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Topic: Bridges in the United States

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Suspension bridge

	PUBLIC ROADS On-Line (Winter 1997) - Timber Bridges in the United States
		One focus of modern timber bridges is the use of previously rarely used species that are native to the particular region of the United States and generally yield smaller sizes and lower grades of lumber.
		The development and use of iron in these bridges soon led to the use of iron lower chords and other components, and this was followed by the combination bridges consisting of iron diagonals and lower chords with timber used as compression members.
		Timber bridges built on the National Highway System (NHS) must conform to AASHTO standards for highway bridges, but bridges not on the NHS may be designed in accordance with the standards of the applicable state.
	www.tfhrc.gov /pubrds/winter97/p97wi32.htm (4692 words)

	Politics of the United States - Wikipedia, the free encyclopedia
		Politics of the United States of America takes place in a framework of a federal presidential representative democratic republic, whereby the President of the United States is both head of state and head of government, and of a pluriform multi-party system.
		Its structure is similar to that of the state and national governments, with an elected mayor as chief of the executive branch and an elected council that represents the various neighborhoods forming the legislative branch.
		State legislators began to enact tough laws that made it harder for minor political parties to run candidates for office by requiring a high number of petition signatures from citizens and decreasing the length of time that such a petition could legally be circulated.
	en.wikipedia.org /wiki/Politics_of_the_United_States (5370 words)

	List of bridges in the United States - Wikipedia, the free encyclopedia
		Bridges in the United States is a link page for any notable bridge in the United States of America.
		The Dalles Bridge, The Dalles to Dallesport, Washington
		The Dalles Bridge, Dallesport to The Dalles, Oregon
	en.wikipedia.org /wiki/Bridges_in_the_United_States (849 words)

	Bridges v. United States
		Bridges died on April 6, 1962, His will left an individual one-half interest in the timberlands to his wife, and an individual one-eighth interest to each of his four children.
		Bridges engaged in good forestry practices, his properties were awarded the honorary title of "tree farm" by the American Forestry Association.
		During the calendar years 1964, 1965, and 1966, Addie Belle Bridges had a 170.5/683 interest in the timber tracts in Florida and Georgia subject to the lease agreement and the timber cutting contract and the remaining 512.5/683 interest was equally divided among J. Bridges, Jr., Janice B. Brooks, Virginia R. Chandler, and Marilyn B. Sabin.
	www.timbertax.org /research/caselaw/cc/B/bridges.htm (7037 words)

	Category:Bridges in the United States - Biocrawler
		This category includes articles on individual bridges found within the United States, subcategorized by the state in which it is located.
		Bridges that connect states may be found in either subcategory.
		Articles in category "Bridges in the United States"
	www.biocrawler.com /encyclopedia/Category:Bridges_in_the_United_States (57 words)

	LENTICULAR TRUSS BRIDGES IN MASSACHUSETTS
		These bridges are sometimes referred to as "pumpkin-seed bridges", "cats-eyes bridges", "elliptical truss bridges", or "parabolic truss bridges" because of their unique lense shape.
		Lenticular bridges were only used for vehicular traffic and were generally considered too light to be used for railroad and trolley loads.
		The bridge is a typical example of a Berlin Iron Bridge Co. Lenticular Pony Truss.
	www.ecs.umass.edu /cee/cee_web/bridge/1.html (615 words)

	Historic Bridges of the United States
		This is a database of historic bridges in the United States of America, past and present.
		The Judsonia Bridge in Arkansas was closed on Oct. 5 after it failed an inspection.
		The bridge has rapidly deteriorated to the point where it is only open to one-lane traffic (controlled by stoplights) and the highway department is seriously thinking about an emergency replacement plan: demolish the trusses and build a new deck on the existing piers.
	bridges.midwestplaces.com (1767 words)

