Bridge of Allan flood scheme opens public sessions as diggers move in

Stirling Council is holding public sessions this month as work begins on Bridge of Allan’s £16m flood scheme. Here’s what the closures are for, and how long residents can expect them to last.

Flood defences are easiest to ignore right up until the water comes back. In Bridge of Allan, the next visible sign is less dramatic than a swollen river but more disruptive in the short term: a main road closed for over a year, and a council trying to explain why before residents start asking on their own.

In brief:

• Stirling Council is holding two public engagement events in August as construction begins on the Bridge of Allan Flood Protection Scheme
• An online session runs Monday 17 August (6.30–7.30pm); an in-person drop-in follows at Bridge of Allan Library on Tuesday 18 August (2.30–4.30pm)
• Cornton Road closes southbound from 10 August 2026 to early 2027; Allanvale Road closes fully from 24 August 2026 to 27 January 2027

Why the Bridge of Allan flood scheme means over a year of road closures

This is the point where a flood project changes character. On paper, it was modelling, approvals and programme lines. On the ground, it’s now compounds, access arrangements, construction sequencing, and one road closed southbound for 14 months, which is the detail residents are reacting to most directly.

The scale of what’s being built explains why the closures run this long. The scheme will protect 87 properties and roughly 700 metres of road from flooding by the Allan Water, upgrading existing flood defence walls along Allanvale Road, Cornton Road and Fountain Road, and adding new flood defence bunds at Inverallan Road and the adjacent factory site. It’s designed to protect against a flood event with an estimated one-in-50-year return period, replacing defences built in the 1980s that the council says are reaching the end of their service life and no longer provide sufficient protection against more frequent, more intense flooding. Balfour Beatty Civil Engineering has been awarded the construction contract, valued at approximately £16 million excluding VAT, with the bulk of funding coming from the Scottish Government’s national flood scheme protection programme and the remainder from Stirling Council.

A number of localised traffic control measures will take effect in August to facilitate the ongoing works:

• Inverallan Road and Henderson Street will have 3-way traffic lights put in place from Monday 10 August for two weeks
• Allanvale Road (Cornton Road to Union Street) will be fully closed from Monday 24 August until 27 January 2027. Local residential access will be maintained throughout this period.
• Cornton Road southbound (Fire Station to Orchard Road) will be closed from Monday 10 August until early 2027 as part of the first of three phases of work to this section of the Flood Protection Scheme.

That length of closure is exactly why the public events matter as much as the engineering. Flood protection is one of those branches of highways-adjacent infrastructure that residents usually only encounter at the sharp end. If a scheme affects roads, footways, drainage routes or access, the disruption tends to arrive in bits rather than all at once, a fenced compound here, a diversion there, a route that sounds minor until it becomes part of the school run. Public sessions are where those details stop being abstract and start being something a resident can actually plan around, which is exactly what these two events, run jointly by council officers and Balfour Beatty representatives, are designed to do.

Flood work is also always a little stranger than standard roadworks, because much of the value ends up hidden. A resurfaced carriageway announces itself immediately. Flood protection disappears into embankments, walls, outfalls, channels and drainage features that look ordinary on a dry day. The payoff comes later, when the river rises and the town is supposed to stay functional regardless.

Environment, Transport and Net Zero Convener Cllr Alasdair Tollemache framed the August events as part of an ongoing commitment to keeping residents updated as the scheme enters construction, adding that he was pleased to see work starting on a project intended to protect homes and businesses against flooding that is becoming more common and more severe with climate change.

For Bridge of Allan residents, the immediate change is straightforward: the scheme is no longer a future promise. It’s in delivery, with two specific road closures now dated and confirmed. For the wider sector, it’s a reminder that flood schemes live or die twice, once in the hydraulics, and again in how clearly a 14-month closure gets explained to the people who have to drive around it every day.