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81-652: The Aurora Bridge (officially called the George Washington Memorial Bridge ) is a cantilever and truss bridge in Seattle, Washington , United States. It carries State Route 99 ( Aurora Avenue North) over the west end of Seattle 's Lake Union and connects Queen Anne and Fremont . The bridge is located just east of the Fremont Cut , which itself is spanned by the Fremont Bridge . The Aurora Bridge

162-423: A balanced cantilever ; when they attach to a solid foundation, the counterbalancing arms are called anchor arms . Thus, in a bridge built on two foundation piers, there are four cantilever arms: two which span the obstacle, and two anchor arms that extend away from the obstacle. Because of the need for more strength at the balanced cantilever's supports, the bridge superstructure often takes the form of towers above

243-471: A brain hemorrhage while it was still under construction. Federal funding programs were not available at the time, so the bridge was funded by Seattle, King County, and the state of Washington. The bridge was nominated for the National Register of Historic Places on January 2, 1980, on account of its "functional and aesthetic" design qualities and its historical status as the first bridge constructed in

324-459: A charter bus on the bridge in a collision that also involved two smaller vehicles. According to a representative from the Chinese consulate, all of the students were foreign-born. The students all attended North Seattle College , and were on their way to Safeco Field for new student orientation. One witness reported that it appeared as though the duck boat veered into the oncoming bus, after crossing

405-527: A charter bus on the bridge in an incident that also involved two smaller vehicles. The bridge is 2,945 ft (898 m) long, 70 ft (21 m) wide, 167 ft (51 m) above the water and is owned and operated by the Washington State Department of Transportation (WSDOT). There are two V-shaped cantilever sections supporting the bridge deck, each 325 ft (99 m) long and balanced on large concrete pilings at opposite sides of

486-503: A grain elevator , a gazebo and a bridge. Objects are usually artistic in nature, or small in scale compared to structures and buildings. Although objects may be movable, they are generally associated with a specific setting or environment. Examples of objects include monuments, sculptures and fountains. Sites are the locations of significant events, which can be prehistoric or historic in nature and represent activities or buildings (standing, ruined, or vanished). When sites are listed, it

567-472: A National Register nomination, although historians and historic preservation consultants often are employed for this work. The nomination consists of a standard registration form (NPS 10-900) and contains basic information about a property's physical appearance and the type of significance embodied in the building, structure, object, site, or district. The State Historic Preservation Office (SHPO) receives National Register nominations and provides feedback to

648-496: A bridge that could handle differential settlement of the foundations. Engineers could more easily calculate the forces and stresses with a hinge in the girder. Heinrich Gerber was one of the engineers to obtain a patent for a hinged girder (1866) and is recognized as the first to build one. The Hassfurt Bridge over the Main river in Germany with a central span of 124 feet (38 metres)

729-546: A historic district are united historically or aesthetically, either by choice or by the nature of their development. There are several other different types of historic preservation associated with the properties of the National Register of Historic Places that cannot be classified as either simple buildings or historic districts. Through the National Park Service, the National Register of Historic Places publishes

810-646: A policy developed early in its history. The United States Supreme Court ruled in the 1971 case Citizens to Preserve Overton Park v. Volpe that parklands could have the same protected status as " historic sites ". Listed properties are generally in one of five broad categories, although there are special considerations for other types of properties that in anyone, or into more specialized subcategories. The five general categories for National Register properties are: building, structure, site, district and object. In addition, historic districts consist of contributing and non-contributing properties. Buildings, as defined by

891-607: A series of bulletins designed to aid in evaluating and applying the criteria for evaluation of different types of properties. Although the criteria are always the same, the manner they are applied may differ slightly, depending upon the type of property involved. The National Register bulletins describe the application of the criteria for aids to navigation, historic battlefields, archaeological sites, aviation properties, cemeteries and burial places, historic designed landscapes , mining sites, post offices, properties associated with significant persons, properties achieving significance within

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972-596: Is available to support the tension in the upper chord of the span during construction, usually limiting this method to the spanning of narrow canyons. World's longest cantilever bridges (by longest span): National Register of Historic Places The National Register of Historic Places ( NRHP ) is the United States federal government 's official list of sites, buildings, structures, districts , and objects deemed worthy of preservation for their historical significance or "great artistic value". The enactment of

