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((Infobox Bridge
|bridge_name=Lewis and Clark Viaduct/Intercity Viaduct
|image=Quality-i70.jpg
|caption=Intercity Viaduct on the right, the original Lewis and Clark Viaduct on the left.
Intercity Viaduct is left, the since rebulit Lewis and Clark Viaduct is right.
|official_name=Lewis and Clark Viaduct
|carries=7 lanes of ((jct|country=USA|I|70|US|24|US|40|US|169)) (3 westbound, 4 eastbound)<br>bike/pedestrian path (eastbound)
|crosses=[[Kansas River]]
|locale=[[Kansas City, Kansas]]–[[Kansas City, Missouri]]
|maint=[[Kansas Department of Transportation|KDOT]] and [[Missouri Department of Transportation|MoDOT]]
|id=
|design=[[Truss bridge|Deck truss bridge]](eastbound and original westbound)<br/>[[Girder bridge]] (current westbound)
|mainspan=((convert|1151.1|m|ft|disp=flip|abbr=on))
|length=
|width=((convert|15.8|m|ft|disp=flip|abbr=on))
|clearance=((convert|8.8|m|ft|disp=flip|abbr=on))
|below=
|traffic=23,500 (2008)
|open=((start date and age|1907|1|29)) (eastbound)<br/>1930 (second deck)<br/>((start date and age|1962|11|12)) (westbound)
|rebuilt=1962-1963 (eastbound)<br/> 2018-2021 (westbound)
|closed=
|toll=former
|map_cue=
|map_image=
|map_text=
|map_width=
|coordinates=((coord|39.1133|-94.6149|type:landmark_region:US|display=inline,title))
))

The '''Intercity Viaduct''' and '''Lewis and Clark Viaduct''' are a pair of automobile [[bridge]]s that cross the [[Kansas River]] in the United States. Designed by Waddell and Hedrick, the first bridge, a four lane, [[deck truss bridge]] opened to the public on January 29, 1907,<ref>((Cite news|date=1907-12-20|title=Answers|page=6B|work=The Kansas City Star|url=https://infoweb.newsbank.com/apps/news/openurl?ctx_ver=z39.88-2004&rft_id=info%3Asid/infoweb.newsbank.com&svc_dat=WORLDNEWS&req_dat=0E5495A923143B2A&rft_val_format=info%3Aofi/fmt%3Akev%3Amtx%3Actx&rft_dat=document_id%3Aimage%252Fv2%253A1126152C152E4978%2540EANX-NB-16BAEE98F713C6B6%25402417930-16BACEEF8E51B73F%254019-16BACEEF8E51B73F%2540/hlterms%3A%2522leavenworth%2522%2520AND%2520%2522troops%2522%2520AND%2520%2522intercity%2520viaduct%2522|access-date=2021-12-28))</ref> with a second bridge being constructed in 1962. It rises above the [[West Bottoms]], and several sets of [[railroad tracks]]. The eastbound bridge is notable for being the first roadway bridge to connect [[Kansas City, Missouri]], with [[Kansas City, Kansas]], non-stop all the way across. It is about ((convert|1.5|mi|km)) long and carries traffic flowing the concurrency of [[Interstate&nbsp;70]] (I-70)/[[U.S. Route&nbsp;24]] (US&nbsp;24)/[[U.S. Route 40|US&nbsp;40]]/[[U.S. Route 169|US&nbsp;169]].


==History==

===1900s-1960s: early history===
[[Image:IntercityViaduct1908.jpg|thumb|The Intercity Viaduct as seen in this 1908 photograph, streetcar tracks in view at right. Lewis and Clark Viaduct not yet built]]
Designed by the engineering firm Waddell and Hedrick in 1903, the viaduct followed a flood that same year that wiped out all but one of the 17 bridges that spanned the Kaw River.<ref name="library">((cite news |url= http://www.kckpl.lib.ks.us/kscoll/lochist/thennow/TN47.htm |title= Intercity bridge spans two states |work= Kansas City Kansan |date= March 2, 1986 |via= Kansas City Public Library |accessdate= June 23, 2010 |archive-url= https://web.archive.org/web/20070813211845/http://www.kckpl.lib.ks.us/kscoll/lochist/thennow/TN47.htm |archive-date= August 13, 2007 |url-status= dead ))</ref> Ground was broken to mark the building of the bridge on August 9, 1905.<ref name="library"/> 

On January 29, 1907, the Bridge opened to two lanes of tolled wagon traffic, with a pair of divided [[streetcar]] tracks separated from the roadway.<ref name="library"/> Only one year after opening, the Bridge survived a flood. 

In 1911, the Bank closed the bridge indefinitely as the tolls did not cover the bridge's cost.<ref name= "KSDOT"> ((cite web | title=Lewis & Clark Viaduct Study History Page | website=KDOT | date=10 February 2014 | url=https://www.ksdot.gov/subsites/lewis-and-clark/LCViaductI70/History.html | access-date=5 May 2024))</ref>

In January 1917, the Kansas Legislature passed a bill giving the Kansas side authority to contract with K.C., Mo. By this enabling act, KCK could issue bonds for the purpose of purchasing the Intercity Viaduct for free traffic and so street car service would be available.<ref name="library"/> After 6 year of disuse, Kansas City, Kansas, and Kansas City, Missouri co purchased the viaduct in 1917 for 1,775,000.<ref name="library"/>  On October 30, 1918,<ref name="library"/> a ribbon cutting ceremony held to open the bridge to free traffic under city control and ownership, the toll booths were then removed form the bridge.<ref name= KSDOT/>

