| 词条 | Verde River Sheep Bridge |
| 释义 |
| name = Verde River Sheep Bridge | nrhp_type = | image = Verde River Sheep Bridge.jpg | caption = | nearest_city= Carefree, Arizona | coordinates = {{coord|34|4|39|N|111|42|26|W|display=inline,title}} | locmapin = Arizona#USA | built = {{Start date|1940}} | architecture = Suspension | added = November 21, 1978 | area = {{convert|5|acre}} | governing_body = Federal | refnum = 78000569[1] }} The Verde River Sheep Bridge, also known as the Red Point Sheep Bridge, is a suspension bridge which crosses the Verde River in Arizona. Constructed primarily to allow sheep to be driven between grazing ranges on either side of the river. Building started in 1943 and was completed in 1944. Sheep drives stopped in 1978. The bridge was closed in 1987 and largely demolished in 1988. A replica bridge was constructed in by the U.S. Forest Service in 1989 to allow hikers access to the Mazatzal Wilderness in Tonto National Forest. The original west suspension tower still remains alongside the replica bridge. HistoryDr. R.O. Raymond of the Flagstaff Sheep Company owned a winter sheep allotment on the east side of the Verde River and a summer allotment on the west side. Access between the sides was difficult, and high water conditions could make it hazardous to ford the river. Raymond decided to fund the construction of a narrow suspension bridge across the Verde to make the crossing easier. A road was built to the bridge site in 1943 and construction was started on a bridge to a design by C.O. Gilliam. It was built using surplus materials from the Bluebell Mine, as well as some cables from the Golden Turkey Mine. The builders were Frank Auza, the Flagstaff Sheep Company's foreman, and George W. Smith, a local builder, with a crew of more than thirty Basque, French Basque, Mexican and Hispanic sheepherders. Auza and Smith visited the Blue Point Sheep Bridge on the Salt River to learn about its construction, deciding to call the Verde River bridge the Red Point Bridge. The total cost of the bridge as originally built was $7277. Auza maintained the bridge until 1978, when sheep herding was discontinued in the area.[2][3] DescriptionThe original bridge measured {{convert|691|ft|m}} overall from anchorage to anchorage and was {{convert|45|in|cm}} wide, with a clear cable span of {{convert|568|ft|m}}. The walkway, whose abutments were located between the towers, had a span of {{convert|476|ft|m}} with a clearance of about {{convert|45|ft|m}} over the river. The suspension span was supported by {{convert|1.5|in|cm|adj=on}} wire rope with {{convert|0.375|in|mm|adj=on}} wire rope suspenders {{convert|8|ft|m}} apart. The deck and railings are wood. The {{convert|50|ft|m|adj=on}} tall west tower is concrete.[3] Although Gilliam designed the tower legs as large timbers, they were made of built-up 2x10s which were more readily available. However, this assembly soon deteriorated, so Auza erected formwork around them and poured concrete towers. Sway bracing was provided by wire cable stays.[2] Designation and replacementThe bridge was placed on the National Register of Historic Places on November 21, 1978.[1] The original bridge was closed in 1987[2] and was replaced by a replica in 1989. It provides access to the Mazatzal Wilderness in Tonto National Forest. The bridge is maintained as part of the forest's trail system.[4] The original bridge's concrete abutment remains. References1. ^1 {{NRISref|version=2010a}} 2. ^1 2 {{cite web|last1=Gerald A. Doyle & Associates|title=Verde River Sheep Bridge (Red Point Sheep Bridge)|url=http://lcweb2.loc.gov/master/pnp/habshaer/az/az0200/az0229/data/az0229data.pdf|publisher=Historic American Engineering Record|accessdate=15 June 2015|date=July 1987}} 3. ^1 {{cite web|last1=Weinel|first1=W.G.|title=Verde River Sheep Bridge|url={{NRHP url|id=78000569}}|publisher=National Park Service|accessdate=15 June 2015|date=July 22, 1975}} 4. ^{{cite web|title=Sheeps Bridge|url=http://www.fs.usda.gov/recarea/tonto/null/recarea/?recid=35219&actid=34|website=Tonto National Forest|publisher=U.S. Forest Service|accessdate=15 June 2015}} External links
13 : National Register of Historic Places in Arizona|Buildings and structures in Yavapai County, Arizona|Historic American Engineering Record in Arizona|Suspension bridges in Arizona|Tonto National Forest|Agricultural buildings and structures on the National Register of Historic Places|Bridges on the National Register of Historic Places in Arizona|National Register of Historic Places in Yavapai County, Arizona|Agricultural buildings and structures on the National Register of Historic Places in Arizona|Towers in Arizona|Bridges completed in 1940|Concrete bridges in the United States|Wooden bridges in the United States |
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