|Bridge Name||Facility Carried / Feature Intersected||Location||Structure Type||Construction Date and Builder/Engineer|
Washington Heights Bridge
|181st Street Over Harlem River||New York: The Bronx, New York and Manhattan, New York||Metal Three-Hinged Solid Ribbed Spandrel Braced Deck Arch, Fixed and Approach Spans: Stone Semicircular Deck Arch, Fixed||1888 By Builder/Contractor: Passaic Rolling Mill Company of Paterson, New Jersey and Engineer/Design: Charles Conrad Schneider|
|Rehabilitation Date||Main Span Length||Structure Length||Roadway Width||Main Spans||Approach Spans||NBI Number|
|1992||510 Feet (155 Meters)||1684.8 Feet (513.5 Meters)||68 Feet (20.7 Meters)||2||7||2066919|
This incredible bridge is the oldest of the three metal arch bridges in this section of the Harlem River, and it is also the only one with two main metal arch spans. One metal arch span crosses the river and the other crosses land. The two spans were referred to simply as the "land span" and the "river span." The bridge features attractive stone arch approach spans as well.
The most visually pleasing and striking feature of this bridge is the grid of verticals and bracing that is present between the deck and the arch ring of this bridge. All of these members are built-up beams with v-lacing so from a distance they appear identical. In addition, this grid pattern is repeated in each arch rib, parallel to each other. There are six ribs and thus six repetitions of this grid pattern in total, and they combine to form a dazzling appearance that is unlike any other bridge.
Additional aesthetic treatment on the bridge is present at the deck level in the form of extremely ornate railings and other matching decoration at the deck line.
Above: Early 20th Century Photo of Bridge. Source: Library of Congress
The design and construction of this bridge was extensively documented in books and engineering texts of the period. One book, which is linked to at the top of this page, contains numerous drawings and photos. Some of the photos and drawings worth particular note are shown below. Also available below are improved versions of some of the drawings that are difficult to look at in the PDF book because they spread over two pages. The below images may be clicked on to load a high-resolution version of the image. The source for all the below photos is: Hutton, William R., The Washington Bridge Over The Harlem River, At 181st Street, New York City, 1889. Digitized By Google.
Above: General views of bridge construction. Note the enormous amounts of falsework, called "centers" or "centering" that was required to construct both the steel and stone arch spans.
Above: This photo shows the opening that was required in the centering for the river span to allow
Above: This photo shows one of the metal arch segments being lifted into place.
Above: This photo show the floorbeams being placed on the bridge.
Above: This bridge was built in 1888 and its design required field riveting, something not popular in the United States until the hand-held Boyer style rivet hammers came around in the early 1900s. This photo shows workers using the large riveter required in the pre-handheld era.
Above: Drawing showing an overview of the construction process.
Above: Drawings for construction equipment used for building the bridge.
Above: Views of the newly completed bridge.
Above: To the left a photo, and to the right a drawing, of the extremely ornate railings for the metal arch spans.
Above: Numerous proposals were received for the design of this bridge. The drawings as left showcase some of the proposals that were not a metal arch, and the drawings on the right show metal arch proposals including the as-built bridge.
Above: Drawing of the bearing, also called the pedestal in some texts.
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