	Covered Bridges - Tennessee Department of Transportation
		Palmer was one of the first builders in the United States to promote covering the wooden truss (the load bearing portion of the bridge) with a barn-like structure.
		Noted engineer Henry Tyrrell stated in 1909 that the normal life span of a covered wooden truss bridge was thirty to forty years while an uncovered bridge might last one-third as long (Tyrrell 1911:121).
		Even though builders erected a small number of wooden truss bridges into the twentieth century, beginning in the mid-nineteenth century, evolving designs in metal eventually eclipsed the use of wooden truss bridges and rendered them virtually obsolete by the end of the nineteenth century.
	www.tdot.state.tn.us /bridges/historybridges.htm (1133 words)

	NCHRP Web Document 15: Durability of Precast Segmental Bridges
		It was determined that the corrosion problems with precast segmental and post-tensioned bridges in the United Kingdom were principally due to poor design choices and poor quality construction rather than a significant intrinsic susceptibility to corrosion.
		Although reported problems have been few, especially in the United States, it is important to keep in perspective that there has not been exhaustive field investigation of the corrosion performance of precast segmental bridges; most of the reported information is based on simple visual inspection.
		Also, a reasonably comprehensive field testing and evaluation study should be conducted on a few of the oldest segmental bridges in the United States that are exposed to a corrosive environment to gain additional insight into the performance and long-term durability of precast segmental bridges that heretofore has mostly been garnered by visual inspection.
	www.nap.edu /readingroom/books/NCHRP15/front.html (972 words)

	WSDOT - Tacoma Narrows Bridge: Extreme History
		The bridge became famous as "the most dramatic failure in bridge engineering history." Now, it's also "one of the world's largest man-made reefs." The sunken remains of Galloping Gertie were placed on the National Register of Historic Places in 1992 to protect her from salvagers.
		The current bridge is the 5th longest suspension bridge in the United States.
		In 1998 the public was asked, "Should the Tacoma Narrows Bridge be modified and a parallel bridge constructed, financed by tolls on bridge traffic and operated as a public-private partnership?" A majority of the voters answered "Yes." Since then, WSDOT and Tacoma Narrows Contractors (TNC) have been developing plans for the new bridge.
	www.wsdot.wa.gov /TNBhistory (616 words)

	Princeton University Senior Theses brief display
		Awad, Sherene Walid (2005): All For One: The United States and the Suez Crisis of 1956.
		Bramhall, Jr., Jacques (1939): The United States and the Manchurian Controversy.
		Harris, Lewis Thompson (1950): The Ratification of the Constitution of the United States by Pennsylvania.
	libweb5.princeton.edu /theses/thesesvw.asp?Lname=&Fname=&Submit=Search&Title1=united&Title2=states&department=&Class=&Adviser= (14161 words)

	57th. St. / Kalamazoo River
		This is one of Michigan's oldest metal truss highway bridge and the largest by far in overall length of Michigan's pony truss highway bridges.
		The bridge's chief importance, however, is that it is one of the oldest – if not the oldest – surviving highway swing bridges in the United States.
		The erection of the bridge generated considerable local controversy, as residents opposing to the high cost of an iron structure attempted to halt construction by dislodging piles.
	www.michigan.gov /mdot/0,1607,7-151-9620_11154_11188-25598--,00.html (168 words)

	Bridges in the United States quiz -- free game
		This bridge traverses the Niagara River at Buffalo.
		This bridge traverses the Columbia River at Astoria.
		This bridge traverses the Potomac River at south of Washington DC.
	www.funtrivia.com /playquiz.cfm?qid=143479 (124 words)

	Bridgebuilders - Wood bridges, and alternative material.
		One-third of the area of the United States is forest land.
		Of the bridges in the United States with spans longer than 20 feet, approximately 12 percent of them, or 71,200 bridges, are made of timber.
		In modern applications, it is seldom practical or economical to cover bridges; however, the use of wood preservatives has extended the life of wood used in exposed bridge applications.
	www.bridgebuilders.com /Timber_Bridges.html (672 words)

