Sustainable Platform, Boardwalk & Bridge - RSPB Middleton Lakes

Overview

In support of RSPB’s long-standing environmental goals, Bison Bridges was commissioned to replace a deteriorated timber platform and boardwalk at the popular Silt Pool Lookout in Middleton Lakes Nature Reserve. The brief was clear: design and install a more durable, low-maintenance alternative that would blend into the natural surroundings and have minimal ecological impact.

As a separate requirement there was also a need for a 7.0m span bridge to replace an existing failed structure. The bridge location is well suited to a long-life Bison bridge; with tree cover and plenty of water around, a timber structure would have provided a lower initial purchase cost (for materials) but only a disappointingly short life span.

Our solution was a 100% recycled and 100% recyclable Re-life plastic platform and boardwalk, supported by low-impact ground screw foundations — a perfect fit for wetland environments and nature-sensitive sites.

Project Requirements

• Dismantle and dispose of an existing decayed timber platform and adjacent boardwalk
• Supply and install a like-for-like structure using sustainable, long-life materials
• Avoid excavation or heavy machinery that could disrupt habitats
• Ensure safe, non-slip public access and seating
• Deliver a solution that aligns with the RSPB’s ecological values

Materials That Last: Why Re-life Plastic?

For this project, Bison Bridges selected Re-life plastic, a high-quality material that is:

• 100% recycled and 100% recyclable
• Splinter-free and rot-proof, even in consistently wet environments
• Extremely durable & live load tested to relevant Eurocodes, making it ideal for high-footfall public sites
• Low-maintenance, with no painting or treatment required over time

By replacing timber with Re-life recycled plastic, we ensured the new platform offers long-term resilience without compromising on appearance or function.

Construction Highlights

Our experienced team delivered a complete removal and rebuild solution using a sustainable approach.

Key build elements included:

• Ground screws, installed to layout drawing – no concrete, no digging
• Re-life plastic bearers, bolted between supports
• Re-Life joists, mounted on bearers and screwed for strength
• Re-life deck boards, offering safe, slip-resistant access
• Re-Life kickrails, for added security along both sides of the deck
• A dual-rail barrier and top leaning rail, creating a safe, comfortable viewing point
• 3 fixed benches, crafted from Re-life plastic to replicate the original timber design

A Low-Impact Foundation System

To support this eco-friendly structure, Bison Bridges used a ground screw foundation system, eliminating the need for excavation or concrete. Ground screws offer:

• Immediate load-bearing capacity
• Minimal ground disturbance
• Year-round installation, even in wet or remote locations
• Reduced embodied carbon, compared to concrete bases

Together with recycled plastic materials, this approach provides a truly sustainable, long-life solution for outdoor platforms and boardwalks.

Project Outcome

The new platform and boardwalk deliver enhanced safety, stability, and environmental performance. Visitors to RSPB Middleton Lakes can now enjoy a splinter-free, rot-proof, and weather-resistant structure that fits effortlessly into the reserve’s landscape.

With no ongoing treatment or upkeep required, the RSPB team can focus on conservation — not repairs.