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Puente De Trujillo Alto
The Puente de Trujillo Alto is a Pennsylvania through truss bridge built during 1939–1941 in Puerto Rico in the Trujillo Alto municipality of Puerto Rico. At was the longest single-span bridge in Puerto Rico. The bridge construction was funded as part of the New Deal. The supporting structures and bridge were built by Robert Prann, an engineer who established private practice in Puerto Rico, with steel components manufactured by U.S. Steel. Crossing above, it spans the Río Grande de Loíza The Rio Grande de Loíza (English: ''Great River of Loíza'', ''Grande de Loíza'', or just ''Loíza River'') is a river in the island of Puerto Rico. It is the largest river in Puerto Rico by discharge volume. It is situated on the north coast of ..., the largest river by volume in Puerto Rico. The height was intended to keep this bridge above flooding that had destroyed a previous bridge in 1936. However, in 1945 even this bridge was flooded over and almost carried away. A four-l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trujillo Alto, Puerto Rico
Trujillo Alto (, ) is a town and municipality of Puerto Rico located in the Northern Coastal Plain, on the boundary between the karst zone and Sierra de Luquillo, north of Caguas, and Gurabo; southeast of San Juan, and west of Carolina. Trujillo Alto is part of the San Juan Metropolitan Area, which includes the municipalities of Bayamón, Guaynabo, Cataño, and Toa Baja. The city is spread over 6 barrios and Trujillo Alto Pueblo (the downtown area and the administrative center of the city). It is part of the San Juan-Caguas-Guaynabo Metropolitan Statistical Area. Trujillo Alto was officially founded in 1801, but gained more importance during the 20th century. Due to its proximity to the capital, San Juan, the city has become a suburb of the metropolitan area, which has sparked its growth during recent years. The population of Trujillo Alto has increased through the last century from 9,576 (1930) to 74,482 (2010). According to the 2010 Census, it is Puerto Rico's tenth-mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Through Truss
A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or sometimes both in response to dynamic loads. The basic types of truss bridges shown in this article have simple designs which could be easily analyzed by 19th and early 20th-century engineers. A truss bridge is economical to construct because it uses materials efficiently. Design The nature of a truss allows the analysis of its structure using a few assumptions and the application of Newton's laws of motion according to the branch of physics known as statics. For purposes of analysis, trusses are assumed to be pin jointed where the straight components meet, meaning that taken alone, every joint on the structure is functionally considered to be a flexible joint as opposed to a rigid joint with strength to maintain its own shape, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puerto Rico Register Of Historic Sites And Zones
The Puerto Rico Register of Historic Sites and Zones (Spanish language, Spanish: ''Registro Nacional de Sitios y Zonas Históricas'') is a Government of Puerto Rico, Puerto Rican government program adopted by the state Puerto Rico Planning Board, Planning Board (''Junta de Planificación'') for use by both private and public entities to evaluate, register, revitalize, develop or protect the built historic and cultural heritage of Puerto Rico in the context and for economic planning and land use zoning. There is an overlap between the Register of Historic Sites and Zones and the federal National Register of Historic Places listings in Puerto Rico, National Register of Historic Places (''Registro Nacional de Lugares Históricos''), however, properties can be listed in the former and not in the latter and vice versa. Properties inscribed in the register can be either individual sites or historic districts (''zonas históricas'') consisting of multiple structures, buildings, and sites. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puerto Rico
Puerto Rico (; abbreviated PR; tnq, Boriken, ''Borinquen''), officially the Commonwealth of Puerto Rico ( es, link=yes, Estado Libre Asociado de Puerto Rico, lit=Free Associated State of Puerto Rico), is a Caribbean island and Unincorporated territories of the United States, unincorporated territory of the United States. It is located in the northeast Caribbean Sea, approximately southeast of Miami, Florida, between the Dominican Republic and the United States Virgin Islands, U.S. Virgin Islands, and includes the eponymous main island and several smaller islands, such as Isla de Mona, Mona, Culebra, Puerto Rico, Culebra, and Vieques, Puerto Rico, Vieques. It has roughly 3.2 million residents, and its Capital city, capital and Municipalities of Puerto Rico, most populous city is San Juan, Puerto Rico, San Juan. Spanish language, Spanish and English language, English are the official languages of the executive branch of government, though Spanish predominates. Puerto Rico ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Park Service
The National Park Service (NPS) is an agency of the United States federal government within the U.S. Department of the Interior that manages all national parks, most national monuments, and other natural, historical, and recreational properties with various title designations. The U.S. Congress created the agency on August 25, 1916, through the National Park Service Organic Act. It is headquartered in Washington, D.C., within the main headquarters of the Department of the Interior. The NPS employs approximately 20,000 people in 423 individual units covering over 85 million acres in all 50 states, the District of Columbia, and US territories. As of 2019, they had more than 279,000 volunteers. The agency is charged with a dual role of preserving the ecological and historical integrity of the places entrusted to its management while also making them available and accessible for public use and enjoyment. History Yellowstone National Park was created as the first national par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Deal