In 1930, a new lower roadway was completed, it was created in order to avoid slower traffic paralleling with faster vehicles, which had previously created severe congestion.<ref name="library" /> It also doubled the previous capacity, allowing for four lanes, two in each direction on both levels.<ref name= KSDOT /> Additionally, a stricter speed limit was enacted on the upper level, and the old lighting system on that deck was also replaced by new contemporary vapor lighting.<ref name="library" />

On November 30, 1936, a project which rebuilt the upper roadway was completed. It involved paving over the streetcar track's with roadway to add two extra roadway lanes, and replacing the existing road deck after over 20 years of service.<ref name= KSDOT />

The bridge survived the [[Great Flood of 1951|1951 Great Kansas City flood]], the only bridge to remain open to traffic during the flood.<ref name= KSDOT />

===1960s-present: twinning and later history===
On November 12, 1962, <ref name="library"/> The Lewis and Clark Viaduct was completed. It sits to the north of the first viaduct.<ref name= KSDOT /> It is of a taller height and can accommodate contemporary vehicle width. At this point, eastbound traffic was closed temporarily, and the original span was rebuilt, with all of its old steel piers being tubed off and replaced with modern concrete piers, and the lighting was removed and steel deck replaced with concrete coating, along with construction of on-ramps to serve as exits of I-70. <ref name="library"/> It was reopened in 1963, at which point it was restriped to carry four lanes of eastbound traffic only, and the bottom deck would be closed.<ref name= KSDOT />

On January 25, 1969, the spans were officially named as the Lewis and Clark Viaduct after the westbound bridge.<ref name= KSDOT /> in honor of [[Lewis and Clark Expedition]].

In 1972, the eastbound bridge was repaired.

In 1984, the westbound bridge was extensively repaired for the last time.<ref name= KSDOT />

In 1993, both spans survived the [[Great Flood of 1993|Great Kansas City flood of 1993]].<ref name= KSDOT />

In 1999, construction work on restoring the lower level of the eastbound span was stated. It involved repairing and rebuilding the deck and converting the on-ramps for pedestrian use. The project was completed in 2000.<ref name= KSDOT />

On January 29, 2007, the eastbound bridge celebrated its 100th year of service, and several people gathered from [[West Bottoms]] on the same day it opened, holding lights to the bridge in honor of its 100 years of service.((citation needed|date=April 2024)) 

In 2018, the westbound span over the Kansas River and the part of the viaduct on the Missouri side was closed for reconstruction. The bridge was demolished with explosives in 2018. Work was delayed due to the [[2019 Midwestern U.S. floods|floods of 2019]].<ref>((Cite web |title=Westbound Lewis & Clark Viaduct Opens to Traffic in Kansas City ((!)) ACP |url=https://www.acppubs.com/articles/westbound-lewis-clark-viaduct-opens-to-traffic-in-kansas-city |access-date=2022-07-29 |website=www.acppubs.com))</ref>  The bridge reopened in 2021. Unlike the original westbound bridge, it has lighting, as well as an adequate shoulder missing from the 1962 structure.

Only 1 week after reopening, one of the westbound spans unaltered approaches were damaged by a truck that crashed into a guardrail at a sharp angle, along with other cars that fell off.<ref> ((cite web | title=TKC Must See Aftermath: Kansas City WB I-70 at Lewis &amp; Clark Viaduct Closed Again After Horrifying Truck Crash | website=Tony's Kansas City | date=30 January 2021 | url=https://www.tonyskansascity.com/2021/01/tkc-must-see-aftermath-kansas-city-wb-i.html?m=1 | access-date=5 May 2024))</ref>

The Eastbound span was closed for emergency deck repairs in October 2021.<ref>((Cite web |title=EB Lewis and Clark Viaduct Closure Begins October 23 |url=https://www.downtownkck.org/news/2021/10/14/eb-lewis-and-clark-viaduct-closure-begins-october-23 |access-date=2022-07-29 |website=The Downtown Shareholders |language=en-US))</ref>

==See also==
* ((Portal-inline|Transport))
* ((Portal-inline|Engineering))
* ((Portal-inline|Kansas))
* ((Portal-inline|United States))

==References==
<references/>

((Crossings navbox
|structure       = Crossings
|place           = [[Kansas River]]
|bridge          = Intercity Viaduct
|bridge signs    = [[Image:I-70.svg|20px|alt=Interstate 70]] [[Image:US 24.svg|20px|alt=US Highway 24]] [[Image:US 40.svg|20px|alt=US Highway 40]] [[Image:US 169.svg|25px|alt=US Highway 169]]
|upstream        = [[James Street Bridge (Kansas City)|James Street Bridge]]
|downstream      = [[Union Pacific Bridge (Two Rivers Bridge)]]
|downstream signs = ''Union Pacific Railroad''
))

[[Category:Bridges over the Kansas River]]
[[Category:Bridges in Kansas City, Kansas]]
[[Category:Bridges in Kansas City, Missouri]]
[[Category:Girder bridges in the United States]]
[[Category:Interstate 70]]
[[Category:U.S. Route 24]]
[[Category:U.S. Route 40]]
[[Category:U.S. Route 169]]
[[Category:Bridges completed in 1907]]
[[Category:1907 establishments in Kentucky]]
[[Category:Bridges completed in 1962]]
[[Category:1962 establishments in Kentucky]]
[[Category:2018 disestablishments in Kentucky]]
[[Category:Bridges completed in 2021]]
[[Category:2021 establishments in Kentucky]]
[[Category:Truss bridges in the United States]]
[[Category:Truss bridges]]
[[Category:Viaducts in the United States]]
[[Category:Road bridges in Missouri]]
[[Category:Road bridges in Kansas]]
[[Category:Bridges on the Interstate Highway System]]
[[Category:Bridges of the United States Numbered Highway System]]
[[Category:Former toll bridges in Kansas]]
[[Category:Former toll bridges in Missouri]]

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