In message , at 20:41:41 on Fri, 15 Nov
2019, remarked:
On Fri, 15 Nov 2019 15:17:03 +0000
Roland Perry wrote:
In message , at 14:24:18 on Fri, 15 Nov
2019, Bryan Morris remarked:

I find the Picc unbearably deep, so by the time I've reached Barons
Court (westbound) I'm standing by the door gasping for fresh air. No
other tunnel affects me like that, not even the Chunnel.

I thought the Northern Line Edgware Branch was deepest. I know when I
used to travel via Hampstead/Golders Green my ears used to pop.

That's the deepest under the surface, but the surface is a hill! Air
pressure on the surface there will be lower as a result, by about 2.5%

I think the deepest below sea level (from memory) is the Jubilee between
Westminster and Waterloo.

Later: Hampstead Station is approx 200m above sea level at the surface,
140m above sea level at the platform.

Not it isn't. The highest point of the heath which is well above the tube
station is 134m. I'm guessing the station entrance is around 80-90m.

That's what one gets for looking things up at what turns out to be an
unreliable source. I still believe that the platforms are 60m below the
surface, which a more reliable source puts at 376ft (ie 115m).
--
Roland Perry

In message , Roland Perry
writes
In message , at 20:41:41 on Fri, 15 Nov
2019, remarked:
On Fri, 15 Nov 2019 15:17:03 +0000
Roland Perry wrote:
In message , at 14:24:18 on Fri, 15 Nov
2019, Bryan Morris remarked:

I find the Picc unbearably deep, so by the time I've reached Barons
Court (westbound) I'm standing by the door gasping for fresh air. No
other tunnel affects me like that, not even the Chunnel.

I thought the Northern Line Edgware Branch was deepest. I know when I
used to travel via Hampstead/Golders Green my ears used to pop.

That's the deepest under the surface, but the surface is a hill! Air
pressure on the surface there will be lower as a result, by about 2.5%

I think the deepest below sea level (from memory) is the Jubilee between
Westminster and Waterloo.

Later: Hampstead Station is approx 200m above sea level at the surface,
140m above sea level at the platform.

Not it isn't. The highest point of the heath which is well above the tube
station is 134m. I'm guessing the station entrance is around 80-90m.

That's what one gets for looking things up at what turns out to be an
unreliable source. I still believe that the platforms are 60m below the
surface, which a more reliable source puts at 376ft (ie 115m).

Hampstead is on a steep hill and the station platforms are the deepest
on the London Underground network, at 58.5 metres (192 ft) below ground
level. It has the deepest lift shaft on the Underground at 55 metres
(180 ft) which houses high-speed lifts.
Source https://en.wikipedia.org/wiki/Hampstead_tube_station
--
Bryan Morris

In message , Bryan Morris
writes
In message , Roland Perry
writes
In message , at 20:41:41 on Fri, 15 Nov
2019, remarked:
On Fri, 15 Nov 2019 15:17:03 +0000
Roland Perry wrote:
In message , at 14:24:18 on Fri, 15 Nov
2019, Bryan Morris remarked:

I find the Picc unbearably deep, so by the time I've reached Barons
Court (westbound) I'm standing by the door gasping for fresh air. No
other tunnel affects me like that, not even the Chunnel.

I thought the Northern Line Edgware Branch was deepest. I know when I
used to travel via Hampstead/Golders Green my ears used to pop.

That's the deepest under the surface, but the surface is a hill! Air
pressure on the surface there will be lower as a result, by about 2.5%

I think the deepest below sea level (from memory) is the Jubilee between
Westminster and Waterloo.

Later: Hampstead Station is approx 200m above sea level at the surface,
140m above sea level at the platform.

Not it isn't. The highest point of the heath which is well above the tube
station is 134m. I'm guessing the station entrance is around 80-90m.

That's what one gets for looking things up at what turns out to be an
unreliable source. I still believe that the platforms are 60m below
the surface, which a more reliable source puts at 376ft (ie 115m).

Hampstead is on a steep hill and the station platforms are the deepest
on the London Underground network, at 58.5 metres (192 ft) below ground
level. It has the deepest lift shaft on the Underground at 55 metres
(180 ft) which houses high-speed lifts.
Source https://en.wikipedia.org/wiki/Hampstead_tube_station

BTW - I used to live in Highgate and frequently travelled Hampstead
Lane/Heath Street to my office . Hampstead station is not at the top of
the Hill (I might be wrong but it's the Pond by the Heath that's
probably the apex) so the line is further under ground there than at the
station.
--
Bryan Morris

Bryan Morris wrote:
In message , Bryan Morris
writes
In message , Roland Perry
writes
In message , at 20:41:41 on Fri, 15 Nov
2019, remarked:
On Fri, 15 Nov 2019 15:17:03 +0000
Roland Perry wrote:
In message , at 14:24:18 on Fri, 15 Nov
2019, Bryan Morris remarked:

I find the Picc unbearably deep, so by the time I've reached Barons
Court (westbound) I'm standing by the door gasping for fresh air. No
other tunnel affects me like that, not even the Chunnel.

