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List Of Bridges Documented By The Historic American Engineering Record In Minnesota
__NOTOC__ This is a list of bridges documented by the Historic American Engineering Record in the U.S. state of Minnesota. Bridges Notes References {{HAER list, structure=bridge *List *List Minnesota Minnesota () is a state in the upper midwestern region of the United States. It is the 12th largest U.S. state in area and the 22nd most populous, with over 5.75 million residents. Minnesota is home to western prairies, now given over to ... Bridges, HAER Bridges, HAER ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historic American Engineering Record
Heritage Documentation Programs (HDP) is a division of the U.S. National Park Service (NPS) responsible for administering the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER), and Historic American Landscapes Survey (HALS). These programs were established to document historic places in the United States. Records consist of measured drawings, archival photographs, and written reports, and are archived in the Prints and Photographs Division of the Library of Congress. Historic American Buildings Survey In 1933, NPS established the Historic American Buildings Survey following a proposal by Charles E. Peterson, a young landscape architect in the agency. It was founded as a constructive make-work program for architects, draftsmen and photographers left jobless by the Great Depression. It was supported through the Historic Sites Act of 1935. Guided by field instructions from Washington, D.C., the first HABS recorders were tasked with docume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swing Bridge
A swing bridge (or swing span bridge) is a movable bridge that has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravity, about which the swing span (turning span) can then pivot horizontally as shown in the animated illustration to the right. Small swing bridges as found over canals may be pivoted only at one end, opening as would a gate, but require substantial underground structure to support the pivot. In its closed position, a swing bridge carrying a road or railway over a river or canal, for example, allows traffic to cross. When a water vessel needs to pass the bridge, road traffic is stopped (usually by traffic signals and barriers), and then motors rotate the bridge horizontally about its pivot point. The typical swing bridge will rotate approximately 90 degrees, or one-quarter turn; however, a bridge which intersects the navigation channel at an oblique angle may be built to rotate only 45 degrees, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bowstring Truss
A bowstring joins the two ends of the bow stave and launches the arrow. Desirable properties include light weight, strength, resistance to abrasion, and resistance to water. Mass has most effect at the center of the string; of extra mass in the middle of the string slows the arrow about as much as at the ends. String forms Most bowstrings may be described as either simple, reverse-twisted, or looped. Simple strings may be made of any fiber, twisted into a single cord. Such strings have been used in many parts of the world and are still effective and fairly quick to make. However, they tend to be weaker for their weight, and they may also come apart if not kept constantly under tension. They are normally secured to the bow by a knot/round turn and two half-hitches at each end. Reverse-twisted strings are traditional in Europe and North America for most natural materials. Linen and hemp fiber have been widely used. The form is also used for modern materials. A reverse-twisted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kern Bridge
Kern Bridge or Yaeger Bridge crossed the Le Sueur River in Blue Earth County in the U.S. state of Minnesota. It was built in 1873 using a bowstring through truss design by the Wrought Iron Bridge Company. It was long and carried a local road. It was listed on the National Register of Historic Places in 1980 as Minnesota's only bowstring arch truss bridge and oldest road bridge still in use. However, it was closed to vehicle traffic in 1991. In 2019, the Minnesota Department of Transportation (MnDOT) announced plans to dismantle the bridge and store it for eventual reuse elsewhere. According to the department's website, it has been removed and is available for suitable relocation. Less than downstream from its original site, the historic 1873 Kern Bridge has found a new home connecting the Land of Memories Park to Sibley Park in Mankato. Mankato will receive federal funding (80 percent of cost) to relocate and rehabilitate the bridge. According to MnDOT, "Although Mankato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duluth, Minnesota
, settlement_type = City , nicknames = Twin Ports (with Superior), Zenith City , motto = , image_skyline = , image_caption = Clockwise from top: urban Duluth skyline; Minnesota Point beach; Duluth Ship Canal and Aerial Lift Bridge with Canal Park in background; and North Pier Lighthouse with freighter arriving , image_flag = Flag_of_Duluth,_Minnesota.svg , flag_alt = Flag of Duluth (gold star on a light blue banner with white, green, and dark blue waves below) , image_map = St. Louis County Minnesota Incorporated and Unincorporated areas Duluth Highlighted.svg , mapsize = 250x200px , map_caption = Location of the city of Duluthwithin St. Louis County, Minnesota , image_map1 = , mapsize1 = , map_caption1 = , pushpin_map = Minnesota#USA , pushpin_label = Duluth , pushp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duluth Ship Canal
The Duluth Ship Canal is an artificial canal cut through Minnesota Point, providing direct access to Duluth harbor from Lake Superior. Begun privately in 1871, it was put under federal supervision and maintenance several years later. It is still an important component of the harbor facilities. In its current configuration, the canal is defined by a pair of breakwaters long and apart, constructed of concrete set on timber and stone cribbing. HAER No. MN-10 The canal is maintained at wide and LWD, allowing passage of ocean-going ships. Three lighthouses are placed on the sides of the canal: the Duluth North Pier Light and the Duluth South Breakwater Outer Light mark the lake ends of the canal, while the Duluth South Breakwater Inner Light functions with the south breakwater light as a range light. At the harbor end, the canal is straddled by the Aerial Lift Bridge which connects Minnesota Point to the rest of the city. On the north side, there is a building housing the local Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vertical-lift Bridge