1053-531: Is only an exception to the criteria that shape listings within the National Register of Historic Places. Of the eight "exceptions" [or criteria considerations], Consideration G, for properties that have achieved significance within the past fifty years, is probably the best-known, yet also misunderstood preservation principle in America. The National Register evaluation procedures do not use the term "exclusions". The stricter National Historic Landmarks Criteria, upon which

1134-527: Is owned and operated by the Washington State Department of Transportation . It is 2,945 ft (898 m) long, 70 ft (21 m) wide, and 167 ft (51 m) above the water. The bridge was opened to traffic on February 22, 1932, the 200th anniversary of the birth of its namesake, George Washington , a Founding Father and first president of the United States. It was listed on the National Register of Historic Places in 1982. The bridge has been

1215-520: Is required to "take into account the effect of the undertaking" on the National Register property, as well as to afford the ACHP a reasonable opportunity to comment. While Section 106 does not mandate explicitly that any federal agency director accept the advice of the ACHP, their advice has a practical influence, especially given the statutory obligations of the NHPA that require federal agencies to "take into account

1296-462: Is the locations themselves that are of historical interest. They possess cultural or archaeological value regardless of the value of any structures that currently exist at the locations. Examples of types of sites include shipwrecks , battlefields , campsites , natural features and rock shelters . Historic districts possess a concentration, association, or continuity of the other four types of properties. Objects, structures, buildings and sites in

1377-574: The Advisory Council on Historic Preservation (ACHP) has the most significant role by Section 106 of the National Historic Preservation Act. The section requires that the director of any federal agency with direct or indirect jurisdiction of a project that may affect a property listed or determined eligible for listing in the National Register of Historic Places must first report to the Advisory Council . The director of said agency

1458-567: The Advisory Council on Historic Preservation (ACHP), to confront adverse effects of federal activities on historic preservation. To administer the newly created National Register of Historic Places, the National Park Service of the U.S. Department of the Interior, with director George B. Hartzog Jr. , established an administrative division named the Federal Office of Archaeology and Historic Preservation (OAHP). Hartzog charged OAHP with creating

1539-635: The National Historic Landmarks designated before the Register's creation, as well as any other historic sites in the National Park System. Approval of the act, which was amended in 1980 and 1992, represented the first time the United States had a broad-based historic preservation policy. The 1966 act required those agencies to work in conjunction with the SHPO and an independent federal agency ,

1620-580: The National Historic Preservation Act (NHPA) in 1966 established the National Register and the process for adding properties to it. Of the more than one and a half million properties on the National Register, 95,000 are listed individually. The remainder are contributing resources within historic districts . For most of its history, the National Register has been administered by the National Park Service (NPS), an agency within

1701-458: The Navajo Bridge ) are built using pure cantilever spans from each side, with neither falsework below nor temporary supporting towers and cables above. These are then joined with a pin, usually after forcing the union point apart, and when jacks are removed and the bridge decking is added the bridge becomes a truss arch bridge . Such unsupported construction is only possible where appropriate rock

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1782-556: The United States Department of the Interior . In February 1983, the two assistant directorates were merged to promote efficiency and recognize the interdependency of their programs. Jerry L. Rogers was selected to direct this newly merged associate directorate. He was described as a skilled administrator, who was sensitive to the need for the NPS to work with SHPOs, academia and local governments. Although not described in detail in

1863-460: The United States Department of the Interior . Its goals are to help property owners and interest groups, such as the National Trust for Historic Preservation , and coordinate, identify and protect historic sites in the United States. While National Register listings are mostly symbolic, their recognition of significance provides some financial incentive to owners of listed properties. Protection of

1944-624: The 1966 act, SHPOs eventually became integral to the process of listing properties on the National Register. The 1980 amendments of the 1966 law further defined the responsibilities of SHPOs concerning the National Register. Several 1992 amendments of the NHPA added a category to the National Register, known as Traditional Cultural Properties: those properties associated with Native American or Hawaiian groups. The National Register of Historic Places has grown considerably from its legislative origins in 1966. In 1986, citizens and groups nominated 3,623 separate properties, sites and districts for inclusion on

