Question/Dilemma about High Bridge Construction...?

[NW Mailing List]

I read some time ago that the bridge was built to accomodate double 
track,but that the plans to put in the double track never came to be.

JB Farley


Could it possibly be that there were plans to double track the bridge?  
I recall hearing something about that at one time.   Alan Cox
 

In a message dated 5/7/2014 9:18:56 A.M. Eastern Daylight Time, 
nw-mailing-list at nwhs.org writes:

Guys
Can you help unravel this mystery?
Why are the High   Bridge Rails off to one side of the towers now as 
opposed to directly in the   center of the towers originally as seen in
the Vail pics attached   below.

Bob Flippen

Moderator:
 http://nwhs.org/mailinglist/2014/20140507.hb.3.jpg
 http://nwhs.org/mailinglist/2014/20140507.hb.4.jpg
 http://nwhs.org/mailinglist/2014/20140507.hb.5.jpg
 http://nwhs.org/mailinglist/2014/20140507.hb.22.jpg
------------------------------

In Vail's photos, it appears that the     bridge spans were laid in the 
center of the towers, as is clearly shown in     the first attached file
(and many of his other photos).  The girders     of the span run right 
across the two stiffeners (or whatever they are) in     the center of 
the
cross-girder at the top of the bridge     bents/towers.

BUT...  today the bridge spans run along one side     of the towers, as 
clearly shown in the 2nd and 3rd attachments.  The     spans do not run
directly over the two stiffeners in the center of the     cross-girder. 
 And, in fact, in Vail's photo of the new and old bridge     together 
(4th
attached), the girders of the new bridge clearly rest on     the 
outside of the tower.  This makes sense since the bridge was     
constructed to
support two tracks.

So what am I missing???  I     looks like the constructed spans on 
which the steam crane rode to install     the top section of the bents 
and the
next bridge spans isn't in the same     position as the final bridge 
spans!  Were these spans temporary to     support the installation, and 
then
moved?  Nothing is mentioned of     moving the spans later, and that 
seems like it would be a waste of time and     energy.  And Vail's 
photo of the complete bridge shows the spans in     place on the towers 
as we see them today.  I'm obviously missing     something!




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-----Original Message-----
From: NW Mailing List <nw-mailing-list at nwhs.org>
To: nw-mailing-list <nw-mailing-list at nwhs.org>
Sent: Thu, May 8, 2014 4:43 am
Subject: Re: Question/Dilemma about High Bridge Construction...?



Could it possibly be that there were plans to double track the bridge?  
I recall hearing something about that at one time.   Alan Cox
 

In a message dated 5/7/2014 9:18:56 A.M. Eastern Daylight Time, 
nw-mailing-list at nwhs.org writes:

Guys
Can you help unravel this mystery?
Why are the High   Bridge Rails off to one side of the towers now as 
opposed to directly in the   center of the towers originally as seen in
the Vail pics attached   below.

Bob Flippen

Moderator:
 http://nwhs.org/mailinglist/2014/20140507.hb.3.jpg
 http://nwhs.org/mailinglist/2014/20140507.hb.4.jpg
 http://nwhs.org/mailinglist/2014/20140507.hb.5.jpg
 http://nwhs.org/mailinglist/2014/20140507.hb.22.jpg
------------------------------

In Vail's photos, it appears that the     bridge spans were laid in the 
center of the towers, as is clearly shown in     the first attached file
(and many of his other photos).  The girders     of the span run right 
across the two stiffeners (or whatever they are) in     the center of 
the
cross-girder at the top of the bridge     bents/towers.

BUT...  today the bridge spans run along one side     of the towers, as 
clearly shown in the 2nd and 3rd attachments.  The     spans do not run
directly over the two stiffeners in the center of the     cross-girder. 
 And, in fact, in Vail's photo of the new and old bridge     together 
(4th
attached), the girders of the new bridge clearly rest on     the 
outside of the tower.  This makes sense since the bridge was     
constructed to
support two tracks.

So what am I missing???  I     looks like the constructed spans on 
which the steam crane rode to install     the top section of the bents 
and the
next bridge spans isn't in the same     position as the final bridge 
spans!  Were these spans temporary to     support the installation, and 
then
moved?  Nothing is mentioned of     moving the spans later, and that 
seems like it would be a waste of time and     energy.  And Vail's 
photo of the complete bridge shows the spans in     place on the towers 
as we see them today.  I'm obviously missing     something!




________________________________________
NW-Mailing-List at nwhs.org
To   change your subscription go   to
http://list.nwhs.org/mailman/options/nw-mailing-list
Browse the   NW-Mailing-List archives   at
http://list.nwhs.org/pipermail/nw-mailing-list/

________________________________________NW-Mailing-List at nwhs.orgTo 
change your subscription go 
tohttp://list.nwhs.org/mailman/options/nw-mailing-listBrowse the 
NW-Mailing-List archives 
athttp://list.nwhs.org/pipermail/nw-mailing-list/