Powderhall Footbridge, opened in 2009, was designed in accordance with the standards and engineering knowledge applicable at the time. However, its 120-year design life was not a guarantee that the bridge would last for 120 years.
These startling assertions appear in a Briefing Note (14.10.26) just issued by the Council’s City & Neighbourhood Services and Transport & Mobility Directorate. We attach it in full below.
‘A warranty period is separate from the design life,’ says the Briefing, ‘and there was no warranty provided at the time of construction – such a warranty would be unusual for this type of construction.’
Inspections of the structure have been carried out by ‘appropriately qualified and competent’ personnel in accordance with the Design Manual for Roads and Bridges, overseen by Transport Scotland. Additional visual inspections have been conducted yearly using Parks Quality Assessment and Green Flag Award criteria to check for potential safety risks.
Cracks
Cracks in the top chord of Powderhall Footbridge were first noted in 2017 and were regularly monitored thereafter. Between 2017 and October 2025, the biggest crack widened from 6mm to 15mm.
In June 2026, consulting engineers Mott MacDonald were brought in to advise on strengthening the bridge. Their report identified ‘significant splitting’ at several key joints of the top chord which are critical to overall stability.
A structural failure triggered by ‘a heavy crowd or extreme weather’, or the failure of a single joint, could result in collapse without warning. Hence, the bridge was closed at short notice, following Health & Safety Executive guidance.
Why it failed
The Briefing Note identifies a potential cause for the bridge’s failure: ‘Forces from the diagonal members are transferred into the top chord in a direction (perpendicular to the grain) where the timber is more vulnerable to splitting.’ Water entered the resulting crack and made the timber swell and deteriorate.
At least 13 timber footbridges similar to Powderhall have failed or been closed in the UK since 2020, and another in Ireland.
Notwithstanding this, ‘The method of construction was designed in accordance with the standards and engineering knowledge applicable at the time.’
What next?
Engineers say repair of the structure is not an option, given the unpredictability of how stresses would be transferred during the process.
A temporary footbridge here would be expensive, time-consuming and obstructive to the construction of a permanent alternative.
Any new bridge would likely be built on the existing piers. The combined cost of demolition, supply, installation and utility diversions and contingency (City Fibre and Scottish Power) is estimated at £2.2m. If funding coulf be found in April 2027, a new bridge would not be ready until 2028 at the earliest.
Points to ponder
- We know that Westfield Avenue and Carrick Knowe Avenue Footbridges have been prioritised for further review, monitoring and inspections. Who is responsible for inspection and upkeep of the (we think privately owned) timber footbridge connecting St Mark’s Park and Hughes Close?
- Powderhall Footbridge was manufactured by the now dissolved Dodson Macrae (Hardwood Structures) Ltd, from which no compensation can be expected. Even so, why was no warranty secured during the Council’s procurement process? It might have been ‘unusual for this type of construction process’ but it would obviously have been prudent. Will a warranty be secured for any replacement bridge here?
- Why does Edinburgh Council have no insurance in place for the bridge? Is this normal practice for local authorities? Is it simply unaffordable?
- Are current design and construction methods for timber bridges any more reliable than those of 2009? Would we be better resorting to the former Meccano-style Bailey Bridge which served this crossing before?
- Why in its estimation of costs to replace the bridge has Edinburgh Council factored in payments to affected utility companies? What is the nature and extent of any contractual obligation to Scottish Power and City Fibre?
- If the Romans could do it, why can’t we?
Got a view? Tell us at spurtle@hotmail.co.uk
For previous Spurtle coverage of the Powderhall Footbridge debacle, see:
‘Powderhall Bridge Closed’ (25 June 2026).
‘Bridge Closed for Foreseeable Future’, Issue 364 (1 August 2026).
‘No New Powderhall Footbridge until 2028’ (28 August 2026).
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