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Author Topic: Fort Pitt, Chatham.  (Read 86065 times)

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Offline kyn

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Re: Fort Pitt, Chatham.
« Reply #145 on: December 20, 2016, 19:54:02 »
A sewer vent is possible, they had/have Victorian ones surviving in Dover.  Initially the basement of the casemates beside this was where all the waste went, but was shovelled out once full.  Would make sense that they still needed vents and may have put one in if a sewer was added here at a later date.

Still would show as a vent on plans though!


Offline smiffy

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Re: Fort Pitt, Chatham.
« Reply #143 on: December 20, 2016, 15:05:19 »
If it was still there in the 1920's I can only assume it was demolished in the 1930's along with the blockhouse. Whatever this was, there is probably a closer picture or a record of it somewhere. For anyone to actually remember seeing it (perhaps one of the Technical school girls) they would probably have to be about ninety or more by now.

Offline kyn

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Re: Fort Pitt, Chatham.
« Reply #142 on: December 20, 2016, 10:00:53 »
There are plans earlier in the thread that shows the railway tunnel's position away from the fort.

I did wonder if this could have been a water tower but these are usually marked on a plan and none of the plans I have show this, they often show a well too but none are marked.

Offline jimawilliams

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Re: Fort Pitt, Chatham.
« Reply #141 on: December 19, 2016, 21:34:29 »
A couple of interesting considerations.

I came across "Minutes of Evidence Given Before the Select Committee on Railway Bills The North Kent Lines 1845." 
Page 190 pays reference to the then  proposed tunnel/s under Fort Pitt.

https://books.google.com.au/books?id=iLg5AQAAMAAJ&pg=PA183&lpg=PA183&dq=vignoles+kent&source=bl&ots=UxRzoU6VLW&sig=xq7XHn-vgwNMKjHgGgfJG071_3E&hl=en&sa=X&ved=0ahUKEwjY0N_8jYHRAhWHjpQKHcHOBs8Q6AEIGzAA#v=snippet&q=two%20tunnells&f=false

The image from Google Earth shows approximate location of the existing tunnel (red line) and structure in question (yellow cross).
"Change is the only constant"

Offline Stewie

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Re: Fort Pitt, Chatham.
« Reply #140 on: December 18, 2016, 21:40:03 »
Hi Keith

I would agree with you about the length of tunnel and the requirement for an air vent, Fort Pitt Tunnel is not long but is curved. Now my discipline is signalling and not civil engineering, so I may be wrong, but my understanding is that most air shafts started life as an access shaft to a inner point of the tunnel to enable it to be constructed faster, the curve may be relevant in this case. That said, the few times I walked through this tunnel in the 80's I never noticed signs of an air vent and the structure in the picture does not seem to be on the alignment anyway.
One other thing, I read a book about railways through the Medway Towns once but cannot remember the title. This book stated that the London, Chatham & Dover railway considered building a branch line to Chatham Dockyard from Chatham station with points in Fort Pitt tunnel. This application was opposed by the military because they considered that this work would undermine the foundations of Fort Pitt, so is the alignment on Google maps accurate?

As an aside, there is a terrific article on building Victorian railway tunnel on the 'Forgotten Relics of an Enterprising Age' website demonstrating the techniques. I have included a link here:
 
http://www.forgottenrelics.co.uk/tunnelvision/index.html

:-)

KeithJG

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Re: Fort Pitt, Chatham.
« Reply #139 on: December 18, 2016, 16:58:59 »
Surely that tunnel is too short  to need a vent?

Offline Stewie

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Re: Fort Pitt, Chatham.
« Reply #138 on: December 15, 2016, 17:46:25 »
Whatever it is it seems to be made of a dark coloured material compared to the other structures nearby. Could it be a military memorial or commemoration tower?

Offline smiffy

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Re: Fort Pitt, Chatham.
« Reply #137 on: December 15, 2016, 15:43:06 »
This is the only other clear(ish) view I can find.

Offline kyn

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Re: Fort Pitt, Chatham.
« Reply #136 on: December 15, 2016, 11:58:21 »
None of my plans show this structure so I would assume it wasn't part of the fort.  However, as previous plans show this is definitely not part of the railway tunnel either!

Sorry I can't help, but I am intrigued as to what this is!

Offline jimawilliams

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Re: Fort Pitt, Chatham.
« Reply #135 on: December 14, 2016, 20:50:57 »
1940 Google Earth appears to show some evidence of it remaining.
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Offline smiffy

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Re: Fort Pitt, Chatham.
« Reply #134 on: December 14, 2016, 20:32:12 »
You're right about the college car park, if it still existed it would be right in the middle of it. I thought about a vent for the railway tunnel but as you say it's well to the north of this location.

I've outlined it in red here on a map overlay, you can see the route of the tunnel at the top of the picture.


Offline Stewie

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Re: Fort Pitt, Chatham.
« Reply #133 on: December 14, 2016, 19:52:33 »
By my reckoning the structure is now on the site of the Art college car park but I think Fort Pitt tunnel passes to the North of this point. I have to confess I was not aware of this tunnel having an air vent and usually their original purposes was to allow the tunnel to be dug from a mid point as well as from the portals in so would be situated vertically above the tunnel.

Offline Stewie

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Re: Fort Pitt, Chatham.
« Reply #132 on: December 14, 2016, 19:44:27 »
It does look like a tunnel vent but not sure it is on the alignment of the railway?

Offline Longpockets

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Re: Fort Pitt, Chatham.
« Reply #131 on: December 14, 2016, 19:23:46 »

I may have the wrong orientation of the site but is it a vent to the railway tunnel?


 

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