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Portageville Bridge Update
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   Portageville Bridge Update
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   Author  Topic: Portageville Bridge Update  (Read 2345 times)
HwyHaulier
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Posts: 3444
Re: Portageville Bridge Update
 
« Reply #20 on: Jul 18th, 2017, 1:42pm »
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Henry - Lodge Members - Et Al -
 
Which, in this instance, your writer respects the commonplace Employee Rule Book. It counseled, among other issues:  
Respect the third rail! Also, on the old PENN, a Rule that one should avoid contact with the catenary!
 
So it goes. Your writer seasoned enough with past sightings of the long gone, green ERIE passenger schedules traveling  
the NY Southern Tier...
 
..............  Vern  ................


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Ticket Agent serving...Pacific Stage Lines...Washington State System...Mt. Hood Stages...Pickwick Stages...Transcontinental & Western Air Lines.... Admitted Gold Bug..... Observant Orthodox Mossback..... H.M.R.A.O. Curmudgeons......
roc
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Posts: 1271
Re: Portageville Bridge Update
 
« Reply #21 on: Jul 20th, 2017, 5:42am »
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Actually, in this case, the third rail when the rule breaker in the first instance stepped on it wasn't energized. In the name of rail heritage preservation and quoting an actual founding father (ie double quotes), rather than incorrectly single quoting, the person in the second instance sent some current…
 
Snore.


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thebigham
Historian
Posts: 1297
Re: Portageville Bridge Update
  635817144512761264-PortagevilleBridge.jpg - 75515 Bytes
« Reply #22 on: Jul 24th, 2017, 2:24pm »
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The old bridge is being torn down. Too much liability for the park and NYS.
 
This will be the new view.


http://Forums.Railfan.net/Images/WNYP/635817144512761264-PortagevilleBridge.jpg
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roc
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Posts: 1271
Re: Portageville Bridge Update
 
« Reply #23 on: Jul 25th, 2017, 11:08pm »
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Will change the view for the better.

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A smokey Alco and a good camera, nevermind the weather...
George_Harris
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Posts: 3828
Re: Portageville Bridge Update
 
« Reply #24 on: Jul 31st, 2017, 9:45pm »
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on Jul 13th, 2017, 7:45pm, Matthew_L wrote:       (Click here for original message)
IIRC, NS has stated the speed limit for the new bridge will be 30 mph. While it's not 50 mph (the norm for the rest of the line), the 30 mph seed limit will be a reat improvement over the current 10 mph speed limit.

Found a track chart for this line at the following:
http://www.multimodalways.org/docs/railroads/companies/CR/CR%20Track%20Charts/CR%20Albany%20Track%20Chart%201996.pdf
The specific location is page 142 of the file, page number shown is 102, mileposts 360 to 370, the current speed limit for the line is 50 mph where not otherwise restricted and 30 mph each side of the bridge and 10 mph on the bridge itself.  Curves adjacent to the bridge are shown as 2 degrees 15 minutes east of the bridge and 7 degrees west of the bridge.  It appears that the 30 mph limit is through these curves.  
 
For information, the balancing superelevation at 30 mph would be:
(This is using the normal formuly, SE = 0.0007 * degree of curve * speed^2)
For 2d15m, balancing SE= 1.42 inches
For 7 degree, balancing SE = 4.41 inches
Converting degrees of curve to radius:  
2d15m = 2546.64 feet
7deg = 819.02 feet


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Henry
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Posts: 6129
Re: Portageville Bridge Update
  PortagevilleViaduct_CR_TrackChart_1996.jpg - 225710 Bytes
« Reply #25 on: Jul 31st, 2017, 11:59pm »
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Here is the above referenced track chart page from 1996. The speeds for the bridge are near the right side of the long rectangle. I actually downloaded a whole pile of CR track charts back in 2009.



Image exceeds display size of 900 pixels wide. (225710 bytes, 1576x1338 pixels)


Click Here to View Image PortagevilleViaduct_CR_TrackChart_1996.jpg - 225710 Bytes


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centercab
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Posts: 280
Re: Portageville Bridge Update
 
« Reply #26 on: Aug 9th, 2017, 9:48pm »
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on Jul 25th, 2017, 11:08pm, roc wrote:       (Click here for original message)
Will change the view for the better.

Agree. Old bridge would become "clutter" as per the bighams projected view of new structure. Progress in this case is good, new  bridge is elegant


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roc
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Posts: 1271
Re: Portageville Bridge Update
 
« Reply #27 on: Aug 16th, 2017, 2:53am »
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on Aug 9th, 2017, 9:48pm, centercab wrote:       (Click here for original message)

Agree. Old bridge would become "clutter" as per the bighams projected view of new structure. Progress in this case is good, new  bridge is elegant

 
The Kinzua Viaduct tragedy also comes to mind. That said, perhaps a truncated section of the bridge. That, however, would take major bucks that would be better spent on road maintenance (no new roads please) and transit.


