This 22m bespoke bridge and pontoon was constructed using green oak and was designed to span a fishing lake.
This project was designed and constructed by Aquascience for a private client in 2015. The objective was to replace an existing ‘floating bridge’ in order to make the site accessible to disabled anglers. The designs compiled by Aquascience led to a bid for funding and contributions were made by the EA and Natwest Bank. The fishery has been awarded for its services to provide access for all.
Aquascience designed the bridge, pontoon and surrounding access areas to ensure that surfaces and gradients were wheel-chair friendly and that the engineering components were fit for purpose. Consideration was also given to site aesthetics; the bridge was designed to blend with the picturesque environment.
The bridge length was over 20m supported by 150mm green oak piles. The driving of these piles required the use of a bespoke floating excavator with a pile driving head. Site and lake access challenges were overcome by utilising a range of equipment and undertaking thorough risk assessments.
Our specialist construction team were accommodated close to the site for the duration of the project to minimise the project duration and construction costs. Although based in Hampshire Aquascience staff regularly travel to undertake projects where we believe our experience and skills provide a competitive service.
In 2016, Aquascience successfully tendered for three separate but concurrent packages of bridge repairs and replacements spread all over Hampshire. Within these three tender packages, 18 total bridges were included, with requirements ranging from replacing sleepers on old railway bridges to completely removing and replacing derelict and dangerous bridges on public rights of way.
All of the bridges that were replaced were done to meet the requirements of the right of way (e.g. on a bridleway, horse riders must be accounted for) whilst also seeking to best imitate the bridge that was being replaced. This resulted in a wide range of finished structures with no two bridges being the same. Single span bridges up to 7m in length were completed entirely in timber, anything longer than 7m but still required to be single span was installed as a composite bridge – the primary and secondary structural elements were all galvanised steel, with the decking and furnishings being a combination of hard and softwood.
Our longest single span bridge was a 19m composite, crossing the River Rother near Petersfield. The longest bridge of all was a 38m piled, all timber bridge, crossing the River Test in Longparish.
The majority of these bridges required individual, bespoke permit applications for either an Environmental Permit or an Ordinary Watercourse Consent, all of which were applied for in full by Aquascience. Combining the permits with the design works, surveying, access requirements, material orders and labour distribution gives an insight into the capability of the Aquascience team in overcoming logistical challenges.
Each bridge is structurally verified by an attained engineer on behalf of Aquascience, providing loading calculation based on the abutments and main structural elements.
Company Ltd is registered in England & Wales with registration number 05602983.
Registered address is Unit 5/6 Green Lane, Ampfield, Romsey, Hampshire, SO51 9BN.
Aquascience Ltd is an established company specialising in river, lake and wetland restoration, including the design, engineering and delivery of complex river projects, fishery management, water quality improvement and habitat restoration.
The company also operates its own aquatic nursery, supplying a range of native marginal plants of guaranteed provenance
Unit 5-6, Green Lane Farm
P: 01794 368247