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Healdsburg Memorial Bridge
The Healdsburg Memorial Bridge is a steel truss bridge across the Russian River in Healdsburg, California, listed in the National Register of Historic Places.National Register of Historic Places Registration Form for Healdsburg Memorial Bridge, California State Park System, accessed 2011-12-26..Healdsburg Avenue Bridge bridgehunter.com, accessed 2011-12-26. It can be seen from nearby U.S. Route 101 and is "Healdsburg's abiding structural symbol". Description |
Russian River (California)
The Russian River (Southern Pomo: ''Ashokawna'', es, Río Ruso) is a southward-flowing river that drains of Sonoma and Mendocino counties in Northern California. With an annual average discharge of approximately 1,600,000 acre feet (2.0 km3), it is the second-largest river (after the Sacramento River) flowing through the nine-county Greater San Francisco Bay Area, with a mainstem long. Names The Southern Pomo know the river as Ashokawna (ʼaš:oʼkʰawna), "east water place" or "water to the east", and as Bidapte, "big river". Juan Rodríguez Cabrillo and his expedition may have travelled as far north as the Russian River in November 1542 before storms forced them to turn back south towards Monterey. The earliest Slavic name for the river, Slavyanka, appears on a Russian-American Company chart dated 1817. In 1827 the Spanish called it the San Ygnacio, and in 1843 the Spanish land grant referred to it as Rio Grande. The river takes its current name from Russian Iv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northwestern Pacific Railroad
The Northwestern Pacific Railroad is a regional shortline railroad utilizing a stretch of the 271 mile mainline between Schellville and Windsor with freight and Sonoma–Marin Area Rail Transit (SMART) commuter trains. Formerly, it was a regional railroad primarily used for logging that served the entire North Coast of California, with a main line running from Schellville to Eureka, along with an additional portion of the line running from the Ignacio Wye to the edge of San Rafael. The "Southern End" of the line, including Schellville to Willits and from Ignacio to San Rafael is owned by SMART, while the "Northern End" was formally owned and managed by the now-dissolved North Coast Railroad Authority but is now saved for use in California's 2018 Great Redwood Trail Act, which repurposes the unused railroad right-of-way from Eureka to Willits for future use as the Great Redwood Trail. History In the late 1800s both the Southern Pacific Railroad (“SP”) and the Atchi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridges Completed In 1921
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 the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historic American Engineering Record In California
History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well as the memory, discovery, collection, organization, presentation, and interpretation of these events. Historians seek knowledge of the past using historical sources such as written documents, oral accounts, art and material artifacts, and ecological markers. History is not complete and still has debatable mysteries. History is also an academic discipline which uses narrative to describe, examine, question, and analyze past events, and investigate their patterns of cause and effect. Historians often debate which narrative best explains an event, as well as the significance of different causes and effects. Historians also debate the nature of history as an end in itself, as well as its usefulness to give perspective on the problems of the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places In Sonoma County, California
__NOTOC__ This is a list of the National Register of Historic Places listings in Sonoma County, California. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Sonoma County, California, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in an online map. There are 73 properties and districts listed on the National Register in the county, including 6 National Historic Landmarks. Current listings See also *List of National Historic Landmarks in California *National Register of Historic Places listings in California *California Historical Landmarks in Sonoma County, California This is a list of the properties and districts — listed as California Historical Landmarks — within Sonoma County, California. :*Note: ''Click the "Map of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Bridges On The National Register Of Historic Places In California
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", which i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steel Bridges In The United States
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] |
Transportation Buildings And Structures In Sonoma County, California
Transport (in British English), or transportation (in American English), is the intentional movement of humans, animals, and goods from one location to another. Modes of transport include air, land (rail and road), water, cable, pipeline, and space. The field can be divided into infrastructure, vehicles, and operations. Transport enables human trade, which is essential for the development of civilizations. Transport infrastructure consists of both fixed installations, including roads, railways, airways, waterways, canals, and pipelines, and terminals such as airports, railway stations, bus stations, warehouses, trucking terminals, refueling depots (including fueling docks and fuel stations), and seaports. Terminals may be used both for interchange of passengers and cargo and for maintenance. Means of transport are any of the different kinds of transport facilities used to carry people or cargo. They may include vehicles, riding animals, and pack animals. Vehicles may inclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Healdsburg Municipal Beach Postcard
Healdsburg is a city located in Sonoma County, in California's Wine Country. At the 2010 census, the city had a population of 11,254. Owing to its three most important wine-producing regions (the Russian River, Dry Creek, and Alexander Valley AVAs), Healdsburg has been continuously awarded one of the top 10 small towns in America and is home to three of the top wineries in the United States. Healdsburg is centered on a 19th-century plaza that provides an important focal point for tourists and locals. History Early inhabitants of the local area included the Pomo people, who constructed villages in open areas along the Russian River. Anglo-American and Russian settlement may have commenced in the mid-19th century, with a settlement nearby, established downstream along the Russian River near Graton, in 1836, and later the Rancho Sotoyome land grant, in 1844. In 1857, Harmon Heald, an Ohio businessman who had been squatting on Rancho Sotoyome since 1850, purchased part of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Railroad
The Pennsylvania Railroad (reporting mark PRR), legal name The Pennsylvania Railroad Company also known as the "Pennsy", was an American Class I railroad that was established in 1846 and headquartered in Philadelphia, Pennsylvania. It was named for the commonwealth in which it was established. By 1882, Pennsylvania Railroad had become the largest railroad (by traffic and revenue), the largest transportation enterprise, and the largest corporation in the world. Its budget was second only to the U.S. government. Over the years, it acquired, merged with, or owned part of at least 800 other rail lines and companies. At the end of 1926, it operated of rail line;This mileage includes companies independently operated. PRR miles of all tracks, which includes first (or main), second, third, fourth, and sidings, totalled 28,040.49 at the end of 1926. in the 1920s, it carried nearly three times the traffic as other railroads of comparable length, such as the Union Pacific and Atchison, T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Healdsburg, California
Healdsburg is a city located in Sonoma County, in California's Wine Country. At the 2010 census, the city had a population of 11,254. Owing to its three most important wine-producing regions (the Russian River, Dry Creek, and Alexander Valley AVAs), Healdsburg has been continuously awarded one of the top 10 small towns in America and is home to three of the top wineries in the United States. Healdsburg is centered on a 19th-century plaza that provides an important focal point for tourists and locals. History Early inhabitants of the local area included the Pomo people, who constructed villages in open areas along the Russian River. Anglo-American and Russian settlement may have commenced in the mid-19th century, with a settlement nearby, established downstream along the Russian River near Graton, in 1836, and later the Rancho Sotoyome land grant, in 1844. In 1857, Harmon Heald, an Ohio businessman who had been squatting on Rancho Sotoyome since 1850, purchased part of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truss Bridge
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, and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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