• Emergency Flood Repairs - Bawdsey

    East Lane bawdsey EmergencyWorks

    Following the record-breaking storm surge and exceptional weather during the wettest winter in 250 years, many of EA's river and coastal defences suffered significant damage. JacksonHyder responded to the Agency's request for emergency support and undertook repair work at six locations on the East Anglian coastline.

    In February 2014 gales swept away a large section of the sea defence embankment protecting some 600 acres of agricultural land at Bawdsey, Suffolk. JacksonHyder mobilised with 48 hours of EA's call for help to begin emergency repairs to a jointly agreed design. Using surplus rock from the earlier sea wall defence work and fill material imported from RAF Bentwaters, the team successfully repaired a section approximately 80m in length over a 4 week period.

  • Salcombe Fish Quay
    Salcombe Fish Quay 1000x350px

    Salcombe Fish Quay was constructed in the early 1980's to provide a separate slipway and improved landing facilities for the local fishing fleet. Over the years the quay sheet pile walls had become badly corroded and shore side facilities and access for the fisherman needed significant improvement. An economic assessment by Hyder concluded that loss of the quay would lead to significant impact on an industry worth over £1.2m/year.

    This project provided a new sheet pile quay wall and other improvements to secure the long term future of the quay and its associated economic activity. This project addressed some major challenges including: Delivery of essential improvements within a limited client budget through innovative design and value engineering; Construction of a new quay wall whilst retaining an operational quay; Complex 3D modelling of the quay structure to optimise the design.

    The quay is within a Site of Special Scientific Interest (SSSI). Environmental considerations during the design of this project included: New pollution interceptors, a boat wash down area and utilities upgrades; A suspended deck quay wall extension to minimise impact on the SSSI  Using a textured surface on the sheet piles to encourage marine growth.
  • Nottingham Left Bank FAS
     DSC6410

    Delivered by Jackson under the Environment Agency's previous NCF2 Framework, the Nottingham Left Bank Flood Alleviation Scheme was the largest inland flood defence in the UK, and reduced flood risk to 16,000 dwellings when it was completed in September 2012. This flag ship scheme was valued at £51m and extends 27Km along the River Trent, from the M1 motorway in the west to the suburb of Colwick to the east of city centre. Delivered 13% under budget and 6 weeks ahead of schedule, credit for the £6m of savings can be attributed to the 'Structured Value Engineering' process implemented by the project team from the outset.

    This scheme was a prime example of the benefits a truly integrated team can bring, and therefore JacksonHyder's plan for the future is simple: Working as a fully integrated contractor-designer team, JacksonHyder aims to offer greater efficiency combining fresh thinking and experienced delivery.
  • Canal & River Trust
    Changeline Bridge

    Hyder is the Canal & River Trust's, formerly British Waterways, sole Engineering and Environmental Framework consultant for Professional Services. One of the key factors in Hyder's appointment to this framework was its understanding of the responsibilities the Trust has to manage its assets and maintain the historical fabric and heritage of the waterways network, over 2,000 miles of waterways across England and Wales.

    Hyder's approach has been to develop close working relationships between its staff and the Trust, with the objectives of sharing knowledge, innovating and, where possible, standardising solutions in order to achieve savings in cost and programme and provide effective solutions to ensure the sustainable heritage of the waterways.

    Working with the Canal & River Trust has proven that working as a fully integrated team works best for all parties, and that's what JacksonHyder aims to achieve. We look forward to applying our multi-disciplinary engineering and environmental expertise to consistently deliver safe, sustainable solutions, in a cost-effective way.
  • North East Culverts
    NE Culverts 1000x350px

    The JacksonHyder team are currently project managing a complete survey/ reporting/ scoping and design development programme for all culvert refurbishment in the North East region. Since mid June the team have completed 24 culvert surveys, preparing detailed concise structural condition reports, defining scope of work specifications and developing the design and agreeing target costs. Refurbishment work will begin on five sites in October 2012.

    On a number of culverts the team have determined the asset not to be failing and that no refurbishment works are required. As a result of this, the client has been able to direct financial resource to the poorer condition assets where the refurbishment works give best cost benefit.

    The refurbishment works are being planned grouping sites around a central hub site enabling activities to be undertaken efficiently with the ability and flexibility to move resources locally between sites to suit the programme and prevailing weather and more importantly, watercourse conditions. The works comprise concrete repairs, wall underpinning and scour hole infilling, debris removal and structural strengthening of soffit slabs and building foundations.
  • Rye Harbour Western Training Wall
    Rye 1000x350px

    Jackson was recently involved in a £9m scheme to replace the 1400m long western training wall on the River Rother in Rye Harbour, East Sussex. The wall was identified as having a significant chance of catastrophic failure by 2016, with many small failures having occurred over the last 30 years. Replacement of the wall was required to maintain the multi million pound economy supported by the River Rother in Rye.

     The site was located within a SSSI, SPA, SAC and potential RAMSAR site, adjacent to the fast flowing River Rother, a key navigational route into Rye Harbour. The project team strove to achieve efficiencies on this scheme right from its inception, targeting all areas of the project programme including funding routes and procurement to deliver a successful scheme within budget on an accelerated programme. Through innovation and collaboration, the team was able to reduce the project programme by 18 months, with tangible efficiencies in excess of £970k (11%).
  • Godmanchester Flood Alleviation Scheme
    Godmanchester 1000x350px

    Jackson recently constructed this flood alleviation scheme which was designed to protect for over 500 residential and commercial properties in Godmanchester, reducing the flood risk froma 5% risk of flooding to a 1% risk of flooding in any given year. New flood defences have been constructed along the riverside between the A14 (Cook's Stream) and No. 39/40 West Street, a distance of 1.5Km.

