ELL Gradients at Dalston Junction

[Deleted]

Hello.

Anyone know what the exact gradient of the ramp down from Haggerston to Dalston Junction is?

It must be pretty steep given that it descends from above ground level to below ground level in the space of 1/2 kilometre.

Thanks

[norbitonflyer]

Aug 22, 2014 9:50:30 GMT @triplex said:

Anyone know what the exact gradient of the ramp down from Haggerston to Dalston Junction is?It must be pretty steep given that it descends from above ground level to below ground level in the space of 1/2 kilometre

I googled it and a figure of 1:42 came up although the link failed so I can't verify that. Must have been hard work when the Broad Street line was steam operated. 1/42 over 500m (if that's an accurate distance) implies a height difference of about 12 metres, which is probably enough to get from a viaduct to a cutting. Note that the ground level rises as well.

The new section between Shoreditch and Whitechapel apparaently includes a gradient at 1:30.

[Deleted]

The 500m I measured off of Google Earth. It could be slightly more but the difference is probably negligible.

Thanks very much for that value!

[christopher125]

Don't forget the white gradient posts all along the reopened ELL which should confirm the gradients.

Chris

[longhedge]

I have copies of the 225 Studios DVDs which I believe were used for driver training. Not being blu-ray, it is difficult to decipher the gradient profile boards.

However, going from Dalston Junction to Haggeston, the boards show LEVEL/43, then 43/44 and 44/45, if my interpretation of the hard-to-read DVD is correct. I cannot read the final one when the line levels off at Haggeston. The gradient does vary over the distance, albeit very slightly.

Trust this is helpful.

[redbond]

My route map shows from Dalston to Haggerston as being LEVEL/43 then 43/44. It doesn't show a third one on my map though.

[longhedge]

redbond

I have just viewed the DVDs (not state of the art) on my Mac, which gives better resolution.
The first two are LEVEL/43, then 43/44 - all in agreement here. However, there is another post which I am now sure is 44/45 and the post just before Haggerston platforms says 45/300 (not too sure about the 300).
Not sure why your map says differently. What route map are you using?

As I reside at Clapham Junction, and tomorrow promises to be a washout, I will pay a visit tomorrow and check the Gradient Post in person and let you know. I can check out the platform extension works as well.

[redbond]

The route map I was given during my training. I'll have a look tomorrow when I'm on shift. I'm not disputing there is a third one, it just isn't shown on the map. I think whoever created it gave up doing the gradients as Highbury to the 43/44 board is there but nothing after until New Cross Gate.

[longhedge]

redbond


Thanks for response. I did have a question myself on gradients. (My Video is frustrating - the posts are just barely readable!!). I always felt that the gradient down from Shoreditch High Street was 1 in 29, but the post in my Video seems to say 1 in 30, but it is hard to be sure.

I will hopefully check this out tomorrow.

[melikepie]

Just out of curiosity, how steep also are Shoreditch to Whitechapel and Surrey Quays to Queen's Road, New Cross and New Cross Gate?

[longhedge]

melikepie

The only one I know for certain is Silwood Junction to Old Kent Road Junction (Surrey Quays to Queen`s Road) where the posts say a gradient of 1 in 30 decending North of Surrey Canal Road bridge.

[redbond]

The top of Haggerston is actually 44/500.

From Surrey Quays to Queens Road (Down Direction) is the following: (\= downhill gradient and /=uphill gradient)

174\/100
100//170
(Silwood Junction & tunnel)
170/\63
63\/67
/67-Level (by Silwood Sidings)
Level-/66
66//29
29/\500
(Surrey Canal Road Station Box)
500\\143
143\-Level
Level-/83
83//234
(Old Kent Road Junction)
234//375
375//312
312//220
220/200 (QRP Station)

[longhedge]

redbond

Many thanks for the detailed gradients. It raises an interesting question. I followed the rebuild and always felt the gradient down from Surrey Canal Road was 1 in 29, like you say, but the actual gradient post says 1 in 30 ( or did 3 months ago). Another mystery!!

[redbond]

Sorry, I only listed the gradients in the "down" direction. (uphill towards SCR). It is 1/29 there, however on the "up" (which is downhill) it is 1/30.

[longhedge]

redbond

Thanks for the information.

All those changes in grade must make driving the 378s `interesting`!!.

[Deleted]

Aug 26, 2014 7:42:24 GMT longhedge said:

All those changes in grade must make driving the 378s `interesting`!!.

It can keep you on your toes, especially with the drizzle type of rain we've had over the past two days. Interestingly you can get a fair bit of wheel slide coming into dry covered sections with wet wheels so even though the stations at the likes of Shoreditch and Shadwell are covered there are open sections just before and the rail conditions coupled with gradients can vary massively.