MML Electrification: progress updates

[swt_passenger]

So to clarify:

Route Section 1 (RS1) - Kettering-MH-Wigston South

Route Section 2 (RS2) – Wigston South to Syston 19.5km

Route Section 3 (RS3) – Syston to Trent Junction 28.7km

(Bolding mine but am I overthinking this? There seems to be a bit missing here)

Route Section 4 (RS4) – Sheet Stores Junction to Chaddesden Sidings (Derby) 15.7km

Route Section 5 (RS5) – Trent Junction to Nottingham 13.1km

Route Section 6 (RS6) – Chaddesden Sidings (Derby) to Toadmoor Tunnel 16.7km

Route Section 7 (RS7) – Toadmoor Tunnel to London Road 43.3km

Route Section 8 (RS8) – London Road to Sheffield North 2.5km

The distance given for section 3 seems to provide a few km extra compared to Syston to Trent South on its own. Maybe even enough for 2 sides of the triangle…

 

[GRALISTAIR]

Correct - two sides of the Trent triangle (only the East Midlands Parkway - Nottingham side is mentioned above)

I have attached a crude drawing with orange highlight - have I got the two sides of the triangle correct?

 

[59CosG95]

So to clarify:

Route Section 1 (RS1) - Kettering-MH-Wigston South - 35 + 43 = 78 STK

Route Section 2 (RS2) – Wigston South to Syston 19.5km - 41 STK

Route Section 3 (RS3) – Syston to Trent Junction 28.7km - 110 STK

(Bolding mine but am I overthinking this? There seems to be a bit missing here)

Route Section 4 (RS4) – Sheet Stores Junction to Chaddesden Sidings (Derby) 15.7km - 37 STK

Route Section 5 (RS5) – Trent Junction to Nottingham 13.1km - 38 STK

Route Section 6 (RS6) – Chaddesden Sidings (Derby) to Toadmoor Tunnel 16.7km - 43 STK

Route Section 7 (RS7) – Toadmoor Tunnel to London Road 43.3km - 85 STK (to Dore Station Jn)

Route Section 8 (RS8) – London Road to Sheffield North 2.5km - 18 STK (from Dore Station Jn)

I saw a LinkedIn post from SPL's PM for MMLe giving the wiring in STK (single track km); these are in red above.

 

[GRALISTAIR]

There exist plans for a large-scale remodelling of the Trent Jns/Sheet Stores area and so a section has been omitted whilst further work is carried out.

Do you mean this which I think came from Modern Railways a few moths ago?

 

[zwk500]

Do you mean this which I think came from Modern Railways a few moths ago?

I've seen different suggestions to that, and recent changes to HS2 have probably not helped, but something along that line yes. There will be a desire to increase the line speed through Trent East Junction for London-Nottingham traffic and through Sheet Stores Junction for London-Derby Traffic.

 

[grumpyoldman01]

I've seen different suggestions to that, and recent changes to HS2 have probably not helped, but something along that line yes. There will be a desire to increase the line speed through Trent East Junction for London-Nottingham traffic and through Sheet Stores Junction for London-Derby Traffic.

That plan was originally in Network Rail's Route Utilisation Study, and it was claimed that it would be needed by 2043 even with HS2 as originally proposed; I think it was more to do with capacity than speed - from memory, isn't there a bit as low as 10mph for trains passing over the up at Sheet Stores, and wasn't this necessary to maximise the speed for trains going between Long Eaton and East Midlands Parkway?

== Doublepost prevention - post automatically merged: 24 May 2022 ==

I have attached a crude drawing with orange highlight - have I got the two sides of the triangle correct?

Looking again, I guess it depends what's meant by Trent Junction; certainly, there's no mention at all of Trent South and Trent East to Sheet Stores, so they're definitely not listed, and if Trent Junction to Nottingham means from the East one, then no side of the triangle is listed as to be wired

 

[Bald Rick]

Anyone know if Jubilee weekend is being used to do any electrification work or is it a total celebration and everyone is off?

very little disruptive engineering work of any type over the weekend.

Re Trent Junctions, all three sides will be wired.

 

[Peregrine 4903]

very little disruptive engineering work of any type over the weekend.

Re Trent Junctions, all three sides will be wired.

Hayes branch got the raw end of the deal!

 

[Class 170101]

Re Trent Junctions, all three sides will be wired.

Presumably the overlap distances would be such that it would be wired by default?

 

[edwin_m]

That plan was originally in Network Rail's Route Utilisation Study, and it was claimed that it would be needed by 2043 even with HS2 as originally proposed; I think it was more to do with capacity than speed - from memory, isn't there a bit as low as 10mph for trains passing over the up at Sheet Stores, and wasn't this necessary to maximise the speed for trains going between Long Eaton and East Midlands Parkway?

