Tuesday, February 16, 2021

George Rogers Clark Memorial Bridge over Ohio River at Louisville, IL

(Bridge Hunter; Historic Bridges; Satellite)

"This landmark work of a famous engineering firm [Modjeski and Masters] consists of two identical cantilever truss bridge units. As such, the bridge contains a special double anchor pier, and at this point for visual continuity, the end posts are vertical rather then inclined, giving the truss a continuous appearance at this point." [Historic Bridges]

Postcard via Bridge Hunter

Photo taken by C Hanchey in August 2011 via Bridge Hunter, License: Creative Commons Attribution-NonCommercial (CC BY-NC)
[Note the two trusses of the Pennsy RR bridge in the background.]

Until I saw this photo, I never appreciated that this bridge is two cantilever bridges that are joined in the middle of the river. First of all, there are four towers. But what caught my eye is that there was a pier between two of the towers. Looking at the other photos, it becomes obvious that that pier anchors the south anchor span of the north cantilever bridge and the north anchor span of the south cantilever bridge.
Pete Zimmerman posted
Sidewheeler river steamer of Louisville & Cincinnati Pcket Co. Photographed: at Louisville, Kentucky, 1929
Otto Perry photographer, Denver Public Library Special Collections

I include a closeup because we can better see the Pennsy bridge and the control structure of the McAlpine Dam.
Photo taken by C Hanchey in August 2011 via Bridge Hunter, License: Creative Commons Attribution-NonCommercial (CC BY-NC)

"Federal Standard Cream" is an interesting bridge color. At least Kentucky is not letting all of its truss bridges rot away.
Andrzej Mucka, Jan 2021, cropped

J.P. comment in Bridge Hunter

This post was the motivation to document this bridge. It is a little difficult to see with the black on black, but an upbound tow got spun around and is now heading downstream sideways! Several of the barges then allided with the McAlpine Dam. A Facebook comment said "engine 2 failed."
Screenshot

Look at the piers in the screenshot above to see how high the river was. We also see how high the river was in this photo. 
USACE photo by Katie Newton via ProgressiveFarmer via DeBruler
"Note the Ohio River is as high downstream as it was upstream at the 27' fall of the Falls on the Ohio last December."


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