2025-435: The 19th century understood that a bridge that was continuous across multiple supports would distribute the loads among them. This would result in lower stresses in the girder or truss and meant that longer spans could be built. Several 19th-century engineers patented continuous bridges with hinge points mid-span. The use of a hinge in the multi-span system presented the advantages of a statically determinate system and of

2106-473: The Fremont Individuals and Employees Nonprofit to Decrease Suicides (FRIENDS), their primary focus being the installation of a suicide barrier on the bridge. In 2007, Washington Governor Christine Gregoire allocated $ 1.4 million in her supplemental budget for the construction of an 8-foot-high (2.4 m) suicide-prevention fence to help reduce the number of suicides on the bridge. Construction of

2187-567: The NPS history programs affiliated with both the U.S. National Park system and the National Register were categorized formally into two "Assistant Directorates". Established were the Assistant Directorate for Archeology and Historic Preservation and the Assistant Directorate for Park Historic Preservation. From 1978 until 1981, the main agency for the National Register was the Heritage Conservation and Recreation Service (HCRS) of

2268-625: The National Park Service, including National Historic Sites (NHS), National Historical Parks , National Military Parks /Battlefields, National Memorials and some National Monuments . There are also 35 listed sites in the three island countries with a Compact of Free Association with the United States, as well as one site in Morocco, the American Legation in Tangier . Listing in the National Register does not restrict private property owners from

2349-448: The National Register criteria are based, do specify exclusions, along with corresponding "exceptions to the exclusions", which are supposed to apply more narrowly. A multiple property submission (MPS) is a thematic group listing of the National Register of Historic Places that consists of related properties that share a common theme and can be submitted as a group. Multiple property submissions must satisfy certain basic criteria for

2430-655: The National Register program mandated by the 1966 law. Ernest Connally was the Office's first director. Within OAHP new divisions were created to deal with the National Register. The division administered several existing programs, including the Historic Sites Survey and the Historic American Buildings Survey , as well as the new National Register and Historic Preservation Fund . The first official Keeper of

2511-558: The National Register when they become administered by the National Park Service. These include National Historic Landmarks (NHL), National Historic Sites (NHS), National Historical Parks , National Military Parks , National Memorials , and some National Monuments . On October 15, 1966, the Historic Preservation Act created the National Register of Historic Places and the corresponding State Historic Preservation Offices (SHPO). The National Register initially consisted of

Aurora Bridge - Misplaced Pages Continue

2592-591: The National Register, a total of 75,000 separate properties. Of the more than one and a half million properties on the National Register, 95,000 are listed individually. Others are listed as contributing members within historic districts . It is hereby declared to be the policy of the United States Government that special effort should be made to preserve the natural beauty of the countryside and public park and recreation lands, wildlife and waterfowl refuges, and historic sites. Any individual can prepare

2673-530: The National Register, are distinguished in the traditional sense. Examples include a house, barn, hotel, church, or similar construction. They are created primarily to shelter human activity. The term building, as in outbuilding, can be used to refer to historically and functionally related units, such as a courthouse and a jail or a barn and a house. Structures differ from buildings in that they are functional constructions meant to be used for purposes other than sheltering human activity. Examples include an aircraft,

2754-456: The National Register. After the nomination is recommended for listing in the National Register by the SHPO, the nomination is sent to the National Park Service, which approves or denies the nomination. If approved, the property is entered officially by the Keeper of the National Register into the National Register of Historic Places. Property owners are notified of the nomination during the review by

2835-518: The National Register: religious properties (e.g., churches); buildings that have been moved; birthplaces or graves of important persons; cemeteries; reconstructed properties; commemorative properties (e.g., statues); and "properties that have achieved significance within the last fifty years". However, if they meet particular "Criteria Considerations" for their category in addition to the overall criteria, they are, in fact, eligible. Hence, despite

