Sunday, June 25, 2017

2011 LA-10 over Mississippi River near St. Francisville, LA

(Bridge Hunter, John Weeks IIISatellite (36 photos), formal name: John James Audubon Bridge)

John Weeks III
The 1583-foot main span claimed the title of the longest in the United States from the Cooper River Bridge by 37 feet. The 520 foot tall towers are supported by 42 drilled shafts that extend 180 feet into the riverbed. The 2.5 mile bridge is four lanes with big sholders. The state road using this bridge is currently just a two lane road.  The planned cost per daily vehicle cost was $350m/6000 = $58k. The actual cost is (2012) $410m/2887 = $142k. It replaced a ferry service.

US-17 between Charleston and Mt. Pleasant SC

(Bridge Hunter, 3D Satellite (198 Photos), formal name: Arthur Ravenel Bridge)

"Longest Cable-Stayed bridge in America" [Bridge Hunter] That is no longer true. The John James Audubon Bridge has a main span that is 37 feet longer than the 1546 foot main span of this bridge.

The construction company for this bridge bought the crane that was created to build the Luling Bridge.

It replaced two cantilever truss bridges.

Photo by Andrew Penik from Bridge Hunter
All three 1929, 1966, 2005

1983 I-310 Bridge over Mississippi River at Luling, LA

(Bridge Hunter, John Weeks III3D Satellite (32 photos), formal name: Hale Boggs Memorial Bridge)

More info on the barge-mounted 60-foot ringer crane that was created to build the bridge is here. The big crane was then bought by the Cooper River Construction company to build the Arthur J. Ravenel Jr. Bridge.

Ben Stalvey posted
Under Construction, from Bridge Hunter
John Weeks III
"The Hale Boggs Memorial Bridge, also known as the Luling Bridge, was the first major cable stayed bridge to be built in the United States. The bridge is somewhat unusual for a cable stayed structure in that is has very few stay cables. In addition, the deck is built like a box girder, which is a much more robust structure than typically seen on suspended bridges....The bridge towers soar 400 feet into the air, with the deck having 155 feet of clearance between the sea-level water and the low bridge steel over the navigation channel." It was designed to survive hurricane force winds and Katrina demonstrated that the design worked. [John Weeks III] As I used to say at work, "being on the cutting edge of technology means you bleed a lot." Between 2009 and 2012 all of the cables were replaced because the original ones were beginning to corrode. The new cables are seven-wire strands coated in grease then encased in plastic. The original 72 cables were sealed with grout before being encased in plastic. The problem was that the grout began to crack and allowed water to make contact with the cables causing the steel to corrode. The new cables did not meet specification and had to be replaced. [NOLA: 1, 2] There were additional problems with rust and water leakage in the anchorages. [Wikipedia, (the ENR reference link does not work)]

60-foot ringer crane in the 1980s.

I got the impression that this was the first ringer crane ever designed. Or at least the largest at its time.

After it built the Luling Bridge, it was bought by the contractor for the Copper River Bridge in South Carolina. After that bride was done, the US Army Core of Engineers bought it.
Ben Stalvey posted
Can't wait to see more pictures of this platform Ringer. The US Army Corp Of Engineers owns it now. Called Hercules
Josh Karras commented on the posting
[This  is another barge mounted ringer crane with a jib and a big pile of counterweights.]
In 2013, Hercules helped clean up the Marseilles Dam barge allision.
US Coast Guard Photo from gCaptain

Saturday, June 24, 2017

CSX/L&N Banklick Trestle near Independence, KY

(Bridge Hunter, no Historic Bridges, 3D Satellite, Street View)

Mark Hinsdale posted
The "Family Lines" System...
In August, 1980, some good friends and I managed to pick what had to have been the hottest, stickiest weekend in the history of the Ohio River Valley to spend railfanning in Cincinnati. While scouting out the north end of Decoursey Yard, we spotted a five unit Family Lines merchandise train that appeared to be about to depart. It was a good catch for us, and destined for the L&N "Short Line," so we headed out to the famous trestle at Independence KY to wait. And wait. And wait. After climbing all the way up there in heat and humidity one could cut with a kinife, we were not about to throw in the towel. We were finally rewarded, well over two hours later, with this view, in the hazy late afternoon sun. Photo by Mark Hinsdale

KO Tower: (Acutally Tower KO) C&NW vs. C&NW

(Satellite, Flickr)
Zachary C. Gillihan posted
All, I am looking for more information on this board, thinking Chicago area and possibly Lake Forest? Anyone have any photos of it in service?
Jon Roma As best as I can tell, the tower was built by the Chicago North Shore & Milwaukee interurban when they built their Skokie Valley bypass route circa 1925.This explains the peculiar appearance compared to the typical C&NW interlocking tower. I believe it was built by CNS&M but that C&NW exercised their prerogative as senior railroad to man the tower.

The interurban abandoned in 1963, and the plant was simplified accordingly.

Incidentally, C&NW parlance was Tower "KO", not "KO" Tower. 

I do not have a closing date for "KO", but I believe its end came around 1986 after C&NW had dropped timetable and train order operation, replacing it with Direct Traffic Control.

Zachary commented on his posting
Looks like a hell of place at one time!!
Obviously the CSN&M is now the Skokie Valley Bike Path in this area.

Russ Fierce commented on the posting
Here's a picture I found. Looks like much more recent.
You can see the tower near the bottom of this aerial.
1939 Aerial Photo from ILHAP

NS/Erie Portage Bridge over Genesee River near Portageville, NY

(Bridge Hunter, Historic BridgesStreet View, Rail Pictures, Facebook Album of 13 Photos)

Sherman Cahal has written a history of the bridge at the Bridge Hunter link above.

Construction activity for its replacement has already started appearing in satellite images.
Test Train, photo taken on July 31, 1875, from Bridge Hunter
The original wrought-iron bridge looks so spindly. Obviously the rebuilds with steel in 1903 and more steel in 1944 were extensive.

HAER NY,61-PORT,1--2 from Photos from HAER NY,61-PORT,1-

Norfolk Southern Corp. (source link is broken)
Construction continues on the 900-foot replacement of the Portageville Bridge in Letchworth State Park. The new $70 million steel arch railroad bridge will be the cornerstone of a vibrant Norfolk Southern rail line that helps businesses in Buffalo and the Southern Tier regions connect with markets east and west. NS’ partnership with New York to replace the Portageville Bridge provides the foundation to better serve and support the region’s economy. 

Modjeski and Masters photo from ConstructionEquipmentGuide from posting