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centercab
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Posts: 280
Re: Portageville Bridge Update
 
« Reply #28 on: Aug 16th, 2017, 7:47pm »
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Major bucks aside, I remember the complete Kinzua  Bridge, walked it several times. Historically even the remains have are significant but honestly it's only a shadow of it's former self.

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roc
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Posts: 1271
Re: Portageville Bridge Update
 
« Reply #29 on: Aug 17th, 2017, 3:53pm »
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on Aug 16th, 2017, 7:47pm, centercab wrote:       (Click here for original message)
Major bucks aside, I remember the complete Kinzua  Bridge, walked it several times. Historically even the remains have are significant but honestly it's only a shadow of it's former self.

 
Walked it with the family back before the K&K and then rode over it with Grandpa from Marienville and back. From Kane would have been fine  


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thebigham
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Posts: 1297
Re: Portageville Bridge Update
  letchworth.jpg - 96744 Bytes
« Reply #30 on: Aug 26th, 2017, 10:17am »
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Let's try these NS pics again

http://Forums.Railfan.net/Images/WNYP/letchworth.jpg
Click Image to Resize

« Last Edit: Aug 26th, 2017, 10:17am by thebigham » Logged
thebigham
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Posts: 1297
Re: Portageville Bridge Update
  rsz_letchworth2.jpg - 216413 Bytes
« Reply #31 on: Aug 26th, 2017, 10:19am »
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Let's try these NS pics again

http://Forums.Railfan.net/Images/WNYP/rsz_letchworth2.jpg
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roc
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Posts: 1271
Re: Portageville Bridge Update
 
« Reply #32 on: Aug 26th, 2017, 11:09pm »
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Simply amazing. Compared to the spindly legged old girl, which lasted well over 100 years, the new bridge looks like it could last at least twice as long.
 
That said, it took less than two months to build the original metal bridge — no labor laws, let alone unions or OSHA.  
 
For what it's worth, the original wooden bridge took roughly 13 months to construct. Apparently, construction of the approaches, abutments, and piers are the difference.
 
https://en.m.wikipedia.org/wiki/Portage_Viaduct#Current_Portageville_Viaduct


« Last Edit: Aug 26th, 2017, 11:11pm by roc » Logged

A smokey Alco and a good camera, nevermind the weather...
George_Harris
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Posts: 3828
Re: Portageville Bridge Update
 
« Reply #33 on: Aug 27th, 2017, 6:41pm »
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on Aug 26th, 2017, 11:09pm, roc wrote:       (Click here for original message)
Simply amazing. Compared to the spindly legged old girl, which lasted well over 100 years, the new bridge looks like it could last at least twice as long.

But for the last 30 to 50 years of this life, keeping the existing bridge usable required operating restrictions both speed and weight, and careful and frequent, and in the last quite a few years, near continuous inspection and maintenance.  Speed of construction of the current steel bridge was fast because, first it was built on the foundations of the preceeding wood bridge and with the urgency of getting the line back in service quickly even if not the most efficient and economical way both in materials and manpower.


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thebigham
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Posts: 1297
Re: Portageville Bridge Update
  rsz_1letchworth10.jpg - 114455 Bytes
« Reply #34 on: Aug 28th, 2017, 10:26am »
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John Kucko picture

http://Forums.Railfan.net/Images/WNYP/rsz_1letchworth10.jpg
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centercab
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Posts: 280
Re: Portageville Bridge Update
 
« Reply #35 on: Sep 3rd, 2017, 8:43pm »
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" it was built on the foundations of the preceeding wood bridge"
Can you imagine what those original wood bridge builders would have thought if told their work would be put to use 100+ years in the future? I guess that's what is called a lasting legacy!


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towny72
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Re: Portageville Bridge Update
 
« Reply #36 on: Sep 4th, 2017, 10:31am »
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Thank you for posting progress photos.  
 
Politics and history aside this is a very impressive build. I see a lot of "small" spans being replaced around the NS system but nothing to this magnitude.  
 
 
As always those willing to do the leg work to document such events are appreciated.


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thebigham
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Posts: 1297
Re: Portageville Bridge Update
  rsz_1aa1.jpg - 74348 Bytes
« Reply #37 on: Sep 12th, 2017, 1:59pm »
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John Kucko picture

http://Forums.Railfan.net/Images/WNYP/rsz_1aa1.jpg
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thebigham
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Posts: 1297
Re: Portageville Bridge Update
  letchworth20.jpg - 49608 Bytes
« Reply #38 on: Sep 26th, 2017, 6:47pm »
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Eagle One Photography

http://Forums.Railfan.net/Images/WNYP/letchworth20.jpg
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thebigham
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Posts: 1297
Re: Portageville Bridge Update
  letchworth50.jpg - 150857 Bytes
« Reply #39 on: Oct 6th, 2017, 7:57pm »
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Taken today, Oct. 6th

http://Forums.Railfan.net/Images/WNYP/letchworth50.jpg
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