I thought the Northern Line Edgware Branch was deepest. I know when I
used to travel via Hampstead/Golders Green my ears used to pop.

That's the deepest under the surface, but the surface is a hill! Air
pressure on the surface there will be lower as a result, by about 2.5%

I think the deepest below sea level (from memory) is the Jubilee between
Westminster and Waterloo.

Later: Hampstead Station is approx 200m above sea level at the surface,
140m above sea level at the platform.

Not it isn't. The highest point of the heath which is well above the tube
station is 134m. I'm guessing the station entrance is around 80-90m.

That's what one gets for looking things up at what turns out to be an
unreliable source. I still believe that the platforms are 60m below
the surface, which a more reliable source puts at 376ft (ie 115m).

Hampstead is on a steep hill and the station platforms are the deepest
on the London Underground network, at 58.5 metres (192 ft) below ground
level. It has the deepest lift shaft on the Underground at 55 metres
(180 ft) which houses high-speed lifts.
Source https://en.wikipedia.org/wiki/Hampstead_tube_station

BTW - I used to live in Highgate and frequently travelled Hampstead
Lane/Heath Street to my office . Hampstead station is not at the top of
the Hill (I might be wrong but it's the Pond by the Heath that's
probably the apex) so the line is further under ground there than at the
station.

Isn’t the deepest bit near the site of the unfinished North End Station now
better known by the unofficial name Bull and Bush?

GH

On 16 Nov 2019 01:05:17 GMT, Marland
wrote:

Bryan Morris wrote:
In message , Bryan Morris
writes
In message , Roland Perry
writes
In message , at 20:41:41 on Fri, 15 Nov
2019, remarked:
On Fri, 15 Nov 2019 15:17:03 +0000
Roland Perry wrote:
In message , at 14:24:18 on Fri, 15 Nov
2019, Bryan Morris remarked:

I find the Picc unbearably deep, so by the time I've reached Barons
Court (westbound) I'm standing by the door gasping for fresh air. No
other tunnel affects me like that, not even the Chunnel.

I thought the Northern Line Edgware Branch was deepest. I know when I
used to travel via Hampstead/Golders Green my ears used to pop.

That's the deepest under the surface, but the surface is a hill! Air
pressure on the surface there will be lower as a result, by about 2.5%

I think the deepest below sea level (from memory) is the Jubilee between
Westminster and Waterloo.

Later: Hampstead Station is approx 200m above sea level at the surface,
140m above sea level at the platform.

Not it isn't. The highest point of the heath which is well above the tube
station is 134m. I'm guessing the station entrance is around 80-90m.

That's what one gets for looking things up at what turns out to be an
unreliable source. I still believe that the platforms are 60m below
the surface, which a more reliable source puts at 376ft (ie 115m).

Hampstead is on a steep hill and the station platforms are the deepest
on the London Underground network, at 58.5 metres (192 ft) below ground
level. It has the deepest lift shaft on the Underground at 55 metres
(180 ft) which houses high-speed lifts.
Source https://en.wikipedia.org/wiki/Hampstead_tube_station

BTW - I used to live in Highgate and frequently travelled Hampstead
Lane/Heath Street to my office . Hampstead station is not at the top of
the Hill (I might be wrong but it's the Pond by the Heath that's
probably the apex) so the line is further under ground there than at the
station.

Isn’t the deepest bit near the site of the unfinished North End Station now
better known by the unofficial name Bull and Bush?

Apparently, the deepest below sea level are the Jubilee Line platforms
at Waterloo station, 26m down. See this display I photographed at an
exhibition at the LMA:
https://www.flickr.com/photos/recliner/49074038572/in/dateposted-friend/lightbox/

It's a small, but surprisingly interesting exhibition, which runs for
just under another three weeks, well worth a visit if you're in the
area:
https://www.cityoflondon.gov.uk/things-to-do/london-metropolitan-archives/news-events/Pages/under-ground-london.aspx

In message , at 14:48:05 on
Sat, 16 Nov 2019, Recliner remarked:

Isn’t the deepest bit near the site of the unfinished North End Station now
better known by the unofficial name Bull and Bush?

Apparently, the deepest below sea level are the Jubilee Line platforms
at Waterloo station, 26m down.

There's an echo in here.
--
Roland Perry

On Sat, 16 Nov 2019 14:48:05 +0000
Recliner wrote:
https://www.flickr.com/photos/reclin...-friend/lightb
ox/

I wonder why the water tunnels are so deep. You'd think when pumping water
around you'd want them to be as shallow as possible since water is heavy stuff
and requires huge amounts of energy to pump back uphill.

