| 词条 | Liberty Bridge (Pittsburgh) |
| 释义 |
| name = Liberty Bridge | image = Liberty_Bridge.jpg |image_size=300px | caption = The arching Liberty bridge (second from foreground) crosses the Monongahela. | official_name = Liberty Bridge | also_known_as = South Hills Bridge | carries = 4 lanes of roadway | crosses = Monongahela River | locale = Pittsburgh, Pennsylvania | maint = Allegheny County | id = | design = Cantilever bridge | material = steel | mainspan = 2 spans, each {{convert|448|ft|m}} | length = {{convert|2663|ft|m}} | width = | clearance = | below = {{convert|44.4|ft|m}} | traffic = 63,000[1] | open = {{start date and age|1928|March|27|mf=yes}} | closed = | toll = | map_cue = | map_image = | map_text = | map_width = | coordinates = {{coord|40.4328|-79.9967|type:landmark_region:US-PA|display=inline,title}} | lat = | long = }} The Liberty Bridge, completed in 1928, connects downtown Pittsburgh, Pennsylvania, to the Liberty Tunnels and the South Hills neighborhoods beyond. It crosses the Monongahela River and intersects Interstate 579 (the Crosstown Boulevard) at its northern terminus. HistoryThe Liberty Bridge is a steel cantilever bridge and was constructed as the missing link between downtown Pittsburgh and the Liberty Tunnel, which had been constructed four years earlier in 1924 as a link to the South Hills. The bridge opened on March 27, 1928, following a {{convert|5|mi|km|adj=mid}} vehicle parade[2] from the southern suburbs of the city, which crossed the Smithfield Street Bridge and proceeded through downtown before ending at the southern end of the new bridge.[3] It was designed by George S. Richardson and cost $3,456,000 to build. It is 2663' 3/16" long, though the main span is 448' and the water clearance is 44.4'.[4] It was renovated in 1982 by the Dick Corporation, at a cost of $32 million.{{fact|date=October 2018}} FireOn September 2, 2016 the Liberty Bridge was closed for 24 days, following a fire during construction work on the bridge.[5][6] Intense heat from burning plastic piping had caused a {{convert|30|foot|m|0}} steel beam (compression chord) to buckle.[7] The bridge reopened to weight-limited traffic on September 26th, and full traffic on September 30th. The Pennsylvania Department of Transportation assessed the value of the damages at over $3 million.[8] See also
References{{commons category|Liberty Bridge, Pittsburgh}}1. ^{{cite web |url=https://www.roadsbridges.com/holding-down-fort |title=Holding down the fort |date=December 6, 2007 |accessdate=May 14, 2018}} 2. ^{{cite web |url=http://brooklineconnection.com/history/Gallery/Bridge28.html |title=The Liberty Bridge Dedication - 1928 |date= |accessdate=October 25, 2010}} 3. ^{{cite web |url=http://lcweb2.loc.gov/pnp/habshaer/pa/pa3500/pa3566/data/pa3566data.pdf |title=Liberty Bridge |last=Gruen |first=J. Philip |date=August 1997 |website=Historic American Engineering Record |publisher=Library of Congress |location=Washington, D.C. |page=7 |accessdate=January 28, 2014 |deadurl=yes |archiveurl=https://web.archive.org/web/20121023212808/http://lcweb2.loc.gov/pnp/habshaer/pa/pa3500/pa3566/data/pa3566data.pdf |archivedate=October 23, 2012 |df= }} 4. ^{{cite web|url=http://pghbridges.com/pittsburghE/0585-4476/libertybr.htm|title=Liberty Bridge - Bridges and Tunnels of Allegheny County and Pittsburgh, PA|author=|date=|website=pghbridges.com}} 5. ^{{cite web |url=http://triblive.com/news/adminpage/11208556-74/bridge-river-penndot|title=Liberty Bridge open again, but with a 9-ton limit on vehicles |date=September 26, 2016 |accessdate=October 17, 2016}} 6. ^{{cite web |url=http://www.wtae.com/news/fire-shuts-down-liberty-bridge/41487492 |title=Fire closes Liberty Bridge and Tunnel indefinitely, causing traffic nightmare |date=September 2, 2016 |accessdate=September 2, 2016}} 7. ^"PennDOT works on Liberty Bridge timeline". September 4, 2016. Pittsburgh Post-Gazette. 8. ^{{cite web |url=http://www.post-gazette.com/news/transportation/2016/11/02/PennDOT-sets-damages-from-Liberty-Bridge-closure-at-3-million/stories/201611020143 |title=PennDOT sets damages from Liberty Bridge closure at $3 million |date=November 2, 2016 |accessdate=November 2, 2016}} External links
|structure = Bridges |place = Monongahela River |bridge = Liberty Bridge |bridge signs = SR 3069 |upstream = South Tenth Street Bridge |upstream signs = |downstream = Panhandle Bridge |downstream signs = }}{{Pittsburgh Bridges}}{{National Register of Historic Places in Pennsylvania}}{{NRHP bridges}}{{Pennsylvania-bridge-struct-stub}}{{Pittsburgh-struct-stub}} 11 : Bridges in Pittsburgh|Bridges over the Monongahela River|Road bridges on the National Register of Historic Places in Pennsylvania|Bridges completed in 1928|Historic American Engineering Record in Pennsylvania|Road bridges in Pennsylvania|Roads with a reversible lane|1928 establishments in Pennsylvania|National Register of Historic Places in Pittsburgh|Steel bridges in the United States|Cantilever bridges in the United States |
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