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〕 | width_type = | number = | number_type = | height_imperial = 8.0 | height_round = 1 | height_type = Clearance | height_note = | depth_imperial = | volume_imperial = | area_imperial = | style_type = Design | style = Burr arch truss bridge | material = Wood | author_type = Builder | author = Sadler Rogers (or Rodgers) | established_type = Built | established = 1850 | established_note = | established1_type = Restored | established1 = 1970, 2004 | management_type = Owned and maintained by | management = Pennsylvania, PennDOT | code_type = NBI Number | code_label = National Bridge Inventory identification number | code = 564012001000500 | code_note =〔 ''Note'': this is a formatted scrape of the 2010 official website, which can be found here for Pennsylvania: 〕 | code1_type = WGCB Number | code1_label = World Guide to Covered Bridges Number | code1 = 38-57-01 | code1_note = | public = | visitation = | visitation_date = | access = | access_type = | whs_name = | whs_year = | whs_number = | whs_region = | whs_criteria = | iucn_category = | free_type = Load | free = 3 tons (2.7 t) | free1_type = Added to NRHP | free1 = July 24, 1980 | free2_type = NRHP Ref# | free2 = 80003639 | free3_type = MPS | free3 = Covered Bridges of Bradford, Sullivan and Lycoming Counties TR | map = Pennsylvania Locator Map.PNG | map_size = 300 | map_caption = Location of the Forksville Covered Bridge in Pennsylvania | map_locator = Pennsylvania | commons = Forksville Covered Bridge | statistics = | website = | footnotes = }} The Forksville Covered Bridge is a Burr arch truss covered bridge over Loyalsock Creek in the borough of Forksville, Sullivan County, in the U.S. state of Pennsylvania. It was built in 1850 and is in length. The bridge was placed on the National Register of Historic Places in 1980. The Forksville bridge is named for the borough it is in, which in turn is named for its location at the confluence or "forks" of the Little Loyalsock and Loyalsock Creeks. Pennsylvania had the first covered bridge in the United States and the most such bridges in both the 19th and 21st centuries. They were a transition between stone and metal bridges, with the roof and sides protecting the wooden structure from weather. The Forksville bridge is a Burr arch truss type, with a load-bearing arch sandwiching multiple vertical king posts, for strength and rigidity. The building of the Forksville bridge was supervised by the 18-year-old Sadler Rogers, who used his hand-carved model of the structure. It served as the site of a stream gauge from 1908 to 1913 and is still an official Pennsylvania state highway bridge. The United States Department of Transportation Federal Highway Administration uses it as the model of a covered bridge "classic gable roof",〔 and it serves as the logo of a Pennsylvania insurance company. The bridge was restored in 1970 and 2004 and is still in use, with average daily traffic of 224 vehicles in 2009. Despite the restorations, as of 2009 the bridge structure's sufficiency rating on the National Bridge Inventory was only 17.7 percent and its condition was deemed "basically intolerable requiring high priority of corrective action".〔 It is one of three remaining covered bridges in Sullivan County, and according to Susan M. Zacher's ''The Covered Bridges of Pennsylvania: A Guide'', its location "over the rocky Loyalsock Creek" is "one of the most attractive settings in the state."〔 ==Overview== The covered bridge is in the borough of Forksville on Bridge Street, a spur of State Route 4012, just west of Pennsylvania Route 154. It is about south of Pennsylvania Route 87 and north of Worlds End State Park on PA 154.〔 Forksville Covered Bridge is its official name on the National Register of Historic Places (NRHP).〔 Sullivan County is located in north central Pennsylvania, about 123 miles (198 km) northwest of Philadelphia and 195 miles (314 km) east-northeast of Pittsburgh. The bridge is just upstream of the confluence of the Little Loyalsock and Loyalsock Creeks. This was known as the "forks of the Loyalsock" and gave Forks Township its name when the township was incorporated in 1833, while still part of Lycoming County. Sullivan County was formed from part of Lycoming County on March 14, 1847, and the bridge was built in 1850. The name of the bridge comes from the community of Forksville, which is on land first settled in 1794, was laid out as a village in 1854, and was incorporated as a borough from part of Forks Township on December 22, 1880.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Forksville Covered Bridge」の詳細全文を読む スポンサード リンク
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