On 17/11/2019 09:04, wrote:
On Sat, 16 Nov 2019 14:48:05 +0000
Recliner wrote:
https://www.flickr.com/photos/reclin...-friend/lightb
ox/

I wonder why the water tunnels are so deep. You'd think when pumping water
around you'd want them to be as shallow as possible since water is heavy stuff
and requires huge amounts of energy to pump back uphill.


The problem with that diagram is that it shows depth below ground level,
not sea level (or river level in this case), so it gives a distorted
view of the actual depths.

One possible reason for a deep water tunnel is to give it a straight run
so you don't have to keep pumping water uphill at intermediate points on
the route.

--
Graeme Wall
This account not read.

In message , at 23:04:32 on Fri, 15 Nov
2019, Bryan Morris remarked:
In message , Bryan Morris
writes
In message , Roland Perry
writes
In message , at 20:41:41 on Fri, 15 Nov
2019, remarked:
On Fri, 15 Nov 2019 15:17:03 +0000
Roland Perry wrote:
In message , at 14:24:18 on Fri, 15 Nov
2019, Bryan Morris remarked:

I find the Picc unbearably deep, so by the time I've reached Barons
Court (westbound) I'm standing by the door gasping for fresh air. No
other tunnel affects me like that, not even the Chunnel.

I thought the Northern Line Edgware Branch was deepest. I know when I
used to travel via Hampstead/Golders Green my ears used to pop.

That's the deepest under the surface, but the surface is a hill! Air
pressure on the surface there will be lower as a result, by about 2.5%

I think the deepest below sea level (from memory) is the Jubilee between
Westminster and Waterloo.

Later: Hampstead Station is approx 200m above sea level at the surface,
140m above sea level at the platform.

Not it isn't. The highest point of the heath which is well above the tube
station is 134m. I'm guessing the station entrance is around 80-90m.

That's what one gets for looking things up at what turns out to be an
unreliable source. I still believe that the platforms are 60m below
the surface, which a more reliable source puts at 376ft (ie 115m).

Hampstead is on a steep hill and the station platforms are the deepest
on the London Underground network, at 58.5 metres (192 ft) below
ground level. It has the deepest lift shaft on the Underground at 55
metres (180 ft) which houses high-speed lifts.
Source https://en.wikipedia.org/wiki/Hampstead_tube_station

BTW - I used to live in Highgate and frequently travelled Hampstead
Lane/Heath Street to my office . Hampstead station is not at the top of
the Hill (I might be wrong but it's the Pond by the Heath that's
probably the apex) so the line is further under ground there than at
the station.

The highest point the line passes under is 446ft (136m) the other side
of the road from the aptly named Heath Brow car park; the old Bull and
Bush pub is 391ft (119m).

Note that Google maps is particularly bad at showing the route with it's
"fit a curve to the stations" algorithm ignoring a bend just north of
Hampstead station with the actual line following Heath Road.
--
Roland Perry

In message , at 22:48:37 on Fri, 15 Nov
2019, Bryan Morris remarked:
In message , Roland Perry
writes
In message , at 20:41:41 on Fri, 15 Nov
2019, remarked:
On Fri, 15 Nov 2019 15:17:03 +0000
Roland Perry wrote:
In message , at 14:24:18 on Fri, 15 Nov
2019, Bryan Morris remarked:

I find the Picc unbearably deep, so by the time I've reached Barons
Court (westbound) I'm standing by the door gasping for fresh air. No
other tunnel affects me like that, not even the Chunnel.

I thought the Northern Line Edgware Branch was deepest. I know when I
used to travel via Hampstead/Golders Green my ears used to pop.

That's the deepest under the surface, but the surface is a hill! Air
pressure on the surface there will be lower as a result, by about 2.5%

I think the deepest below sea level (from memory) is the Jubilee between
Westminster and Waterloo.

Later: Hampstead Station is approx 200m above sea level at the surface,
140m above sea level at the platform.

Not it isn't. The highest point of the heath which is well above the tube
station is 134m. I'm guessing the station entrance is around 80-90m.

That's what one gets for looking things up at what turns out to be an
unreliable source. I still believe that the platforms are 60m below
the surface, which a more reliable source puts at 376ft (ie 115m).

Hampstead is on a steep hill and the station platforms are the deepest
on the London Underground network, at 58.5 metres (192 ft) below ground
level. It has the deepest lift shaft on the Underground at 55 metres
(180 ft) which houses high-speed lifts.
Source https://en.wikipedia.org/wiki/Hampstead_tube_station

Indeed, but if the earlier poster was having difficulty breathing due to
depth, it could be attributed to air pressure, which is a factor of
sea-level, not depth from the surface. However as the effect is less
than 1% at such depths, perhaps it's claustrophobia or air pollution
that's really the issue. In which case the tube lines are more prone to
those than the DLR.
--
Roland Perry