2916-537: The Register was William J. Murtagh , an architectural historian . During the Register's earliest years in the late 1960s and early 1970s, organization was lax and SHPOs were small, understaffed and underfunded. However, funds were still being supplied for the Historic Preservation Fund to provide matching grants-in-aid to listed property owners, first for house museums and institutional buildings, but later for commercial structures as well. In 1979,

2997-426: The Register, as well as those located in and contributing to the period of significance of National Register Historic Districts, became eligible for the federal tax benefits. Owners of income-producing properties listed individually in the National Register of Historic Places or of properties that are contributing resources within a National Register Historic District may be eligible for a 20% investment tax credit for

3078-527: The SHPO and state's historic review commission. If an owner objects to a nomination of private property, or in the case of a historic district, a majority of owners, then the property cannot be listed in the National Register of Historic Places. For a property to be eligible for the National Register of Historic Places, it must meet at least one of its four main criteria. Information about architectural styles , association with various aspects of social history and commerce and ownership are all integral parts of

3159-465: The acceptable standards and no immediate corrective action was needed to improve it. The George Washington Memorial Bridge underwent extensive seismic retrofitting in 2011 and 2012 at a cost of $ 5.7 million. During a regular inspection in October 2019, WSDOT structural engineers determined that an outside stringer beam on the southbound side of the bridge had corroded to the point of creating a visible sag in

3240-415: The action of the outer foundations. Cantilever Bridge.—A structure at least one portion of which acts as an anchorage for sustaining another portion which extends beyond the supporting pier. A simple cantilever span is formed by two cantilever arms extending from opposite sides of an obstacle to be crossed, meeting at the center. In a common variant, the suspended span , the cantilever arms do not meet in

3321-529: The bridge's eastern side onto the roof of an apartment building below. Herman Liebelt, a passenger on the bus, later died of injuries he sustained in the crash. According to estimates from WSDOT, repairs to the bridge cost over $ 18,000. Medical claims from the victims against King County amounted to $ 2.3 million. A service for McLaughlin was held on December 8, 1998, at KeyArena in Seattle. Numerous state and county officials and over 100 transit drivers attended

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3402-408: The center line. Some blame for the collision was placed on the narrowness of the 57-foot-wide (17 m) bridge deck, which has 9.5-foot-wide (2.9 m) lanes, and the lack of a median barrier to separate the two directions of traffic. There have also been some calls to reduce the number of lanes from six narrow lanes to four wider lanes, although early reports indicated that a mechanical failure of

3483-423: The center; instead, they support a central truss bridge which rests on the ends of the cantilever arms. The suspended span may be built off-site and lifted into place, or constructed in place using special travelling supports. A common way to construct steel truss and prestressed concrete cantilever spans is to counterbalance each cantilever arm with another cantilever arm projecting the opposite direction, forming

3564-409: The duck tour vehicles' front axle may have also been a major factor in the crash. The bridge's height and pedestrian access make it a popular location for suicide jumpers. Since construction, there have been over 230 suicides from the bridge, with nearly 50 deaths occurring in the decade 1995–2005. The first suicide occurred on January 20, 1932, when a shoe salesman leapt from the bridge before it

3645-538: The effect of the undertaking". In cases where the ACHP determines federal action will have an "adverse effect" on historic properties, mitigation is sought. Typically, a Memorandum of Agreement (MOA) is created by which the involved parties agree to a particular plan. Many states have laws similar to Section 106. In contrast to conditions relating to a federally designated historic district, municipal ordinances governing local historic districts often restrict certain kinds of changes to properties. Thus, they may protect

3726-480: The fall from the bridge, though not without sustaining serious injuries. News sources have referred to the George Washington Memorial Bridge as a suicide bridge . In December 2006, six emergency phones and 18 signs were installed on the bridge to encourage people to seek help instead of jumping. Around that time, a group of community activists and political leaders living near the bridge created

3807-459: The fence began in spring 2010 and was completed in February 2011, at a total cost of $ 4.8 million. Cantilever bridge The steel truss cantilever bridge was a major engineering breakthrough when first put into practice, as it can span distances of over 1,500 feet (450 m), and can be more easily constructed at difficult crossings by virtue of using little or no falsework . Engineers in

