Dearborn River High Bridge
Coordinates: 47 ° 16'52 " N , 112 ° 23'25" W.
| Dearborn River High Bridge | ||
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| Convicted | Dearborn River | |
| place | Lewis and Clark County in Montana (USA) | |
| Entertained by | County Highway Agency | |
| Building number | L25300009 + 00001 | |
| construction | Truss bridge made of steel, concrete and stone | |
| overall length | 77 m | |
| width | 4.9 m | |
| Longest span | 48.8 m | |
| height | 30.5 m | |
| vehicles per day | 100 | |
| start of building | 1896 | |
| completion | 1897, renewed in 2003 | |
| planner | Zenas King, King Bridge Co., Cleveland , OH | |
| location | ||
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| Dearborn River High Bridge | |
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| National Register of Historic Places | |
| location | Lewis and Clark County in Montana (USA) |
| Coordinates | 47 ° 16 ′ 52 " N , 112 ° 23 ′ 25" W. |
| surface | 3.6 ha |
| NRHP number | 03001298 |
| The NRHP added | December 18, 2003 |
The Dearborn River High Bridge is a Pratt truss bridge built in 1897 . The structure, which is listed on the National Register of Historic Places , was one of the few remaining bridges of this type in the United States in early 2012. It leads Lake Bean Road (Montana Secondary Road 435) about 25 km southwest of Augusta , Montana , over the Dearborn River . The structure is unusual because the carriageway is built in the middle of the framework and not, as is usually the case, above or below. This unusual design of the Dearborn River High Bridge is well suited for carrying light loads over deep cuts. The structure has four spans and originally had a deck made of wooden planks. It is the last surviving with rivets connected parallelgurtige truss bridge , a road in the central position in the entire United States. Construction costs were $ 9997 (today's prices: $ 317,000). Construction began in 1896 and was completed in 1897.
At this point there has been a ford for a long time , at which the Indian tribes of the region, especially the Piegan , crossed the river. Before the bridge was built, the site was known as the Ponderay Crossing . The river was named after the Secretary of War Henry Dearborn by Lewis and Clark in 1805 . For the next five decades, the area was relatively unexplored by whites.
In 2003 the bridge was renewed by the Montana Department of Transportation . On December 18 of the same year, the bridge was added to the National Register of Historic Places.
See also
Individual evidence
- ↑ Dearborn River High Bridge ( English ) Bridge Hunter. Retrieved February 9, 2012.
- ^ The Dearborn Bridge . Montana Education Telecommunications Network (METNET). Archived from the original on March 4, 2016. Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved January 15, 2012.
- ^ A b Jon Axline (Ed.): Montana's Historical Highway Markers ( English ), 4th Edition, Montana Historical Society Press, Helena , MT 2008, ISBN 0975919644 , p. 97 ( Accessed January 7, 2012).
- ↑ a b c MDT Restores Dearborn River High Bridge ( English , PDF; 5.9 MB) Montana Department of Transportation. Retrieved February 8, 2012.
- ^ A b Martin J. Kidston: Bridge Over Dearborn River One Of A Kind (English) . In: Helena Independent Record , May 11, 2004. Retrieved February 9, 2012.