	Famous Bridges in the United States - Associated Content
		This suspension bridge was completed in 1937, and connects the city of San Francisco to the city of Sausalito, California.
		The Brooklyn Bridge, located over the East River, runs from Manhattan Street to Adams Street is known as a cultural icon, and it is a famous landmark.
		The bridge was designed in 1867, and is adorned with gothic towers constructed entirely of granite.
	www.associatedcontent.com /article/26426/famous_bridges_in_the_united_states.html (465 words)

	Structurally Deficient Bridges in the United States
		The tragic collapse of the I-35W Interstate bridge in Minneapolis demonstrated in the starkest possible terms the true cost of our nation’s under-investment in the maintenance of essential transportation infrastructure.
		In my own State of Maryland, 382 bridges out of the 4,889 total bridges in the State are structurally deficient.
		47 of the structurally deficient bridges in the State are on the National Highway System, of which at least 6 are located in my District according to the Federal Highway Administration.
	www.house.gov /cummings/speech/sp090507.htm (520 words)

	Rapid-Estimation Method
		Scour at highway bridges involves sediment-transport and erosion processes that cause streambed material to be removed from the bridge vicinity and generally is separated into components of pier scour, abutment scour, and contraction scour.
		Given that almost 485,000 bridges in the United States are over waterways and may be susceptible to scour to some degree, a detailed scour analysis at all sites may not be feasible.
		3) is used to estimate velocity at the bridge from unit discharge, and a second graph (fig.
	pubs.usgs.gov /fs/FS-244-96 (1611 words)

	Untitled Document
		It is one of most useful transportation modes there is. There are different types of bridges across the United States.
		Engineers must consider many things when building bridges, like the distance to be spanned and the types of materials available before determining the size, shape, and overall look of a bridge.
		The bridge consists of a horizontal beam that is supported at each end by piers.
	www.mediaworkshop.org /ashs/malave/science1.html (223 words)

	East and West Paden Twin Bridges Covered Bridge Fishing Creek Township Pennsylvania Pennsylvania Covered Bridges
		East and West Paden -or The Twin Bridges- The only twin covered bridges in the United States, are located on Huntington Creek in Fishing Creek Township, Columbia County, east of Forks, off 1020, east of Pa. Rte.
		The bridges are located in a park and preserved thanks to the planning of the Columbia County Commissioners, organizations and other concerned citizens of Columbia County.
		Of their many historical attributes, probably the most prominent are the existence of the twenty-four nineteenth century covered bridges, and one twentieth century covered bridge.
	www.bentonrodeo.com /twin.html (221 words)

	HAERnet-Pennsylvania Historic Bridges-II (Site not responding. Last check: )
		Pennsylvania Historic Bridges - II This project was a continuation of HAER's award-winning historic bridges program, a national effort to document outstanding bridges of the United States before they are destroyed or decay.
		The bridges selected have significant technological, economic, and cultural value to their home state, and in some instances, the entire nation.
		The team recorded 21 bridges and the Phoenix Iron Company, selected by historic bridge experts from the Commonwealth of Pennsylvania and HAER staff.
	www.cr.nps.gov /habshaer/haer/1998proj/penn2.htm (143 words)

	Bridges
		The Humphrey bridge was constructed during the summer and fall of 1993 in Cattaraugus County, New York.
		One of the main objectives of this project was to investigate the feasibility of using FRP decks for highway bridges.
		These Standard Specifications for the Construction of Roads and Bridges on Federal Highway Projects are issued primarily for constructing roads and bridges on Federal Highway projects under the direct administration of the Federal Highway Administration.
	ttap.colostate.edu /publications.cfm?parentcat=Bridges (1568 words)

	Appointments, November 14, 1984 (Site not responding. Last check: )
		Bridges served in the United States Army in 1955 - 1957.
		In the Department of State he was Director of the Office of United Nations Political Affairs (1978 - 1980) and Director of the Office of Eastern European Affairs (1980 - 1981).
		The President today announced his intention to appoint Holly H. Coors to be a member of the Board of Visitors of the United States Air Force Academy for a term expiring December 30, 1986.
	www.reagan.utexas.edu /archives/speeches/1984/111484b.htm (403 words)

