I am writing to request information under the Freedom of Information Act 2000 concerning the inspection of highway structures (bridges, culverts, and similar structures) maintained by your authority.
This request is made with reference to the inspection framework set out in CS450 and the Well-managed Highway Infrastructure: A Code of Practice (Road Liaison Group), which together establish a maximum six-year interval between Principal Inspections unless a longer interval has been formally approved through a risk-based assessment.

For every highway structure within your authority's inventory, please provide the following, ideally as a single spreadsheet with one row per structure:

1.
a) The structure name and unique identifier or reference number.
b) The asset type (for example, bridge, culvert, retaining wall, or footbridge) and the span or length, where held.
c) Confirmation of ownership and maintenance responsibility (i.e. whether the structure is maintained by your authority, a third party, or held under a Rights of Way designation), so that responsibility for each structure is unambiguous.
d) The date of the most recent General Inspection.
e) The date of the most recent Principal Inspection.
f) The scheduled date of the next Principal Inspection.
g) The inspection interval currently applied to the structure, in years, and whether this is the standard six-year interval under CS450 and the Well-managed Highway Infrastructure Code of Practice, or an extended interval.

2. For any structure where the Principal Inspection interval has been extended to ten years or more under a risk-based assessment, please provide, for that structure individually rather than as a general policy statement:
a) The date on which the extension was approved.
b) The role or team responsible for approving the extension (for example, Principal Engineer or the Bridges and Structures Team), without needing the name of the individual officer.
c) The methodology or criteria used to justify the extension under your risk-based assessment process.

3. The date on which your authority's current risk-based variable interval policy (if you operate one) came into force, and what governed Principal Inspection intervals for structures last inspected before that date.

4. Confirmation of whether this disclosure represents your authority's complete inventory of highway structures, or whether any structures, or any historical inspection records, are held separately (for example in a legacy asset management system not reflected in this return).

5. Confirmation of whether any dates in the disclosed data are system defaults, placeholders, or otherwise not genuine inspection dates, and if so, which records these affect.

Points 1 and 2 above are my priority. If answering points 3, 4, and 5 in addition would cause this request to exceed the appropriate cost limit under Section 12 of the Act, please disregard points 3, 4, and 5, provide points 1 and 2 in full, and confirm which of points 3, 4, and 5 you have omitted on cost grounds, so that I may consider requesting them separately. If point 2 itself, together with point 1, would already exceed the cost limit, please advise how point 2 may be narrowed, for example by raising the ten-year threshold, to bring it within the limit while still providing point 1 in full.

Please cover all structures currently on your inspection register, regardless of inspection history. If possible, please provide this information in electronic format as a spreadsheet (for example XLSX or CSV), with one structure per row, columns in the order requested above, and dates in DD/MM/YYYY format.