Friday, June 2, 2017

CP 1912 Trestle over Old Man River at Lethbridge, AB

(Satellite, Steve Boyko blog)

Bob Kline posted
Lethbridge, Alberta, circa 1908. "Erecting Lethbridge Viaduct over the Oldman River." 8x10 inch glass negative. So that's how they did it.....
Richard Koenig Never saw this before: a big template is used, begin at bottom and work up.
Jeff Bransky The big rectangular framework at the top is like a template or armature but it is also scaffolding for workers to stand on. Very impressive. I like seeing the men standing at ground level and on the concrete pads for a feeling of scale. It is also interesting to see the large moveable crane reaching way out to build the vertical support structure that is nearing completion.
 
Street View

Satellite
The curved black line you see in the overall satellite image referenced above is a shadow of the deck. If you zoom in, you can see the deck, piers, and trestle steel.  On the south side the trestle steel is clearly visible because it does not have the confusion caused by the shadows.
Jeff Bransky commented on the above posting
Jeff Bransky This photo reveals the finished viaduct where you can see the spacing of the framework modules easier. In addition, the B&W construction photo shows temporary bracing on the sides of the end structure which was later removed. If you look below the smaller steam crane in the construction shot, you can see men on scaffolds working. They may be painting the bridge. I'm assuming the rivets were previously installed in the area where they are working. To see more photos visit this site which also shows the river in flood stage:
http://dailyphotodose.com/tag/high-level-bridge/

[Note the man standing on the front pier in the first photo. The flood pictures show the water almost covering those piers. So the river level is up about 15-20 feet.]


safe_image for Mike Dunham-Wilkie Flickr

Savoie Photography posted three photos with the comment: "Grabbed a few more shots of the Holiday Train Leaving over the High Level Bridge tonight. Thanks again CP Rail for bringing this unique train by for us to enjoy !"
Joe Dockrill shared
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Jeff Bransky commented on the above posting

Jeff Bransky commented on the above posting
Photo by J.Chong from a blog posting on Canadian rail scenes
In Lethbridge, 150 km. south of Calgary, there is still an active rail line on top of the world’s highest freestanding iron black trestle bridge. The rail bridge  straddles the natural dips of prairie grassy coulees.  This iron trestle bridge is a tourist attraction since such structures are rare in Canada, even in North America. We wandered into the grassy parkland, in the dying summer heat of 30 degrees C  at sunset. Quite stunning.
Western Canadian History posted
1908 ~ CPR's Lethbridge Viaduct while under construction showing the "traveller", a custom built crane on wheels, in position for the next section to soon be erected.
Finished in August of 1909 and at just over a mile in length, this is the world's largest steel structure of its kind. It may appear frail, but this bridge was purposely over-engineered and is still in constant use today.
https://en.wikipedia.org/wiki/Lethbridge_Viaduct
Brent Laing And takes a while to re-tie.
Jay Bird Took 4 years last time... the only work in the summer...
Nicola Miller Was the river temporarily dammed? Very low flow.
Western Canadian History Those footings you see in the photo were placed when the river was low by building caissons or by a simple diversion, first to one side, then the other.
Kevin Wiber The first attempt was "derailed" by spring flooding

Robert D Austin Jr posted two photos with the comment: "Still in use--longest trestle in western Canada.  Lethbridge High Bridge!     Built in 1912."
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Korey Hodel posted three photos with the comment:
I'm sure this viaduct in Lethbridge Alberta has probably been posted here before 😆 (sorry no train going across when I was there)
It's just over 5,327 feet long and 314 feet above the riverbed.
I snapped these pictures a few years back when we went for a car show
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Aaron MacDonald commented on Korey's post, cropped
It looks a lot bigger when your right there than in photo hahahaha



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Update: this is the featured bridge in A Brief History of High Railway Bridges.

Donald Mattson shared three photos of the Holiday Train parked on the bridge.

Luc Regis posted several photos. (The link is public, click it. I'm too far behind to copy the photos.)





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