That plan was originally in Network Rail's Route Utilisation Study, and it was claimed that it would be needed by 2043 even with HS2 as originally proposed; I think it was more to do with capacity than speed - from memory, isn't there a bit as low as 10mph for trains passing over the up at Sheet Stores, and wasn't this necessary to maximise the speed for trains going between Long Eaton and East Midlands Parkway?

Looking again, I guess it depends what's meant by Trent Junction; certainly, there's no mention at all of Trent South and Trent East to Sheet Stores, so they're definitely not listed, and if Trent Junction to Nottingham means from the East one, then no side of the triangle is listed as to be wired

I've seen different suggestions to that, and recent changes to HS2 have probably not helped, but something along that line yes. There will be a desire to increase the line speed through Trent East Junction for London-Nottingham traffic and through Sheet Stores Junction for London-Derby Traffic.

Yes, anything going from Nottingham towards Derby has to negotiate a fixed diamond on a negative cant with a 10mph restriction. I don't see the speed of trains between Long Eaton and East Midlands Parkway as the issue here, as it's also constrained by Trent South and by most or all trains probably stopping at Parkway in future anyway. The main benefit of increasing that 10mph would be to reduce the time during which any train taking that route blocks the main line in both directions. However, it's hard to see how it would be possible without drastic changes to the railway alignments in the area, even if the curve towards Castle Donington was expensively replaced. Housing prevents any significant change to the line towards Long Eaton station, and now extends right up to the railway boundary on the north side of the curve.

Trent South and East, Sheet Stores and sometimes the other junctions nearby are collectively and informally known as the "Trent Junctions" or similar terminology.

 

[Mollman]

Yes, anything going from Nottingham towards Derby has to negotiate a fixed diamond on a negative cant with a 10mph restriction. I don't see the speed of trains between Long Eaton and East Midlands Parkway as the issue here, as it's also constrained by Trent South and by most or all trains probably stopping at Parkway in future anyway. The main benefit of increasing that 10mph would be to reduce the time during which any train taking that route blocks the main line in both directions. However, it's hard to see how it would be possible without drastic changes to the railway alignments in the area, even if the curve towards Castle Donington was expensively replaced. Housing prevents any significant change to the line towards Long Eaton station, and now extends right up to the railway boundary on the north side of the curve.

Trent South and East, Sheet Stores and sometimes the other junctions nearby are collectively and informally known as the "Trent Junctions" or similar terminology.

Unless removing the western Sheet Stores Jnc allows the line from Trent South to be moved slightly South / West with the eastern Sheet Stores Jnc then remodeled with longer cross overs

 

[59CosG95]

Yes, anything going from Nottingham towards Derby has to negotiate a fixed diamond on a negative cant with a 10mph restriction. I don't see the speed of trains between Long Eaton and East Midlands Parkway as the issue here, as it's also constrained by Trent South and by most or all trains probably stopping at Parkway in future anyway. The main benefit of increasing that 10mph would be to reduce the time during which any train taking that route blocks the main line in both directions. However, it's hard to see how it would be possible without drastic changes to the railway alignments in the area, even if the curve towards Castle Donington was expensively replaced. Housing prevents any significant change to the line towards Long Eaton station, and now extends right up to the railway boundary on the north side of the curve.

Trent South and East, Sheet Stores and sometimes the other junctions nearby are collectively and informally known as the "Trent Junctions" or similar terminology.

Looking at Google Maps, the civils interventions required to produce that map like-for-like would be complex and eyewateringly expensive. Mind you, with Ratcliffe PS due to close, a small slice of the land there could be used to build a flying junction (presumably from the Slows) to get west over the MML, the Soar, and probably Lockington Marshes too (which might make it a bit tricker to do).

 

[Flying Phil]

I had a look around Kettering to Desborough today. There are a few more cantilevers up around Rushton and the worksite still has about 40 masts/piles and cantilevers ready to be installed. It does seem to be winding down though. There are still no piles/masts to be seen through Desborough yet.

 

[Western Sunset]

"...Route Section 4 (RS4) – Sheet Stores Junction to Chaddesden Sidings (Derby) 15.7km

Route Section 6 (RS6) – Chaddesden Sidings (Derby) to Toadmoor Tunnel 16.7km..."

Wonder why they're going on about the route through Chadd Sdgs? The section between Spondon Jn and Derby North Jn closed as a through route in 1969. Much has been built on. Has someone been using an old database somewhere?