	HAER: Pennsylvania Historic Bridges Recording Project-I, (Site not responding. Last check: )
		Beginning in 1975, HAER began a concerted effort to sensitize preservationists, engineers, federal officials, state DoTs, and the general public to appreciate the significance old bridges have for American technological history and the cultural landscape, and to capture them visually and verbally before all evidence disappeared.
		Bridges dating from the last half of the 19th and first quarter of the 20th century were threatened by massive state and federal programs to upgrade the primary and secondary road system of the United States.
		Beginning in 1986, HAER has been working with state departments of transportation, the Federal Highway Administration, and preservation officials to document the outstanding bridges identified by the inventories for the national collection at the Library of Congress.
	www.cr.nps.gov /habshaer/haer/proj97/phbrp.htm (224 words)

	Neither Steel Nor Concrete
		While 94 percent of the bridges in the United States are built from concrete or steel, they aren’t your only choices.
		A timber bridge that is properly designed and constructed can carry the same load as a steel or concrete bridge.
		Many bridge projects that use FRP composites are funded through FHWA’s Innovative Bridge Research and Construction Program, which has given out grants to over 150 projects that advance the use of this new material.
	www.fisherassoc.com /news.php?id=12 (303 words)

	Hotels United States - Motels United States - Rooms United States - Bed & Breakfast United States
		HOTELS United states : A hotel is an establishment that provides paid lodging, usually on a short-term basis.
		On the left side you can see a place to visit in United states and on the right side you found a map of United states, we suggest you to visit this country with your parents or friends.
		United states : Please choose a city to view hotels - accomodations - lodging - rooms or tourism on next page.
	www.risposteatutto.com /hotels/59cn-1-united_states.html (439 words)

	Famous Bridges--Physical Science/Technology lesson plan (grades 6-8)--DiscoverySchool.com (Site not responding. Last check: )
		Ask students to construct a bridge between the backs of two chairs that are approximately 2 feet apart.
		The bridge must be able to handle the weight of a model car or a tennis ball rolling across it.
		The history of bridges and bridge-making is presented through color photographs and explanatory text, from the earliest Roman bridges to the most recent suspension types, from covered bridges on back-country roads to huge iron railroad trestles.
	school.discovery.com /lessonplans/programs/famousbridges (1721 words)

	Stepping into Yesterday - Bridges in Vermont pictures on Worldisround
		Bridges in Vermont - travel photos - There are many covered bridges in the United States.
		There are many covered bridges in the United States.
		The map is pretty accurate, but not always right on the money with the mileage between, so don/t give up hope if you don/t see the next one when it says you should.
	www.worldisround.com /articles/6503/text.html (260 words)

	On Campus: Queen Noor Bridges the United States and Arab World
		Born in the United States to an Arab-American family, Queen Noor in 1978 married King Hussein, who was considered a moderate voice in the Middle East until he died in 1999.
		Justice must precede peace, she said, noting that she has worked in partnerships with various United Nations groups for a quarter of a century to reduce poverty, increase educational opportunities, and promote a sustainable environment in Third World countries.
		Half of all Arab women are illiterate and consequently suffer from social, legal, and economic discrimination, she said.
	www.trinity.edu /departments/public_relations/on_campus/queen_noor (492 words)

	Cantilever Bridges
		Cantilever bridges are a modified form of beam bridge, with the support being placed not at the end, but somewhere in the middle of the span.
		As with other major bridge construction, Native Americans participated in the building of this bridge, in particular, members of the Kahnawake Mohawk Tribe.
		The bridge was built between 1930 and 1932 and was named "Most Beautiful Steel Structure" for 1932 by the American Institute of Steel Construction.
	www.richmangalleries.com /cantilever_bridges.htm (206 words)

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