Dennis Weber posted A Look @ Freight Cars on CP's Mississippi River Bridge LaCrescent,Mn. 9-2017 CP Train 471.
Originally, it was steam powered. It was converted to electricity in 1952. It is staffed 24/7. [Historic Bridges] It was rebuilt in 1928. The US Coast Guard condemned it in 1998 and ordered that the swing span be replaced with a lift span. So far the replacement has been just talk. This is one of four bridges that island-hops across the Mississippi and Black Rivers between La Crosse, WI and LaCrescent, MN. "La Crosse is one of three places that the Amtrak Empire Builder passenger train crosses the Mississippi River, with the other two being Hastings, MN, and Little Falls, MN." [Weeks]
I'm not exactly sure where this bridge falls for priority. It's a critical line for oil and freight to and from Chicago. However, it depends on who's paying for the replacement (and it probably won't be the railroad). If it's paid for by the coast guard (who is the only ones who want it replaced, due to the navigation channel), it may be a while. It's behind Clinton, Iowa and likely Dubque, Iowa for replacement due to narrow navigation channels. However, the railroad intends to double track the bridges here and further up the river at Hastings within the next few decades, so it may happen then. [Bridge Hunter, Posted September 23, 2015, by John Marvig]
HeavyMovableStructures, Photo 3 in Home Page scroll [The photo is not identified, but it sure looks like this bridge. Unfortunately, the link I was after, http://www.heavymovablestructures.org/assets/technical_papers/Alteration-of-the-Canadian-Pacific-Railway-Drawbridge.pdf, is broke. Poking around the site quickly comes to "Under Construction" text.]
( Bridge Hunter , Historic Bridges , HAER , Satellite ) P&LE = Pittsburgh & Lake Erie Railroad Photo from HAER PA,4-BEAV,1--1 from pa3716 One of 26 images posted by Mike Brady [Many of the images show the stresses calculated for each member of the truss.] Pictures are of the original Stress sheet of the P&LE cantilever bridge at Monaca - Beaver PA . Appears to be drawn on vellum type paper using a ink well pen. All of the math about the bridge is here. Live load,dead load, impact load and wind load Date is Jan. 31, 1908. Bought this on eBay around 20 years ago. Was unaware at the time of purchase of what I was getting. Wow, when I actually received it. Total calculated design load on one of the main bearings is 11,994.000 or 12 million pounds or ( 6 thousand tons). One of 26 images posted by Mike Brady Photo taken by Bob Harris in May 2012 from Bridge Hunter ( new window ) Mark Arnold posted five photos with the comment: " CSX's Ohio River cross...
( Bridge Hunter ; no Historic Bridges; Bridge & Tunnels ; HAER ; Satellite ) WNYP = Western New York & Pennsylvania Railroad (leased from Norfolk Southern) This bridge carried Pennsy's mainline between Pittsburgh and Buffalo. Most of that line has been abandoned, but one of the original two tracks that were on this bridge is still used by the WNYP. Photo from HAER PA,61-OICI,2--2 from pa1273 July 1971. AERIAL RECONNAISSANCE II, ERIE RAILWAY SURVEY. - Pennsylvania Railroad, Allegheny River Bridge, River Street vicinity, Oil City, Venango County, PA [It is Pennsy's roundhouse. Erie was on the other side of the river. My understanding of the comments on the following posting is that the modern building on this side of the old building was part of the shops building. The modern part was retained and repurposed as the Oil City Warehouse Mall .] Carl Venzke posted Pennsylvania Railroad, Allegheny River Bridge, River Street vicinity, Oil...
( Satellite , three slips allowed them to make six ships at a time because they were launched sideways.) Later, they switched to fewer, but bigger ships. They were built in a dry dock and then floated out. Pete Martin posted My grandfather in drydock 2 at shipyard. Prob 1966. Dennis DeBruler It started as Chicago Shipbuilding Co. in 1890. https://chicagology.com/harbor/chicagoshipbuildingco/ Tony Margis posted Chicago_Tribune_Sun__Feb_21__1960_ Laura Findeisen Layman I remember seeing these in dry dock. Rod Sellers posted View from the Skyway by Daily Calumet photographer, June 5 1974
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