 

[grumpyoldman01]

Looking at Google Maps, the civils interventions required to produce that map like-for-like would be complex and eyewateringly expensive. Mind you, with Ratcliffe PS due to close, a small slice of the land there could be used to build a flying junction (presumably from the Slows) to get west over the MML, the Soar, and probably Lockington Marshes too (which might make it a bit tricker to do).

Network Rail gave an indicative cost of between £175m and £375m; the price level isn't quoted, but the East Midlands Route Study was published in March 2016

The Route Study describes the new line as splitting as it approaches EMD (from Stenson) "to create a single connection-point via a grade separated junction (to the north) and a single connection point at grade to the south"

The area has changed a lot since March 2016; East Midlands Gateway has been built, the A453 has been made into a dual carriageway and is now named Remembrance Way, and there have been major roadworks altering the connection between the A50 and the M1 - I'm pretty sure the southbound connection at Junction 24A didn't exist back then.

For those not familiar with the area, the Sheet Stores - Trent East curve is "new". When the Midland Counties built the triangular junction which connected the Derby - Leicester - Nottingham lines together, the north side followed the alignment of what is now Fields Farm Road; and when the Midland built the line up the Erewash Valley, that also had a triangular junction at its south end and as it started south of the point where the lines from Derby/Leicester joined to head towards Nottingham, it crossed the one from Derby on a flat crossing. Then Trent station was built, together with the present curve from Trent East to Sheet Stores (which takes its name from it being the location of the MR's works for making wagon sheets - a lot of it still stands north of the MML and east of the bridge over the Erewash Canal); finally, the original north side of the triangle was cut back and a sharp curve built to connect it to the north end of Trent station - this meant that some trains from Trent to Derby left at the south end and went via the present curve to Sheet Stores, others at the north end, round the sharp curve and then over the original alignment to a junction just east of Long Eaton station (which was called Sawley Junction until the original Long Eaton station on the Erewash Valley line closed in the late 1960s).

The area north of the Trent East - Sheet Stores curve and south of the original alignment is now built on, and east of the Trent South - Trent East (and on towards Nottingham) has been heavily quarried for sand and gravel; a lot of these have been flooded, and some form the Attenborough nature reserve. There's also a flooded quarry south of the Derby line just after passing under the M1 at Long Eaton.

Therefore, the scope for doing "something" to ease curves, etc, is very restricted, and I guess that ground conditions - a lot of sand and gravel - will present challenges for electrification teams when "planting" structures between the Red Hill Tunnels (just north of EMD), at least Beeston towards Nottingham, and Draycott towards Derby

== Doublepost prevention - post automatically merged: 25 May 2022 ==

"...Route Section 4 (RS4) – Sheet Stores Junction to Chaddesden Sidings (Derby) 15.7km

Route Section 6 (RS6) – Chaddesden Sidings (Derby) to Toadmoor Tunnel 16.7km..."

Wonder why they're going on about the route through Chadd Sdgs? The section between Spondon Jn and Derby North Jn closed as a through route in 1969. Much has been built on. Has someone been using an old database somewhere?

Seeing Chadd Sdgs in RS4 didn't surprise me as it is used to get trains between Etches Park and Derby station, but it did in RS6 - I would have thought that the latter should have been from the junction with the Chadd curve to Toadmoor Tunnel

 

[zwk500]

Seeing Chadd Sdgs in RS4 didn't surprise me as it is used to get trains between Etches Park and Derby station, but it did in RS6 - I would have thought that the latter should have been from the junction with the Chadd curve to Toadmoor Tunnel

Given the appearance of Trent Junctions and slightly ambiguous use of Syston, I'm not surprised the section limits have been listed somewhat vaguely.

 

[Nottingham59]

the scope for doing "something" to ease curves, etc, is very restricted

There's a whole thread on the options for tracks layouts around the Trent triangle after the HS2 stump is built. It would be crazy to install OHLE in this area before the detailed design work for the HS2 connection.

See here: https://www.railforums.co.uk/thread...-and-capacity-through-trent-junctions.225009/

The IRP talked about the need to grade-separate HS2 to NOT flows from the NOT to DBY traffic, but i don't see that there's enough space around the triangle to do this, without severing the low-level route to Toton.

 

[38Cto15E]

Will the 4th line between Wigston and Syston be re-instated before the wires go up?

 

[Nottingham59]

Will the 4th line between Wigston and Syston be re-instated before the wires go up?

The word on the street is that the wiring will go ahead as a standalone scheme. See this post:

My copy of the May issue of Modern Railways has arrived. There's an MML item on page 12
.....

The next section being developed, known as Section 2, is Wigston South Junction to Syston Junction, so in other words the Leicester area, which is apparently now being taken forward as a standalone electrification scheme, neither integrated with nor waiting for a capacity improvement scheme. "Work is ongoing to obtain approval to go into design for Section 2."