The New Deal was a series of programs, public work projects, financial reforms, and regulations enacted by President Franklin D. Roosevelt in the United States between 1933 and 1939. Major federal programs agencies included the Civilian Conservation Corps (CCC), the Works Progress Administration (WPA), the Civil Works Administration (CWA), the Farm Security Administration (FSA), the National Industrial Recovery Act of 1933 (NIRA) and the Social Security Administration (SSA). They provided support for farmers, the unemployed, youth, and the elderly. The New Deal included new constraints and safeguards on the banking industry and efforts to re-inflate the economy after prices had fallen sharply. New Deal programs included both laws passed by Congress as well as presidential executive orders during the first term of the presidency of Franklin D. Roosevelt. The programs focused on what historians refer to as the "3 R's": relief for the unemployed and for the poor, recovery of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Governor Of Puerto Rico
The governor of Puerto Rico ( es, gobernador de Puerto Rico) is the head of government of the Commonwealth (U.S. insular area), Commonwealth of Puerto Rico, and commander-in-chief of the Puerto Rico National Guard. The governor has a duty to enforce Law of Puerto Rico, local laws, to convention (meeting), convene the Legislative Assembly of Puerto Rico, Legislative Assembly, the power to either sign into law, approve or veto bill (proposed law), bills passed by the Legislative Assembly, to appoint government officers, to appoint List of Justices of the Supreme Court of Puerto Rico by court, justices, and to grant pardons. Since 1948, the governor has been elected by Puerto Rican people, the people of Puerto Rico. Prior to that, the governor was appointed either by the king of Spain (1510–1898) or the president of the United States (1898–1948). Article Four of the Constitution of Puerto Rico, Article IV of the Constitution of Puerto Rico vests the executive power on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Historic Preservation Office
The State Historic Preservation Office (SHPO) is a state governmental function created by the United States federal government in 1966 under Section 101 of the National Historic Preservation Act (NHPA). The purposes of a SHPO include surveying and recognizing historic properties, reviewing nominations for properties to be included in the National Register of Historic Places, reviewing undertakings for the impact on the properties as well as supporting federal organizations, state and local governments, and private sector. States are responsible for setting up their own SHPO; therefore, each SHPO varies slightly on rules and regulations. To link these differences with the SHPOs, the National Conference of State Historic Preservation Officers (NCSHPO) was created as a “point of contact” according to the National Historic Preservation Act. History In 1966, the National Historic Preservation Act (NHPA) was put into effect. As part of the Congressional Act, Section 101 implemente ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Río Grande De Loíza
The Rio Grande de Loíza (English: ''Great River of Loíza'', ''Grande de Loíza'', or just ''Loíza River'') is a river in the island of Puerto Rico. It is the largest river in Puerto Rico by discharge volume. It is situated on the north coast of the island. It flows from south to north and drains into the Atlantic Ocean, a few miles east of San Juan. ''Rio Grande de Loíza'' runs for approximately . It has its origin in the municipality of San Lorenzo at an altitude of approximately above sea level. It runs through the municipalities of San Lorenzo, Caguas, Gurabo, Trujillo Alto, Carolina, Canóvanas and Loíza, forming the Loíza Lake along its route, making it the second longest river on the island, behind Río de la Plata. Geography The Rio Grande de Loíza basin is the largest in Puerto Rico with an area of 289.9 square miles. The source of the river is located in the Espino barrio of San Lorenzo, Puerto Rico on the eastern slopes of the Sierra de Cayey mountain ran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Bridges On The National Register Of Historic Places In Puerto Rico
A road is a linear way for the conveyance of traffic that mostly has an improved surface for use by vehicles (motorized and non-motorized) and pedestrians. Unlike streets, the main function of roads is transportation. There are many types of roads, including parkways, avenues, controlled-access highways (freeways, motorways, and expressways), tollways, interstates, highways, thoroughfares, 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 than rails or air strips open to public traffic, primarily for the use of road motor vehicles running on their own wheels" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridges Completed In 1941
A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way 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, and 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 still in existence and use. Etymology The '' Oxford English Dictionary'' traces the origin of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steel Bridges
Steel is an alloy made up of iron with added carbon to improve its strength and fracture resistance compared to other forms of iron. Many other elements may be present or added. Stainless steels that are corrosion- and oxidation-resistant typically need an additional 11% chromium. Because of its high tensile strength and low cost, steel is used in buildings, infrastructure, tools, ships, trains, cars, machines, electrical appliances, weapons, and rockets. Iron is the base metal of steel. Depending on the temperature, it can take two crystalline forms (allotropic forms): body-centred cubic and face-centred cubic. The interaction of the allotropes of iron with the alloying elements, primarily carbon, gives steel and cast iron their range of unique properties. In pure iron, the crystal structure has relatively little resistance to the iron atoms slipping past one another, and so pure iron is quite ductile, or soft and easily formed. In steel, small amounts of carbon, other ele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
