4BM4 derailed north of Coffs Harbour

 
  bevans Site Admin

Location: Melbourne, Australia
Pacific National 4BM4 lead by NR39/NR43/ANX has derailed at nanaglen north of Coffs Harbour.  Northern Line blocked, NR39 off the rails and on its side.

Not sure of the crew hopefully they are ok.

Wagons in various places along the track derailed.

VIDEO: http://dams.omni.com.au:8080/razuna/assets/2/76F0E07E9F864DCFB7A9A9B57DB71365/vid/0927B438361B4E8DAF6F8AC17D82C8F5/10000000_1527535924103182_8149387364917914523_n.mp4

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  bevans Site Admin

Location: Melbourne, Australia
This aerial footage captures the scale and complexity of the goods train derailment this morning near Nana Glen on the state’s Mid North Coast. Crews are still on scene and the incident is expected to be ongoing for a number of days.

https://fb.watch/3SYpSfmEg3/
  Fatty Deputy Commissioner

Location: Melbourne
Not sure of the crew hopefully they are ok.
bevans

Crew are OK. The lead loco didn't derail.
  freightgate Minister for Railways

Location: Albury, New South Wales
The 3rd loco is AN3.
  bevans Site Admin

Location: Melbourne, Australia
More photos:













  YM-Mundrabilla Minister for Railways

Location: Mundrabilla but I'd rather be in Narvik
Pacific National 4BM4 lead by NR39/NR43/ANX has derailed at nanaglen north of Coffs Harbour.  Northern Line blocked, NR39 off the rails and on its side.

Not sure of the crew hopefully they are ok.

Wagons in various places along the track derailed.
bevans
I wonder about the engine numbers and sequence if NR 39 was leading and is on its side:
  • Where are the second and third engines in the aerial photos?
  • Why was it long end leading?
Just wondering if it is the third loco that is on its side or did I just make all of this up.
Happy, as always, to be corrected.
  YM-Mundrabilla Minister for Railways

Location: Mundrabilla but I'd rather be in Narvik
The 3rd loco is AN3.
freightgate
????
  freightgate Minister for Railways

Location: Albury, New South Wales
Meant to say AN3 was the AN class loco invoked and may have been second unit?
  r_rogel Junior Train Controller

What are the wagons involved in the derailment?
  nscaler69 Deputy Commissioner

Location: There are no stupid questions, but there are a lot of inquisitive idiots.
I wonder about the engine numbers and sequence if NR 39 was leading and is on its side:
  • Where are the second and third engines in the aerial photos?
  • Why was it long end leading?
Just wondering if it is the third loco that is on its side or did I just make all of this up.
Happy, as always, to be corrected.
YM-Mundrabil
If you watch the fb video in the 2rd reply the lead 2 locos NR43 & AN3 are about 200 metres further along the track, with NR39 is lying on it's side.
  YM-Mundrabilla Minister for Railways

Location: Mundrabilla but I'd rather be in Narvik
I wonder about the engine numbers and sequence if NR 39 was leading and is on its side:
  • Where are the second and third engines in the aerial photos?
  • Why was it long end leading?
Just wondering if it is the third loco that is on its side or did I just make all of this up.
Happy, as always, to be corrected.
If you watch the fb video in the 2rd reply the lead 2 locos NR43 & AN3 are about 200 metres further along the track, with NR39 is lying on it's side.
nscaler69
Thanks Nscaler69. Hidden (almost)  under the Fire Rescue logo:).
As is so often the case the lead locos, thankfully, got through what I assume might be a washaway.
  bevans Site Admin

Location: Melbourne, Australia
8120 the shunter from Arcacia Ridge went south to retrieve BS6.

MB1 has returned south to Newcastle to stable.
  theanimal Chief Commissioner

8120 the shunter from Arcacia Ridge went south to retrieve BS6.

MB1 has returned south to Newcastle to stable.
bevans
I actually wonder if the track bed was waterlogged and the units helped it liquify and the track then slumped?

Anyway time will tell.
  NSWGR8022 Chief Commissioner

Location: From the lands of Journalism and Free Speech
This derailment as featured on the Channel 7 and ABC TV news.  There is much flooding around the area with rainful level over 300mm in some areas on the north coast.