 

[Flying Phil]

This is the view just to the South of Rushton Village, showing the new cantilevers on a couple of masts.

 

[Western Sunset]

Will the 4th line between Wigston and Syston be re-instated before the wires go up?

The word on the street is that the wiring will go ahead as a standalone scheme. See this post:

My copy of the May issue of Modern Railways has arrived. There's an MML item on page 12
.....

The next section being developed, known as Section 2, is Wigston South Junction to Syston Junction, so in other words the Leicester area, which is apparently now being taken forward as a standalone electrification scheme, neither integrated with nor waiting for a capacity improvement scheme. "Work is ongoing to obtain approval to go into design for Section 2."

This seems to be the complete opposite approach by NR to the (non) electrification of Oxford. There, electrification was curtailed awaiting the rebuilding of Oxford station. Now it appears to be to push on regardless.

 

[JamesT]

This seems to be the complete opposite approach by NR to the (non) electrification of Oxford. There, electrification was curtailed awaiting the rebuilding of Oxford station. Now it appears to be to push on regardless.

It wasn't rebuilding the station that was blocking, but resignalling the area and some remodelling of the track. That has now been done so electrification can proceed.

 

[Mordac]

Has work started on uprating St Pancras to Bedford wires for 125mph?

 

[station_road]

"...Route Section 4 (RS4) – Sheet Stores Junction to Chaddesden Sidings (Derby) 15.7km

Route Section 6 (RS6) – Chaddesden Sidings (Derby) to Toadmoor Tunnel 16.7km..."

Wonder why they're going on about the route through Chadd Sdgs? The section between Spondon Jn and Derby North Jn closed as a through route in 1969. Much has been built on. Has someone been using an old database somewhere?

Since the remodelling a few years ago trains coming out of Etches Park to head south now have to go into what is left of Chaddesden Sidings before reversing back through Derby station towards Spondon or Peartree. So that would need to be electified to allow electric trains in and out of the the depot. I would guess RS4 includes that, Derby station and Etches Park itself. RS6 is then from that point north

 

[adamedwards]

Has work started on uprating St Pancras to Bedford wires for 125mph?

Yes, e.g. the Napsbury additional feeder to get more power in the wires. See several posts above on this.

 

[59CosG95]

Yes, e.g. the Napsbury additional feeder to get more power in the wires. See several posts above on this.

The electrical work to improve the infrastructure certainly is. I'm not entirely sure if any mechanical work to re-grade the Fast lines' OLE has begun yet though - while a few new structures have been sporadically installed along the route, all of these are replacements for failing structures IIRC.

 

[Ken H]

The electrical work to improve the infrastructure certainly is. I'm not entirely sure if any mechanical work to re-grade the Fast lines' OLE has begun yet though - while a few new structures have been sporadically installed along the route, all of these are replacements for failing structures IIRC.

What needs to be done (Between St P and Bedford)? More tension in the contact wire? or something more radical?

 

[hwl]

The electrical work to improve the infrastructure certainly is. I'm not entirely sure if any mechanical work to re-grade the Fast lines' OLE has begun yet though - while a few new structures have been sporadically installed along the route, all of these are replacements for failing structures IIRC.

Presumably focussing on several high time keeping impact section first?

 

[59CosG95]

This is the view just to the South of Rushton Village, showing the new cantilevers on a couple of masts.
View attachment 115255

Saw those yesterday myself - based on the presence of anchor masts with Tensorex sandwiching them, those two will be for an overlap.
There's still 2 TTC masts missing between Station Rd (U/B 45) and Bridle Rd (O/B 44), and 3 structures missing between O/B 44 & F/B 43; one of which is an MPA portal.

 

[Edvid]

Yes, e.g. the Napsbury additional feeder to get more power in the wires. See several posts above on this.

Again, Napsbury will only be a sectioning site for OLE isolation purposes (like most of the MML locations where switchgear is visible). In normal operation the Midland Main Line is only fed at Borehamwood and Chalton (Grahame Park still has its 132kV DNO connection as a backup, I assume).

My understanding is that KO1a modification works on the original "BedPan"* stretch are split into three distinct groups - resectioning (which includes a northward shift of the neutral section between the Borehamwood / Chalton feeds), conversion of feeding system (replacing return conductors / booster transformers with return screening conductors / aerial earth wires means reduced power transmission losses) and mechanical OLE mods (regrading of fast line OLE and registration arm adjustments). It's the third group that'll remove the 100mph limit on electric rolling stock south of Bedford.

[* Whoever came up with that way back when must have had quite the dry sense of humour]