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John O'Connell Bridge
The John O'Connell Bridge is a cable-stayed bridge over the Sitka Channel located in Sitka, Alaska. The bridge connects the town of Sitka on Baranof Island to the airport and Coast Guard Station on Japonski Island. Until the bridge was completed in 1971, the commute was only achievable through a ferry service. The bridge is named after John W. O'Connell, a former mayor of Sitka. The two-lane bridge is in total length, with a main span of . The bridge was also the United States' first vehicular cable-stayed girder spanned bridge. The four steel pylons carry two three-cable sets, each carrying a section of the bridge deck. Special consideration was given to the bridge's aesthetics due to its proximity to nearby Castle Hill. Approximately 4000 vehicles cross the bridge every day, up from the approximate 1000 shore boat passengers per day prior to the bridge's completion. A man from Bellingham, Washington, died in August 2015 after jumping off the bridge to swim ashore. The b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sitka Channel
The Sitka Channel is a strait that separates Japonski Island from Baranof Island in Alaska. The Sitka Channel, or more commonly referred to as simply The Channel by locals, is a notable feature of Sitka, Alaska that separates vital portions of infrastructure located on the peripheral Japonski Island from the rest of the community. Until 1972 the commute was only achievable through a schedule of shore boats that carried an estimated 1,000 people a day for 26 years. The ferries were retired when the John O'Connell Bridge was constructed (named after John W. O'Connell, a former mayor of Sitka). The Sitka Channel features numerous wharfs, piers, seafood processing plants, and harbors serving its thriving seafood industries as well as port facilities for the United States Coast Guard The United States Coast Guard (USCG) is the maritime security, search and rescue, and Admiralty law, law enforcement military branch, service branch of the armed forces of the United States. It is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Captain William Moore Bridge
The Captain William Moore Bridge is an historic asymmetric single-pylon cable-stayed bridge on the Klondike Highway that spans the Moore Creek Gorge in the borough of Skagway, Alaska, United States, about north of the city of Skagway. Before the bridge was built in 1976, Whitehorse, Yukon, was only accessible from Skagway by the White Pass and Yukon Route railroad. The bridge connects Skagway to the Yukon highway network and allows traffic to pass over the Moore Creek Gorge, which flows along a fault line. To minimize bridge damage from earthquake movements along the fault line, the bridge was designed with anchors only at one end, which in this case was the south bank. Over the decades, heavy ore truck traffic weakened the bridge. In 2019 a replacement buried bridge located 150 feet west of the historic bridge was opened, and the 1976 cable-stayed bridge was repurposed as a pedestrian viewpoint and wayside historic attraction. Design Designed in 1974 by the engineers in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Girder Bridges In The United States
A girder () is a Beam (structure), beam used in construction. It is the main horizontal support of a structure which supports smaller beams. Girders often have an I-beam cross section composed of two load-bearing ''flanges'' separated by a stabilizing ''web'', but may also have a box girder, box shape, Z shape, or other forms. Girders are commonly used to build bridges. A girt is a vertically aligned girder placed to resist shear loads. Small steel girders are Rolling (metalworking), rolled into shape. Larger girders (1 m/3 feet deep or more) are made as plate girders, welded or bolted together from separate pieces of steel plate. The Warren truss, Warren type girder replaces the solid web with an open latticework truss between the flanges. This arrangement combines strength with economy of materials, minimizing weight and thereby reducing loads and expense. Patented in 1848 by its designers James Warren (engineer), James Warren and Willoughby Theobald Monzani, its st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steel Bridges In The United States
Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron. Due to steel's high elastic modulus, yield strength, fracture strength and low raw material cost, steel is one of the most commonly manufactured materials in the world. Steel is used in structures (as concrete reinforcing rods), in bridges, infrastructure, tools, ships, trains, cars, bicycles, machines, electrical appliances, furniture, and weapons. Iron is always the main element in steel, but other elements are used to produce various grades of steel demonstrating altered material, mechanical, and microstructural properties. Stainless steels, for example, typically contain 18% chromium and exhibit improved corrosion and oxidation resistance versus its carbon steel counterpart. Under atmospheric pressures, steels generally take on two crystalline forms: body-centered cubic and face-centered cubic, however depending on the thermal history and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Bridges In Alaska
A road is a thoroughfare used primarily for movement of traffic. Roads differ from streets, whose primary use is local access. They also differ from stroads, which combine the features of streets and roads. Most modern roads are paved. The words "road" and "street" are commonly considered to be interchangeable, but the distinction is important in urban design. There are many types of roads, including parkways, avenues, controlled-access highways (freeways, motorways, and expressways), tollways, interstates, highways, and local roads. The primary features of roads include lanes, sidewalks (pavement), roadways (carriageways), medians, shoulders, verges, bike paths (cycle paths), and shared-use paths. Definitions Historically, many roads were simply recognizable routes without any formal construction or some maintenance. The Organization for Economic Co-operation and Development (OECD) defines a road as "a line of communication (travelled way) using a stabilized base other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridges Completed In 1972