3888-511: The forbidding language, these kinds of places are not actually excluded as a rule. For example, the Register lists thousands of churches. There is a misconception that there is a strict rule that a property must be at least 50 years old to be listed in the National Register of Historic Places. In reality, there is no hard rule. John H. Sprinkle Jr., deputy director of the Federal Preservation Institute, stated: [T]his "rule"

3969-648: The foundation piers. The Commodore Barry Bridge is an example of this type of cantilever bridge. Steel truss cantilevers support loads by tension of the upper members and compression of the lower ones. Commonly, the structure distributes the tension via the anchor arms to the outermost supports, while the compression is carried to the foundations beneath the central towers. Many truss cantilever bridges use pinned joints and are therefore statically determinate with no members carrying mixed loads. Prestressed concrete balanced cantilever bridges are often built using segmental construction . Some steel arch bridges (such as

4050-401: The future. Thus, additions to an MPS can occur over time. The nomination of individual properties in an MPS is accomplished in the same manner as other nominations. The name of the "thematic group" denotes the historical theme of the properties. It is considered the "multiple property listing". Once an individual property or a group of properties is nominated and listed in the National Register,

4131-543: The group of properties to be included in the National Register. The process begins with the multiple property documentation form which acts as a cover document rather than the nomination to the National Register of Historic Places. The purpose of the documentation form is to establish the basis of eligibility for related properties. The information of the multiple property documentation form can be used to nominate and register related historic properties simultaneously, or to establish criteria for properties that may be nominated in

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4212-573: The height of the Aurora Bridge eliminated the need for a drawbridge . In 1930 Seattle City Council voted to build connecting portions of the highway through the Woodland Park Zoo , a decision which generated considerable controversy at the time. The bridge was designed by the Seattle architectural firm Jacobs & Ober, with Ralph Ober as the lead engineer on the project. Ober died in August 1931, of

4293-475: The last fifty years, rural historic landscapes, traditional cultural properties and vessels and shipwrecks. Properties are not protected in any strict sense by the Federal listing. States and local zoning bodies may or may not choose to protect listed historic places. Indirect protection is possible, by state and local regulations on the development of National Register properties and by tax incentives. By contrast,

4374-783: The multiple property documentation form, combined with the individual National Register of Historic Places nomination forms, constitute a multiple property submission. Examples of MPS include the Lee County Multiple Property Submission , the Warehouses in Omaha , the Boundary Markers of the Original District of Columbia and the Illinois Carnegie Libraries . Before the term "Multiple Property Submission"

4455-764: The nine buildings included in the University of Connecticut Historic District in Storrs, Connecticut (listed in 1989, demolished in 2017), and the Terrell Jacobs Circus Winter Quarters in Peru, Indiana (listed in 2012, demolished in 2021). In France , designation of monument historique is similar to NRHP listing. In the French program, however, permanent restrictions are imposed upon designated monuments, for example requiring advance approval for any renovation of

4536-535: The nominating individual or group. After preliminary review, the SHPO sends each nomination to the state's historic review commission, which then recommends whether the State Historic Preservation Officer should send the nomination to the Keeper of the National Register . For any non-Federally owned property, only the State Historic Preservation Officer may officially nominate a property for inclusion in

4617-639: The nomination. Each nomination contains a narrative section that provides a detailed physical description of the property and justifies why it is significant historically with regard either to local, state, or national history. The four National Register of Historic Places criteria are the following: The criteria are applied differently for different types of properties; for instance, maritime properties have application guidelines different from those of buildings. The National Park Service names seven categories of properties that "are not usually considered for" and "ordinarily ... shall not be considered eligible for"

4698-403: The now-defunct Save America's Treasures grants, which apply specifically to properties entered in the Register with national significance or designated as National Historic Landmarks . The NHPA did not distinguish between properties listed in the National Register of Historic Places and those designated as National Historic Landmarks concerning qualification for tax incentives or grants. This

4779-458: The preservation of income-producing historic properties. The National Park Service was given the responsibility to ensure that only rehabilitations that preserved the historic character of a building would qualify for federal tax incentives. A qualifying rehabilitation is one that the NPS deems consistent with the Secretary of the Interior's Standards for Rehabilitation. Properties and sites listed in

