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Assumptive costs
Assumptive costs
Expanding railway by 2 rails (land): £8699/m
Expanding railway bridge for 2 rails: £35,000/m
Tunnelling for 2 rail track: £53485/m
New station (low level underground, capable of Crossrail sized trains): £200-400 million
Expanding stations to 250m platforms: £15-20 million/platform
All costs mentioned are estimations provided/derived from the sources listed below.
They do not include cost of reimbursing private real-estate, planning permission costs and other utilty costs.
Sources
Sources
Architects Journal: (Expanding railway, railway bridges)
Rail Future cost analysis: (Expanding railway bridges)
GCR railways: (Expanding railway, railway bridges)
TFL transparency forum: (Tunnelling in London, New station underground)
Government (Borough of Hounslow and Fulham): (Overground station/platform expansion costs)
Starting from Paddington, where the line will branch off, moving southwards.
Key: (highlighting)
None = no change
Purple = expansion by 2 tracks (land)
Pink = expansion by 2 tracks (bridge)
Orange = New tunnel
Green = new station
Blue = extend platform
Maps may be in roadmap or satellite form, depending on which is most applicable too type of track (underground, overground)
Branch from current Elizabeth line tunnel
1,190m of 2 rail tunnel
Cost for tunnelling: £63,647,150
Cost for rail: £10,351,810
Total estimated cost for section: £73,998,960
Bayswater - Earlscourt
Best case: No extra tracks needed, circle and district line timetables adapted to fit ESE services
Total estimated cost for section: £0
Worst case: Expand tracks by 1 (underground) for 2,880m
Estimated cost (derived from other costs): 12300/m (added as "other" costs)
Total estimated cost for section: £35,424,000
Earlscourt - West Brompton (new interchange)
718m of 2 rail tunnel
+1 new station
Cost for tunneling: £38,402,230
Cost for new station: £200-400 million
Estimation based on similar sized stations, while considering the smaller size of this station. Estimation of station cost is very hard to achieve, so may be inaccurate. See sources for more info.
Total estimated cost for section: £238,402,230 - £438,402,230
West brompton - East Putney
1,812m of expansion by 2 rails over land (dark purple)
1,683m of expansion by 2 rails over bridge (lighter purple)
+2 platforms expanded too 200m at East Putney
+2 platforms expanded too 200m at Fulham Broadway
Cost for land rail expansion: £15,762,588
Cost for bridge rail expansion: £58,905,000
Cost for 4 platform expansions: £60,000,000 - £80,000,000
Total estimated cost for section: £134,667,588 - £154,667,588
East putney- SWR mainline (Yellow)
3,190m of expansion by 2 rails over land
Cost for land rail expansion: £27,749,810
Total estimated cost for section: £27,749,810
SWR mainline onwards
Once on the SWR mainline (and later on Kingston loop) the number of tracks are sufficient for the extra surfaces, especially as the mainline between Wimbledon and the Kingston loop branch is less busy. Some areas of the kingston loop may need to be expanded to 3 tracks, in order to provide places for ESE to overtake SWR trains stopped at stations. A budget of £10,000,000 has been added for these expansions in total.
The stations should have platforms sufficient or almost sufficient for the new trains (hard to tell due to lack of public data), however new signaling and potentially extending platforms slightly brings a budget of £7,500,000 per station (averaging between stations that need more/less work), bringing the total for the Teddington branch up too £22,500,000, and for the Epsom line £45,000,000, for 4 stations, however the most efficient route for this line has not yet been calculated, so may be innacurate.
Other costs:
£20,000,000 has been assigned for other costs overlooked in the cost estimation, such as the few bridges between East Putney - Wimbledon, repairing current infrastructure etc...
Final estimations:
Cost break down:
Estimates:
Paddington - Wimbledon: £431,171,438 - £676,416,358
Teddington Branch: £32,500,000
Epsom Branch: £55,000,000
Total (Paddington - Teddington): £463,671,438 - £708,916,358
Total (Both branches): £518,671,438 - £802,318,588
The higher end of the total (Both branches) estimate is what is refered too in the rest of the project, however realistically this number may be higher, and for comparison to other project, may be better to think of as <£1 billion due too the inefficiency of money use seen in previous TFL projects.
Conclusions
Conclusions
The total for both branches is an estimated £802,318,588 based on the efficiency of other projects, but in reality it is likely to be slightly higher.
However, this is still the relatively cheaper option.
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