A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it. The earliest bridges were likely made with fallen trees and stepping stones. The Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge, dating from the 13th century BC, in the Peloponnese is one of the oldest arch bridges in existence and use. Etymology The ''Oxford English Dictionary'' traces the origin of the word ''bridge' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buildings And Structures In Sitka, Alaska
A building or edifice is an enclosed structure with a roof, walls and windows, usually standing permanently in one place, such as a house or factory. Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for numerous factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and aesthetic reasons. To better understand the concept, see ''Nonbuilding structure'' for contrast. Buildings serve several societal needs – occupancy, primarily as shelter from weather, security, living space, privacy, to store belongings, and to comfortably live and work. A building as a shelter represents a physical separation of the human habitat (a place of comfort and safety) from the ''outside'' (a place that may be harsh and harmful at times). buildings have been objects or canvasses of much artistic expression. In recent years, interest in sustainable planning and building practi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Bridges Documented By The Historic American Engineering Record In Alaska
__NOTOC__ This is a list of bridges documented by the Historic American Engineering Record in the US state of Alaska. Bridges References {{HAER list, structure=bridge Bridges in Alaska, *List Historic American Engineering Record in Alaska, *List Lists of bridges documented by the Historic American Engineering Record, Alaska Lists of buildings and structures in Alaska, Bridges, HAER Alaska transportation-related lists, Bridges, HAER Alaska history-related lists, Bridges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cantilever Spar Cable-stayed Bridge
A cantilever spar cable-stayed bridge is a modern variation of the cable-stayed bridge. This design has been pioneered by the structural engineer Santiago Calatrava in 1992 with the Puente del Alamillo in Seville, Spain. In two of his designs the force distribution does not depend solely upon the cantilever action of the spar (pylon); the angle of the spar away from the bridge and the weight distribution in the spar serve to reduce the overturning forces applied to the footing of the spar. In contrast, in his swinging Puente de la Mujer design (2002), the spar reaches toward the cable supported deck and is counterbalanced by a structural tail. In the Assut de l'Or Bridge (2008), the curved backward pylon is back-stayed to concrete counterweights. Of this type by Santiago Calatrava * Puente del Alamillo, Seville, Spain, 1992 (backward cantilever) * Trinity Bridge, Manchester, United Kingdom, 1995 (backward cantilever) * Puente de la Mujer, Buenos Aires, Argentina, 2002 (forw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Society Of Civil Engineers
The American Society of Civil Engineers (ASCE) is a tax-exempt professional body founded in 1852 to represent members of the civil engineering profession worldwide. Headquartered in Reston, Virginia, it is the oldest national engineering society in the United States. Its constitution was based on the older Boston Society of Civil Engineers from 1848. ASCE is dedicated to the advancement of the science and profession of civil engineering and the enhancement of human welfare through the activities of society members. It has more than 143,000 members in 177 countries. Its mission is to provide essential value to members, their careers, partners, and the public; facilitate the advancement of technology; encourage and provide the tools for lifelong learning; promote professionalism and the profession; develop and support civil engineers. History The first serious and documented attempts to organize civil engineers as a professional society in the newly created United States were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sitka, Alaska
Sitka (; ) is a municipal home rule, unified Consolidated city-county, city-borough in the southeast portion of the U.S. state of Alaska. It was under Russian America, Russian rule from 1799 to 1867. The city is situated on the west side of Baranof Island and the south half of Chichagof Island in the Alexander Archipelago of the Pacific Ocean (part of the Alaska Panhandle). As of the 2020 United States census, 2020 census, Sitka had a population of 8,458, making it the List of cities in Alaska, fifth-most populated city in the state. With a consolidated land area of and total area (including water) of , Sitka is the List of United States cities by area, largest city by total area in the U.S. History As part of Russian America, Russia, it was known as New Archangel (). The current name ''Sitka'' (derived from ', a contraction of the Tlingit language, Tlingit ') means "People on the Outside of Baranof Island", whose Tlingit name is ' (here contracted to '). Russian America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bellingham, Washington
Bellingham ( ) is the county seat of Whatcom County, Washington, Whatcom County in the U.S. state of Washington (state), Washington. It lies south of the Canada–United States border, U.S.–Canada border, between Vancouver, British Columbia, to the northwest and Seattle to the south. The population was 91,482 at the 2020 United States census, 2020 census, and estimated to be 94,720 in 2023. It is the site of Western Washington University, Bellingham International Airport, and the southern terminus of the Alaska Marine Highway. Bellingham is the northernmost city with a population of more than 90,000 people in the contiguous United States. The area around Bellingham Bay, named in 1792 by George Vancouver, is the ancestral home of several Coast Salish groups. European settlement in modern-day Bellingham began in the 1850s and several coal mining towns grew in later years. The city of Bellingham was municipal incorporation, incorporated in 1903 through the consolidation of se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