    The project included the construction of flood defences adjacent to the River Great Ouse at Godmanchester, in both private gardens and public areas, primarily to the southern and eastern banks of the River Great Ouse. The works included the provision of raised earthworks bunds, sheet piled walls, flood gates, mini piling at the Causeway and flood retaining walls on constructed foundations, working from the River Great Ouse in both the main flow channel and the restricted flow Mill Weir Channel. These works were carried out in both areas accessible to the general public and in private residential gardens.
  • Malmesbury Flood Risk Modelling Study
    Malmesbury 1000x350px

    Located in the southern Cotswolds, Malmesbury hit the national new headlines in November 2012 when the River Avon, swollen by record breaking rainfall, overtopped its banks and flooded the town centre. Around 40 properties were affected, including one prior to the issue of a flood warning, and four people had to be rescued from their homes by fire crews.

    Following this incident, JacksonHyder were commissioned to review and update the existing hydrological and hydraulic models of the River Avon. The existing models were built over nine years ago, and there have since been significant advances in modelling techniques. 

    JacksonHyder will be using the updated models to test bespoke flood risk management options, including potential improvements to St. John's Bridge, which is grade II listed. 


  • By Brook Flood Risk Modelling Study
    By Brook 1000x350px

    The By Brook is a tributary of the River Avon. It rises near junction 18 of the M4 and flows in a general southward direction through the villages of Burton, Castle Combe (filming location for War Horse), Slaughterford and Bathford. 

    JacksonHyder was commissioned to carry out a hydrological and hydraulic assessment of the By Brook and two of its tributaries, the Burton Brook and the Broadmead Brook, with the aim of improving the Environment Agency's understanding of the risk of flooding to the communities located along this 34km stretch of watercourse. 

    As there are no existing models of the By Brook, this will be the first detailled assessment and in addition to using best practice approaches to map the spatial variation in flood depth and flood hazard, we will be testing blockage scenarios for mulit-arch bridges in Castle Combe where 16 properties were flooded in November 2012.




  • Emergency Flood Repairs - Hullbridge

    Hullbridge Emergency Works 1000x350px

    Hullbridge on the River Stour in Essex is protected by sheet piled river walls. Over time, scouring has resulted in a loss of material on the river side of the wall causing it to rotate forward over a 55 – 60m length. The huge tidal surge of December 2013 caused the wall deflection and consequent depression in the footpath to significantly increase making it unsafe. With further high tides expected in the New Year, the EA requested help to prevent a catastrophic failure.

    To stop further forward movement of the sheet piles emergency measures were needed. JacksonHyder devised a temporary fix using bulk bags filled with ballast material covered and closed at the top placed on the toe of the revetment that prevented further slipping.

    A permanent repair will be effected as part of the EA's Asset Recovery Programme.

  • River Thames Capacity Improvements and Flood Channel

    Teddington Floods 1000x350px

    JacksonHyder has been working with the Environment Agency to develop a clear scope and business case for Flood Channel and Capacity Improvement Works (FC&CI) to reduce flood risk to essential infrastructure and 20,000 properties on a stretch of the River Thames between Datchett and Teddington. Whole life costs estimated at £538m. ‘Outline Business Cases’ form part of the approval process required by Treasury for public sector work.

    Our role was to provide technical support and challenge as part of integrated project team. We provided adhoc advice and produced several appendices including a risk register, programme, budget plan and scope for the development of the outline business case. This included all tasks to deliver the scheme (hydraulic, optioneering, geotech, sediment and ground water modelling, WFD and environmental compliance, economics).

    This was a high value project with sensitive planning and consent issues. The work was also produced in a very tight time frame to meet client approval programmes to enable the next stage to progress on time. Though open, flexible and responsive work JacksonHyder provided the support and deliverables on time and below budget.
  • Paddock Wood Flood Alleviation Study

    Paddock Wood Combo 1000x350px

    The town of Paddock Wood in Kent suffers from flooding from a range of sources; Surface Water, Main River, Ordinary Watercourses. It lies on relatively flat land and has seven watercourses that affect drainage in the area. Flooding has been known to occur from surface water as well as from rivers. JacksonHyder was appointed by Kent County Council to develop an integrated 2d hydrodynamic model of the main river, ordinary watercourses, sewers and any infrastructure that would affect the drainage of the town of Paddock Wood in order to provide a better understanding of the flooding mechanisms.

    We have used survey and network data provided by Kent Council and Southern water to enhance an existing ICM model. This has shown that certain watercourses and assets have a greater or lesser affect than previously thought. This evidence is the foundation for exploring ways to reduce flood risk, and also engage with the public. It will also help inform future development plans for the town (it is likely that an additional 600 houses will be built in the future). We are modelling a selection of options that have been agreed with the client, this in turn will inform our economic analysis and provide evidence to support future business cases or strategies to reduce flood risk in Paddock Wood. A public engagement event will be held in the autumn to inform the public of our findings.