It will be some time before you can get teams safely into the area and with the ground being so soft this would also have helped to minimise the damage to NR39.

  hairylegs2 Station Master

YM-Mundrabilla
Yes, washaway. The washed out track can be seen in some of the pics.

https://postimg.cc/xJGsGdC9

  hairylegs2 Station Master

theanimal
It was a washaway. The track was washed off its alignment. Very lucky that the two leading locos got over it.
  hairylegs2 Station Master

If you watch the fb video in the 2rd reply the lead 2 locos NR43 & AN3 are about 200 metres further along the track, with NR39 is lying on it's side.
nscaler69
The leading locos can be seen here...

https://postimg.cc/K1WNSMV9

  YM-Mundrabilla Minister for Railways

Location: Mundrabilla but I'd rather be in Narvik
Yes, washaway. The washed out track can be seen in some of the pics.

https://postimg.cc/xJGsGdC9
hairylegs2
Thanks Hairylegs2.
The photo pretty much says it all especially the ballast movement.
  simstrain Chief Commissioner

Of course the ARTC will probably take the cheap option and just rebuild the earthbank instead of using culverts to allow water to flow through.
  hairylegs2 Station Master

Of course the ARTC will probably take the cheap option and just rebuild the earthbank instead of using culverts to allow water to flow through.
simstrain
Given there have been washaways at this location before, a culvert is obviously needed. There are also other locations between Nana Glen and Glenreagh where there have been washaways in the past. For that matter there would be other locations throughout the North Coast. It only happens when there is torrential rain in a particular catchment.
  simstrain Chief Commissioner

Given there have been washaways at this location before, a culvert is obviously needed. There are also other locations between Nana Glen and Glenreagh where there have been washaways in the past. For that matter there would be other locations throughout the North Coast. It only happens when there is torrential rain in a particular catchment.
hairylegs2

This area is often frequented by heavy rain even when we are in drought. It is essentially a rainforrest after all.
  c3526blue Deputy Commissioner

Location: in the cuckoos nest
It was a washaway. The track was washed off its alignment. Very lucky that the two leading locos got over it.
hairylegs2
Not correct.  

The ballast was washed away leaving the track unsupported.  Water flowed from right to left in the photo.  Weight of lead locos caused distortion of trackwork in the vertical and horizontal planes due to lack of support from the ballast, leading to full derailment of the following engine and vehicles.  Track has ended up on the upstream side of its original alignment.  Observation and experience of streamflow and erosion can discern the failure and derailment mechanism.  

Simples.
  c3526blue Deputy Commissioner

Location: in the cuckoos nest
Of course the ARTC will probably take the cheap option and just rebuild the earthbank instead of using culverts to allow water to flow through.
Given there have been washaways at this location before, a culvert is obviously needed. There are also other locations between Nana Glen and Glenreagh where there have been washaways in the past. For that matter there would be other locations throughout the North Coast. It only happens when there is torrential rain in a particular catchment.
hairylegs2
It is obvious there is already a culvert in this embankment.  It appears the design interval for the culvert/opening size was insufficient for this type of event.  To put it another way the culvert opening was too small for the amount of rainfall that occurred in the embankment catchment area.  A review of the design can ascertain the design rainfall interval (if not known).  There is always a balance between cost and design interval conditions.  Bridges generally use a recurrence interval of 100 years, and dam design is moving to 1 in 1,000 years design interval.  Culverts generally use a twenty year design interval.    Washaways will continue to occur unless we massively increase design intervals and consequent construction costs.

What cost/design interval balance should be used?
  YM-Mundrabilla Minister for Railways

Location: Mundrabilla but I'd rather be in Narvik
'... What cost/design interval balance should be used? ...'

Don't worry the ATSB will come up with an answer in about three years.
These days there are no end of remote monitoring set ups and in the meantime track patrols after heavy rain. The late lamented local Ganger would have known but it will all cost money!
  michaelgm Chief Commissioner

Just from aerial pics, water level on both of ROW looks identical.
Possibly more remediation required than just a bigger culvert.

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