Lochnagar Bridge, London, UK

The River Lea, a tributary of the Thames in west London, has historically been a vital part of the infrastructure, but now acts as an east-west barrier, with no river crossings in an almost 2 km stretch. The new Lochnagar Bridge design addresses this issue by providing a crucial active mobility connection in a rapidly transforming part of London, offering significant social and economic benefits.

Pell Frischmann was appointed by Tower Hamlets Council to carry out the design of the Lochnagar pedestrian and cycle bridge. The proposed bridge, adjacent to the Queen Elizabeth Olympic Park, aims to improve accessibility for pedestrians and cyclists and its connectivity with the Thames. Additionally, the design will enhance access to nearby tube and light rail stations on both banks, addressing the existing lack of river crossings within a 2-kilometre stretch. The layout notably features a lower crossing rather than a higher fixed bridge, improving accessibility.

Several alignment options were explored and evaluated against the project’s design objectives. Most of these were fixed bridge configurations that met the Port of London Authority’s navigation requirements. Consequently, bridge layouts were developed for both the preferred fixed alignment and a movable bridge alternative. The option to use lifts instead of ramps was dismissed, as cyclists generally favour ramps for ease of access. Moreover, relying on elevators can limit accessibility if they break down.

The movable bridge option was selected despite its operational costs and maintenance requirements, as none of the fixed bridge options effectively balanced accessibility, route clarity, navigational specifications, public space quality at landings, or clear views from lower tower floors.

To minimise the distance to the river, we also designed a smaller version of the usual river wall system around it. The design ensures there is sufficient space above the defences to raise them in future for better flood protection, as well as for inspection and maintenance.

The new crossing will provide an accessible route for pedestrians, including those using wheelchairs or mobility scooters, along with cyclists. The bridge features an asymmetric steel bowstring arch with a span of 63 metres. Its design pays tribute to the site’s history, not only through its shape but also through the colour palette chosen for its steelwork and details, which are intended to stay visually appealing from all angles.

Due to its distinctive movable design, which is highly accessible for all users, it reduces the length of the structure, allowing for a seamless transition at both ends. Additionally, there is a public space that includes a large seating area facing south, overlooking a nature reserve within a river meander. The area also features artwork by renowned artist Katie Schwab, inspired by the area’s industrial past.

With sustainability in mind, The Lochnagar Bridge incorporates innovative design and engineering to ensure efficient use of carbon footprint.