TfL Ref: FOI-2576-1920

Thank you for your email received by Transport for London (TfL) on 21 November 2019.

Your request has been considered in accordance with the requirements of the Freedom of Information Act] and our information access policy. I can confirm we do hold the information you require. You asked:

1. How many road bridges are you responsible for maintaining?
2. For the last financial year (2018/19) how many Principal Inspections have taken place
3. For the last financial year (2018/19) how many General Inspections have taken place?
4. For the last financial year (2018/19) how many Structural Reviews and/or BD21 assessments have been conducted?
5. How many sub-standard (in terms of capacity) and/or weight restricted bridges do you have?
6. Of these, how many do you intend to return to full load carrying capacity in the next 5 years?
7. How many bridges would you return to full load carrying capacity if you had no resource restrictions?
8. (i) How many of your bridges require post tensioned special inspections (PTSIs)?
(ii) How many of those have had PTSIs within the last 18 years?
(iii) Of those that have not had a PTSI, how many require/are due one?
(iv) How much funding would you anticipate is required to remove the backlog of PTSIs for those bridges identified in Q8(iii)?
9. In monetary terms, what is the current Depreciation (i.e. difference between your GRC and DRC as declared for your WGA return for 2018/19)?
10. Have you calculated your back log (or workbank) for bridges? What is the calculated value of your backlog of road bridges, or your best estimate if a calculated value is not available?
11. (i) What is the annual revenue works budget for maintaining your bridge stock?
(ii) What is the annual capital works budget for maintaining your bridge stock?
(iii) What total budget would you estimate is required to maintain the bridge stock at its current level (standstill budget)?
12. (i) How many BD97 Stage 1 Scour Assessments did you undertake in 2018/19?
(ii) How many BD97 Stage 2 Scour Assessments did you undertake in 2018/19?
QUESTION  2018/19 Comments
1)  337 
2)  147 full breakdown is included in the attached spreadsheet
3)  436 full breakdown is included in the attached spreadsheet
4)  5 
5)  53 Excluding substandard culverts (3), subways (3) & footbridges (2)
6)  14 
7)  With no resource constraint, all highway structures on the TfL network would be strengthened to carry all traffic and Abnormal Loads 
8) (i)  92 
8) (ii)  81 
8) (iii) 11 
8) (iv) £2.9M 
9)  £2,241,190 
10)  £700-900M It is normal to have a capital backlog. Investment has increased in 19/20 to address backlog.
11) (i) Please see the answer in the below table. 
11) (ii) £1M Safety critical works strategy in place for the given FY
11) (iii) £60-70M 
12) (i) TfL has not carried out any scour assessments during 2018-2019 as in previous years the risk of scour was deemed to be too low. However, if flooding occurred then we would then carry out scour inspections. 
12) (ii) As above.  

Please find below response to Q11. Please note we hold data for all structures, not specifically for bridges. Costs for the 18/19 financial year are as follows:

Activity Cost
Bridges and other Structures Lump Sum Maintenance 1,545,556.80
Structures General Inspections 968,694.83
Structures Principal Inspections 1,105,294.90
Structures Ordered Maintenance 956,065.29
Structures Interim Measures (Monitoring) 726,178.87
 
Total :  5,301,790.69

If this is not the information you are looking for, or if you are unable to access it for some reason, please do not hesitate to contact me.

Please see the attached information sheet for details of your right to appeal.

Yours sincerely
Eva Hextall
FOI Case Officer
FOI Case Management Team
General Counsel
Transport for London

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