Author Topic: Trains on floating bridges  (Read 414 times)

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Iain

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Trains on floating bridges
« on: March 12, 2019, 02:29:57 AM »
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I mean, light rail, but still, an engineering challenge.

Thanks much,
Mairi Dulaney, RHCE
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Philip H

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Re: Trains on floating bridges
« Reply #1 on: March 12, 2019, 07:36:23 AM »
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having been on those bridges repeatedly I think this is a nifty approach.  It will be very cool to watch it get built.  Perhaps if we start a petition now we can get a rail cam installed on the Seattle side facing Mercer Island?
Philip H.
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p51

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Re: Trains on floating bridges
« Reply #2 on: March 12, 2019, 02:24:37 PM »
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A couple of those bridges have sank in WA state.
The 520 bridge, just north of there, spectacularly sank in 1990: https://en.wikipedia.org/wiki/Lacey_V._Murrow_Memorial_Bridge#1990_disaster
/>And: https://en.wikipedia.org/wiki/Hood_Canal_Bridge#1979_sinking

Chris333

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Re: Trains on floating bridges
« Reply #3 on: March 12, 2019, 02:42:58 PM »
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Wait the bridge sunk while they were building another one and now they are trying to make a railroad bridge as well   :facepalm:

Mike C

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Re: Trains on floating bridges
« Reply #4 on: March 12, 2019, 05:48:47 PM »
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A couple of those bridges have sank in WA state.
The 520 bridge, just north of there, spectacularly sank in 1990:

Sounds more like a 420 bridge  :D

nickelplate759

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Re: Trains on floating bridges
« Reply #5 on: March 12, 2019, 10:40:08 PM »
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A couple of those bridges have sank in WA state.
The 520 bridge, just north of there, spectacularly sank in 1990: https://en.wikipedia.org/wiki/Lacey_V._Murrow_Memorial_Bridge#1990_disaster
/>And: https://en.wikipedia.org/wiki/Hood_Canal_Bridge#1979_sinking

To be fair, it sank while it was being demolished, and likely already compromised.
This bridge, also in Washington on the other hand, sank while it was in use:
 
George

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Doug G.

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Re: Trains on floating bridges
« Reply #6 on: March 12, 2019, 10:59:24 PM »
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The Russians did it!

:D

Doug
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nkalanaga

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Re: Trains on floating bridges
« Reply #7 on: March 13, 2019, 01:58:20 AM »
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One of the Seattle floating bridges did sink, while in use, but it was human error.  Someone left a hatch open on a pontoon, and enough rain got in to sink the bridge.  It didn't sink all the way, just enough to close the road, and was easily pumped out.

These bridges cross a lake, not the ocean, and while wind and waves can close them, they're not nearly as unstable as they may seem.
N Kalanaga
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Doug G.

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Re: Trains on floating bridges
« Reply #8 on: March 13, 2019, 03:20:49 AM »
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At one time, many years ago, from 1882 to 1951, the Milwaukee Road had a pontoon bridge at Reed's Landing on the Mississippi River between Minnesota and Wisconsin.

Doug
« Last Edit: March 13, 2019, 03:47:13 AM by Doug G. »
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x600

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Re: Trains on floating bridges
« Reply #9 on: March 13, 2019, 11:15:05 PM »
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  "Bridges aren't suppose to float" said my brother from New York, as we crossed the Hood Canal Floatingbridge.


Greg O