A vertical-lift bridge or just lift bridge is a type of movable bridge in which a span rises vertically while remaining parallel with the deck. The vertical lift offers several benefits over other movable bridges such as the bascule and swing-span bridges. Generally speaking, they cost less to build for longer moveable spans. The counterweights in a vertical lift are only required to be equal to the weight of the deck, whereas bascule bridge counterweights must weigh several times as much as the span being lifted. As a result, heavier materials can be used in the deck, and so this type of bridge is especially suited for heavy railroad use. The biggest disadvantage to the vertical-lift bridge (in comparison with many other designs) is the height restriction for vessels passing under it, due to the deck remaining suspended above the passageway. Although most vertical-lift bridges use towers, each equipped with counterweights, some use hydraulic jacks located below the deck. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerial Lift Bridge
The Aerial Lift Bridge, earlier known as the Aerial Bridge or Aerial Ferry Bridge, is a landmark in the port city of Duluth, Minnesota. The span began life in 1905 as the United States' first transporter bridge: Only one other was ever constructed in the country, Sky Ride in Chicago. The span was converted in 1929–1930 to a vertical-lift bridge – also rather uncommon, although there are six such bridges along Ontario's Welland Canal – and continues to operate today. The bridge was added to the National Register of Historic Places on May 22, 1973. The bridge is owned and operated by the City of Duluth. The United States Army Corps of Engineers maintains a nearby maritime museum. Bridge history The bridge spans the Duluth Ship Canal, which was put through the miles-long sand spit named Minnesota Point – commonly called Park Point by locals – in 1870–1871. The natural mouth of the Saint Louis River is about farther southeast, and is split between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arch Bridge
An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side. A viaduct (a long bridge) may be made from a series of arches, although other more economical structures are typically used today. History Possibly the oldest existing arch bridge is the Mycenaean Arkadiko Bridge in Greece from about 1300 BC. The stone corbel arch bridge is still used by the local populace. The well-preserved Hellenistic Eleutherna Bridge has a triangular corbel arch. The 4th century BC Rhodes Footbridge rests on an early voussoir arch. Although true arches were already known by the Etruscans and ancient Greeks, the Romans were – as with the vault and the dome – the first to fully realize the potential of arches for bridge construction. A list of Roman bridges compiled by the engineer Colin O'Connor featur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hennepin Avenue Bridge
The Hennepin Avenue Bridge is the structure that carries Hennepin County State Aid Highway 52, Hennepin Avenue, across the Mississippi River in Minneapolis, Minnesota, at Nicollet Island. Officially, it is the Father Louis Hennepin Bridge, in honor of the 17th-century explorer Louis Hennepin, who was the first European to see the Saint Anthony Falls, a short distance downriver. Two of the three previous structures have been suspension bridges, while a third—which existed nearly a century—was composed of steel arch spans. The original crossing, which opened as a toll bridge on January 23, 1855, is believed to have been the first permanent span across the Mississippi at any point. Other bridges were completed in 1876, 1891, and most recently 1990. Today, the bridge's main span is in length. Image:Hennepin Avenue Bridge 1865.jpg, The original structure circa 1865 Image:Hennepin-Bridge-20080926.jpg, Facing Northeast Minneapolis Image:Hennepin Avenue Bridge-Grain Belt- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buffalo County, Wisconsin
Buffalo County is a county located in the U.S. state of Wisconsin. As of the 2020 census, the population was 13,317. Its county seat is Alma. The county was created in 1853 and organized the following year. History Buffalo County, founded in 1853, is named for the Buffalo River, which flows from Strum to Alma, where it empties into the Mississippi River. The Buffalo River obtained its name from the French voyager Father Louis Hennepin, who named it ''Riviere des Boeufs'' in 1680. The first permanent settlement was established in 1839, located in what is now Fountain City. This settlement was originally named Holmes' Landing after a family who traded with the Sioux and Chippewa. Buffalo County was settled primarily by Swiss, German, and Norwegian immigrants who were drawn to the area by the growing lumber industry, fertile soils, access to the Mississippi, and available land. By 1848, a second community was established called Twelve Mile Bluff, which is now known as Alm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winona County, Minnesota
Winona County is a county in the U.S. state of Minnesota. As of the 2020 census, its population was 49,671. Its county seat is Winona. Winona County comprises the Winona, MN Micropolitan Statistical Area. History The Wisconsin Territory was established by the federal government effective July 3, 1836, and existed until its eastern portion was granted statehood (as Wisconsin) in 1848. The federal government set up the Minnesota Territory effective March 3, 1849. The newly organized territorial legislature created nine counties across the territory in October of that year. One of those original counties, Wabasha, had its southern section partitioned off on March 5, 1853, into a new county, Fillmore. On February 23, 1854, the legislature partitioned the northern part of Fillmore County, plus a small section of Wabasha, to create Winona County, with the village of Winona as county seat. The county name was taken from the village name, which is said to derive from a Dakota lege ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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