Supply Chain - Water Treatment - Contractors
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Case Studies
Lamella plate sedimentation tanks - Courtesy of Murphy Ireland[/caption]
Overview of site showing the build complexity - Courtesy of Murphy Ireland[/caption]
Another key challenge on this project was keeping the existing plant operational for the entire construction phase to its full capacity. It was essential that the works were carried out with no interference to the existing water treatment process.
Working within a city presented several logistical constraints including constrained and restricted site access. Therefore considerate, efficient, and well-planned logistics plans and methodology were integral to minimising disruption for the locality and the smooth running of the construction works. Construction Site Traffic Management (CSTM) was meticulously managed and ensured no interference with the existing plant operations. Staged infill operations were undertaken to minimise this disruption.
Significant off-site construction was undertaken in addition to rigorous off-site factory testing, resulting in a reduced number of construction defects and a smooth and efficient commissioning process.
The commissioning plan was developed throughout the life cycle of the works and signed off by the client three months ahead of planned commissioning. This gave enough time for all parties to be briefed and understand commissioning requirements, durations, key activity outputs and agree standards to be reached.
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UV disinfection - Courtesy of Murphy Ireland[/caption]
UV-treated water - Courtesy of Murphy Ireland[/caption]
Alum bulk storage - Courtesy of Murphy Ireland[/caption]
Rising main pressure vessel - Courtesy of Murphy Ireland[/caption]
Final pumping - Courtesy of Murphy Ireland[/caption]
Stithians WTW and Stithians Reservoir dam prior to the commencement of the works - Courtesy of Galliford Try[/caption]
Model extract showing the existing works on the left, the new process plant on the right, and the GAC at the top of the slope - Courtesy of Galliford Try[/caption]
Stithians GAC steel frame prior to cladding - Courtesy Galliford Try[/caption]
Off-site build was also the chosen methodology for the chlorine contact tank, the clean backwash storage tank and the rinse/regen tank, all of which were precast concrete panel system installations. The new sludge thickener tank was designed as glass coated steel, again off-site built with fast installation time.
Precast concrete storage tanks were the next structures to be completed, at the same time as the underground pipework. All the structural elements have been linked together with process pipework and an extensive underground cabling network links them electrically back to the main South West Water control room.
Inside the GAC gallery: Upper level control valves and valve actuators from Rotork Controls - Courtesy of Galliford Try[/caption]
UV building process pipework and support concrete for GRP kiosk - Courtesy of Galliford Try[/caption]
21m diameter dirty back wash tank - Courtesy of Galliford Try[/caption]
Below ground large diameter pipework required to be installed around existing structures and services - Courtesy of Galliford Try[/caption]
A further tank will be used for the collection of GAC backwash and rinse. The GAC backwash water is not being combined with the existing site waste and supernatant system, and instead will be returned via new pumps directly to the inlet works. Appropriate sampling is being installed to confirm it is of suitable quality to return and can be diverted into the existing wash water system if required. This sustainability driven solution improves the efficiency of the plant, reducing pressure on incoming water resources whilst avoiding discharges to the environment.
During the outline design phase, an existing redundant structure on site was identified as being suitable for use as a collection tank for GAC regeneration wastewater. Re-using this structure provides improved value for money, whilst reducing the carbon consumption and the environmental impact of constructing a new concrete structure, as per the original concept. The re-purposing works will require some minor inlet and outlet pipework modifications, installation of new pumps and removing of the redundant equipment.
FRC construction of GAC cells - Courtesy of Galliford Try[/caption]
GAC building pipework gallery - Courtesy of Galliford Try[/caption]
GAC & UV buildings with interconnecting pipework - Courtesy of Galliford Try[/caption]
Fit out of the contactor gallery prior to the erection of the steel clad portal frame building - Courtesy of Galliford Try[/caption]
Currently (May 2023) all the structures are nearing completion, mechanical installations are well advanced with electrical fit outs to commence late summer 2023. Large diameter site-wide interconnecting pipework is currently being laid, with the vast majority programmed to be completed during the summer and early autumn months of 2023 to take advantage of more favourable ground conditions.
Process Commissioning is to commence in late 2023 and is scheduled to be completed well in advance of the Drinking Water Inspectorate (DWI) Compliance Date 31 March 2025.