4860-758: The properties that were demolished or otherwise destroyed after their listing are the Jobbers Canyon Historic District in Omaha, Nebraska (listed in 1979, demolished in 1989), Pan-Pacific Auditorium in Los Angeles, California (listed in 1978, destroyed in a fire in 1989), Palace Amusements in Asbury Park, New Jersey (listed in 2000, demolished in 2004), The Balinese Room in Galveston, Texas (listed in 1997, destroyed by Hurricane Ike in 2008), seven of

4941-475: The property is not guaranteed. During the nomination process, the property is evaluated in terms of the four criteria for inclusion on the National Register of Historic Places. The application of those criteria has been the subject of criticism by academics of history and preservation, as well as the public and politicians. A property listed in the National Register, or located within a National Register Historic District , may qualify for tax incentives derived from

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5022-498: The property more than a National Register listing does. The Department of Transportation Act , passed on October 15, 1966, the same day as the National Historic Preservation Act, included provisions that addressed historic preservation. The DOT Act is much more general than Section 106 NHPA in that it refers to properties other than those listed in the Register. The more general language has allowed more properties and parklands to enjoy status as protected areas by this legislation,

5103-463: The region without streetcar tracks. It was accepted to the National Register on July 16, 1982. The bridge formerly had a set of pedestrian refuge islands in the highway's median that were removed in 1944. In 1990 the Fremont Troll —a large concrete sculpture of a troll clutching a real-life Volkswagen Beetle —was installed under the bridge's north end. Up to half of the $ 40,000 cost for the artwork

5184-588: The rehabilitation of the historic structure. The rehabilitation may be of a commercial, industrial, or residential property, for rentals. The tax incentives program is operated by the Federal Historic Preservation Tax Incentives program, which is managed jointly by the National Park Service, individual State Historic Preservation Offices and the Internal Revenue Service . Some property owners may also qualify for grants, like

5265-452: The roadway. Southbound traffic was reduced to two lanes for an emergency repair that cost $ 500,000 and took seven days (out of a scheduled ten days). On November 27, 1998, King County Metro driver Mark McLaughlin, the driver of a southbound route 359 Express articulated bus , was shot and killed by a passenger, Silas Cool, while driving across the bridge. Cool then shot himself as the bus veered across two lanes of traffic and plunged off

5346-578: The same day. A time capsule was installed on the bridge by the widow of Judge Thomas Burke and is planned to be opened in 2032. The bridge was the final link in what was then called the Pacific Highway (later known as U.S. Route 99 ), which ran from Canada to Mexico. The bridge crosses the Lake Union section of the Lake Washington Ship Canal and, unlike earlier bridges across the canal,

5427-503: The service, which included a procession of over eighty Metro buses and vans. Metro retired the number 359 as a route designation and replaced it with route 358 in February 1999, as part of a restructure of service on Aurora Avenue. On February 15, 2014, Route 358 itself was retired, and replaced with the RapidRide E Line . On September 24, 2015, five people were killed and fifty were injured when an amphibious " duck tour " vehicle crashed into

5508-513: The ship canal which serve as the two main supporting anchors. Some 828 timber piles were driven for the foundation of the south anchor and 684 piles for the north. They range in size from 110 to 120 feet (34 to 37 m) and rest 50 to 55 feet (15 to 17 m) below the surface of the water. Together, the anchors support a load of 8,000 tons. Their construction required a pile driver that was specially designed to work underwater. A 150 ft (46 m) long Warren truss suspended span connects

5589-509: The site of numerous fatal incidents over the years. It is a popular location for suicide jumpers and several reports have used the bridge as a case study in fields ranging from suicide prevention to the effects of pre-hospital care on trauma victims. In 1998, a bus driver was shot and killed while driving over the bridge, causing his bus to crash and resulting in the death of one of the passengers. In 2015, five people died and fifty were injured when an amphibious duck tour vehicle crashed into

5670-413: The state of Colorado, for example, does not set any limits on owners of National Register properties. Until 1976, federal tax incentives were virtually non-existent for buildings on the National Register. Before 1976 the federal tax code favored new construction rather than the reuse of existing, sometimes historical, structures. In 1976, the tax code was altered to provide tax incentives that promote

