridge, Spanning North Branch of Chicago River at West North Avenue, Chicago, Cook County, IL

North Avenue Bridge, Spanning North Branch of Chicago River at West No...

Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig... More

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Avenue, Cedar Avenue, River Street & Seventh Avenue, Scranton, Lackawanna County, PA

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Av...

Significance: The Scranton yards of the D,L & W Railroad are representative of twentieth-century steam-era facilities. Many structures remain from the administration of D,L & W President William H. Truesdale, ... More

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Avenue, Cedar Avenue, River Street & Seventh Avenue, Scranton, Lackawanna County, PA

Delaware, Lackawanna & Western Railroad, Scranton Yards, Lackawanna Av...

Significance: The Scranton yards of the D,L & W Railroad are representative of twentieth-century steam-era facilities. Many structures remain from the administration of D,L & W President William H. Truesdale, ... More

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great Salt Lake, Brigham City, Box Elder County, UT

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great ...

Significance: The Ogden-Lucin Cut-Off, built 1902-1904 by the Southern Pacific Railroad across the Great Salt Lake, is possibly the most noteworthy achievement of bridge and fill work in the United States. Will... More

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great Salt Lake, Brigham City, Box Elder County, UT

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great ...

Significance: The Ogden-Lucin Cut-Off, built 1902-1904 by the Southern Pacific Railroad across the Great Salt Lake, is possibly the most noteworthy achievement of bridge and fill work in the United States. Will... More

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great Salt Lake, Brigham City, Box Elder County, UT

Southern Pacific Railroad, Ogden-Lucin Cutoff Trestle, Spanning Great ...

Significance: The Ogden-Lucin Cut-Off, built 1902-1904 by the Southern Pacific Railroad across the Great Salt Lake, is possibly the most noteworthy achievement of bridge and fill work in the United States. Will... More

Glendale-Hyperion Viaduct, Spanning Golden State Freeway (I-5) & Los Angeles River at Glendale Boulevard, Los Angeles, Los Angeles County, CA

Glendale-Hyperion Viaduct, Spanning Golden State Freeway (I-5) & Los A...

Significance: Glendale-Hyperion Bridge is significant as one of the twelve Historic bridges over the Los Angeles River determined eligible for the National Register of Historic Places. It has also been designa... More

Glendale-Hyperion Viaduct, Spanning Golden State Freeway (I-5) & Los Angeles River at Glendale Boulevard, Los Angeles, Los Angeles County, CA

Glendale-Hyperion Viaduct, Spanning Golden State Freeway (I-5) & Los A...

Significance: Glendale-Hyperion Bridge is significant as one of the twelve Historic bridges over the Los Angeles River determined eligible for the National Register of Historic Places. It has also been designa... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Mountain Dell Dam, Parley's Canyon, Northwest side of I-80, West of State Route 39, Salt Lake City, Salt Lake County, UT

Mountain Dell Dam, Parley's Canyon, Northwest side of I-80, West of St...

Significance: Mountain Dell Dam is an early application of multiple-arch reinforced-concrete construction to dam engineering. The design developed by John S. Eastwood consisted of a series of arches set at an a... More

Estate Reef Bay, Sugar Factory, Reef Bay, St. John, VI

Estate Reef Bay, Sugar Factory, Reef Bay, St. John, VI

Significance: The factory at Estate Reef Bay affords one of the finest surviving examples of the sugar industry in the West Indies. Boiling coppers, used for processing cane-juice, remain in place in their maso... More

Peavey Globe Elevator, West Gate Basin & Howard's Bay, east side of slip, Superior, Douglas County, WI

Peavey Globe Elevator, West Gate Basin & Howard's Bay, east side of sl...

Significance: The Peavey Globe Elevator was one of several grain elevators built in the first half of the twentieth century on the opposing Lake Superior harbors of Duluth, Minnesota, and Superior, Wisconsin. ... More

Peavey Globe Elevator, No. 2 House, West Gate Basin & Howard's Bay, east side of slip, Superior, Douglas County, WI

Peavey Globe Elevator, No. 2 House, West Gate Basin & Howard's Bay, ea...

Significance: The Peavey Globe Elevator was one of several grain elevators built in the first half of the twentieth century on the opposing Lake Superior harbors of Duluth, Minnesota, and Superior, Wisconsin. ... More

Boxley Grist Mill, Boxley vicinity on State Route 43, Buffalo National River, Ponca, Newton County, AR

Boxley Grist Mill, Boxley vicinity on State Route 43, Buffalo National...

Significance: The Boxley Grist Mill is an example of a once common industry which provided custom milling services in rural areas. The mill, though deteriorated, still retains the millpond, raceways, machinery... More

Silver King Mining Company, Ore Loading Station, Park Avenue, Park City, Summit County, UT

Silver King Mining Company, Ore Loading Station, Park Avenue, Park Cit...

Significance: One problem encountered by the Silver King Mining Company was the transportation of its ore over the rough terrain between the mine and the railhead in Park City. The solution was a 7,000' long ae... More

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