Clockwise from top left - Dechlorination plant, wastewater tanks, chlorine contact tank and treatment building - Courtesy of MMB[/caption]
Multiple supply chain interfaces were modelled to proactively reduce snagging - Courtesy of MMB[/caption]
The additional pressure required would require replacement of the borehole pumps and over 4km of mains in serviceable condition. Instead, the pressure head was broken within the site, reducing operation and maintenance risks, and improving site control and resilience through installation of high efficiency booster pumps to supply the network. Pumping of waste flows was minimised through agreeing discharges into the local sewer and surface water network, with dechlorination included for treatment of non-compliant flows. Pumping of drainage flows was also avoided through minimising site access roads, maximising green space and incorporation of SuDS trench and lagoon within the site footprint.
Digital delivery was preferred from the onset, and the site location was GPR and laser scanned to produce an accurate 3D model of the current land and subterranean utility infrastructure. This model was developed further with key suppliers and multidisciplinary designers to progress to a full site-wide model of the civil, electrical, mechanical and process elements.
The pressure filter, chemical dosing and metalwork suppliers uploaded models of their discrete works packages into the selected Common Data Environment (CDE) BIM360. The packages were incorporated into the overall site model, produced in Revit. This enabled the MMB design team to accurately model surrounding road structures, interconnecting pipework, services and road infrastructure in both Revit and Civil 3D. The 3D model is earmarked for use as a digital twin, to improve asset management and aid with efficiency of the everyday site operation.
The site was designed such that all key instrumentation is above ground, but transfer pipework between treatment stages is below ground, giving full access to all valves and dosing points. Through development of the 3D model, operators were able to fully review the site in advance of a spade being struck, leading to changes to further mitigate operational and site hazards. Rethinking of the operating pressures has reduced operator risk within the building and the new process utilises more resilient process units than previously, incorporating a sophisticated control philosophy which minimises unintended shutdowns and enables restart at the push of a button, rather than a complex series of manual valve operations.
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Treatment process units being installed after off-site manufacture and testing - Courtesy of MMB[/caption]
Off-site manufacture opportunities were identified to minimise personnel operating on a relatively small site. Chemical dosing facilities were manufactured and tested within kiosks and delivered to site as plug-and-play elements of the process, improving quality control through factory testing and commissioning. Vertical pressure filter units, associated pipework, and metalwork access gantry were all pre-assembled and tested prior to final offload and assembly on site. This approach was taken for the complex manifold pipework weaving between and connecting the site process plant.
The 3D model was utilised by stainless steel pipework fabricators to design and detail the pipework for accurate off-site manufacture, eradicating cutting on site. Building on lessons learned from Murton, the contact tank design was changed from in-situ build to a semi pre-cast assembly, reducing the on-site build programme of the structure and reducing the trades and temporary works required.
Covid19 hampered the ability to carry out informal meetings, though the digital delivery of the project meant that communication was not impacted during the critical latter stages of the design. The 3D model was utilised to facilitate key coordination meetings including ALM and HAZOP reviews, helping both MMB and NWG communicate proposals to non-technical colleagues. Enabling NWG to utilise the same model during design aided with design acceptances and operational reviews of proposed site processes.
Fire and hazard reviews were carried out utilising third person perspective within the model. The integrated use of BIM360 brought more of the supply chain into the collaborative solution development allowing all stakeholders to visualise the final product in a way not possible with traditional 2D drawings. This allowed for greater clash detection prior to construction enabling designs to be tweaked at low cost in the office, reducing standing time on site. Key interfaces between each mechanical supplier were digitally inspected in advance of installation, reducing the likelihood of common avoidable defects in major treatment projects.
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Complex subterranean service network required careful clash detection - Courtesy of MMB[/caption]
(left) Precise installation of below ground infrastructure and slab penetrations prior to main slab pour and (right) treatment building slab cast prior to superstructure installation - Courtesy of MMB[/caption]
The accuracy minimised soil disposal resulting from over dig and designing out thrust blocks through modifications to the pipework specification further reduced excavation. Under licensed exemptions, 1000t of excavated soils were diverted to local agricultural projects and 1000t of compound stone was re-purposed for an off-site access road. Similarly, 1000t of clay arisings from a nearby project were utilised within the Wooler site.
Utilising CLIP (Collaborative Lean Improvement Programming) planning and careful sequencing halved the number of people working on site, compared to the sister project at Murton WTW, minimising the number of long journeys associated with rural working. Local suppliers and local staff were embedded within the delivery team, further reducing the embodied carbon impact. Accurate modelling of the proposal in advance of construction minimised material wastage in cut to suit elements of pipework, steelwork, and reinforcement.