5751-596: The state that used gusset plates in their design, including the George Washington Memorial Bridge. The bridge had earlier been certified as structurally sound with no serious deficiencies detected. That year, the Federal Highway Administration National Bridge Inventory found the bridge to be "functionally obsolete". The bridge was given a sufficiency rating of 55.2% and evaluated to be "better than minimum adequacy to tolerate being left in place as is". Its foundations and railings met

5832-431: The structural principles of the suspended span cantilever by sitting in chairs and supporting their colleague, Kaichi Watanabe , in between them, using just their arms and wooden poles. The suspended span, where Watanabe sits, is in the center. The wooden poles resist the compression of the lower chord , while the outstretched arms support the tension of the upper chord. The placement of the brick counterweights demonstrates

5913-514: The total value of expenses incurred in preserving the property. Properties can be nominated in a variety of forms, including individual properties, historic districts and multiple property submissions (MPS). The Register categorizes general listings into one of five types of properties: district, site, structure, building or object. National Register Historic Districts are defined geographical areas consisting of contributing and non-contributing properties. Some properties are added automatically to

5994-446: The two cantilevers in the middle. The bridge's main span is 475 ft (145 m) long. At either end of the bridge there are additional Warren truss spans which connect the cantilevered spans to the highway. Construction on the bridge piers began in 1929, with construction of the bridge following shortly afterwards in 1931. The bridge's dedication was held on February 22, 1932, George Washington 's 200th birthday; it opened to traffic

6075-418: The use of their property. Some states and municipalities, however, may have laws that become effective when a property is listed in the National Register. If federal money or a federal permitting process is involved, Section 106 of the National Historic Preservation Act of 1966 is invoked. Section 106 requires the federal agency involved to assess the effect of its actions on historic resources. Statutorily,

6156-563: Was 275 feet (84 metres) deep and took full advantage of the fact that falsework, or temporary support, is not needed for the main span of a cantilever bridge. The Forth Bridge is a notable example of an early cantilever bridge. This bridge held the record for longest span in the world for twenty-nine years until it was surpassed by the Quebec Bridge . The engineers responsible for the bridge, Sir Benjamin Baker and Sir John Fowler , demonstrated

6237-530: Was completed in 1867 and is recognized as the first modern cantilever bridge. The High Bridge of Kentucky by C. Shaler Smith (1877), the Niagara Cantilever Bridge by Charles Conrad Schneider (1883) and the Poughkeepsie Bridge by John Francis O'Rourke and Pomeroy P. Dickinson (1889) were all important early uses of the cantilever design. The Kentucky River Bridge spanned a gorge that

6318-423: Was completed. A notable suicide was that of Cheryl Glass , one the first female African-American racing drivers in the United States. Numerous reports have been written about the high incidence of suicide on the bridge, many of them using the bridge as a case study in fields ranging from suicide prevention to the effects of prehospital care on trauma victims. Despite the force of impact, jumpers occasionally survive

6399-496: Was deliberate, as the authors of the act had learned from experience that distinguishing between categories of significance for such incentives caused the lowest category to become expendable. Essentially, this made the Landmarks a kind of "honor roll" of the most significant properties of the National Register of Historic Places. As of 1999, 982 properties have been removed from the Register, most often due to being destroyed. Among

6480-489: Was donated from Seattle's Neighborhood Matching Fund, a local program to raise money for community projects. The Troll was heavily vandalized in the year following its construction, and large floodlights were installed on the bridge to discourage further damage. Following the collapse of the Minneapolis I-35W arch-truss bridge on August 1, 2007, WSDOT was directed to perform inspections of all steel cantilever bridges in

6561-650: Was introduced in 1984, such listings were known as "Thematic Resources", such as the Operating Passenger Railroad Stations Thematic Resource , or "Multiple Resource Areas". A listing on the National Register of Historic Places is governmental acknowledgment of a historic district, site, building, or property. However, the Register is mostly "an honorary status with some federal financial incentives". The National Register of Historic Places automatically includes all National Historic Landmarks as well as all historic areas administered by

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