MMB utilised the local supply chain as much as possible. Major successes were brought about through engaging with a heavy steel fabricator based within a quarter of a mile of the site and an electrical installation contractor based in Northumberland, rather than usual supply chain partners. Utilising more local suppliers meant that the level of service and quality provided was high, with benefits of carbon reductions and reduced transport of major steel elements along busy rural single carriageways. Through inviting NWG, stakeholders and supply chain to CLIP planning sessions, MMB identified programme savings for all parties through sequencing of site tasks and identifying mutually beneficial opportunities, such as sharing plant to reduce vehicles on site. For example, bringing electrical and major steel subcontractors together identified opportunities for cable containment hangers to be installed within the fabrication works at no additional cost, reducing work at height risk and task time for cable installation teams.
Construction sequencing, temporary works and site aesthetic were all modified to minimise impact on the local community. Installation of the permanent access point to the site was prioritised in the programme to minimise traffic management on Berwick Road, a main artery for the village. Moving treatment processes inside the main building negated the requirement for additional security fencing and the building itself was designed to resemble agricultural buildings in the area. The permanent site footprint was minimised as much as possible but in doing so, a larger temporary compound area was necessary. The project team worked with local landowners to identify the best location for the temporary works to reduce this impact, and temporary laydown areas were returned for use as soon as sequencing allowed.
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Precast contact tank during construction - Courtesy of MMB[/caption]
Jobs
- Senior Civil Engineer (6463)
Senior Civil Engineer (6463)The Opportunity
Following a number of successful frameworks bids across the water industry, and in preparation for the most challenging AMP ever, we are expanding our high-performing engineering teams across the country. In Newcastle, we are excited to have been appointed as a Strategic Technical Partner by Northumbrian Water for the AMP8 period. Stantec provide a range of technical enabling, solution delivery and design services to support Northumbrian Water in achieving its vision to be the leading provider of sustainable water and wastewater services. As part of our long-standing relationship with Northumbrian Water, including the ongoing ESH-Stantec joint venture, we will continue to develop innovative solutions to support their delivery of capital investment across both infrastructure & non-infrastructure projects. In order to continue providing our clients with our expert service, we are looking to recruit a Senior Civil Engineer into our team Newcastle on the picturesque Quayside. You will become part of an international team, redefining our landscape with sustainability, the environment and the communities we serve at the heart of everything we do. As a Senior Civil Engineer, you will work across the entire project lifecycle in asset planning, strategy, concept design, outline design & detailed design. You’ll be responsible for delivering civil engineering solutions, guided by our Principal Engineers & Design Leads, whilst also supporting & mentoring our more junior engineers.You can find out more about our work in the water sector here: Stantec H2O+U - UK.
About You
We are interested in speaking with passionate engineers with design experience within the UK water industry. You’ll hold a degree in Civil Engineering and ideally have achieved Chartered status with a relevant professional body such as ICE or CIWEM. You will have gained experienced delivering community focused projects, whilst working collaboratively with multi-disciplinary teams to delivery innovative solutions. We will support your growth & development through training & project exposure, though prior experience within storm overflows, SUDS, surface water management & sewage treatment would be beneficial.
About Stantec
The Stantec community unites more than 31,000 employees working in over 450 locations across 6 continents. We have been working with our clients and communities in the UK for over 150 years. We plan, design, deliver and manage the development and infrastructure needed to support the creation of sustainable, healthy and prosperous communities. Our teams provide effective and relevant solutions, translating our clients’ vision into valued consents, deliverable plans for projects and programmes, and efficient designs for delivery, based on technical excellence and deep market insights. We deal with today’s challenges, but also keep a fairer, better tomorrow in sight, looking at how we deliver clean growth, support radical changes in our economy and meet the needs of future communities. Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment. Building an inspired, inclusive work environment that attracts, supports, and develops world-class talent is a crucial key to our success. If you are excited by this role but worry that your experience doesn’t exactly align, we encourage you to apply. - Senior Civil Engineer - Water (6286)
Senior Civil Engineer - Water (6286)
The opportunity
Across the entire business, Stantec are building on top of what’s already been a highly successful period of growth. Our strategy within the Water division for 2023 and beyond is creating a number of new exciting opportunities across the business. We partner with the top water clients across the UK, work on some of the largest, most iconic water projects in the industry and we promise to design with community in mind by reducing environmental impacts and improving social impacts. We enable the delivery of sustainable development and infrastructure projects that adapt to and mitigate the effects of climate change. Our Civil Engineers work across the project lifecycle in asset planning / strategy, concept design, outline design and detailed design. We work in a variety of project areas within the water sector, including clean water treatment and networks, wastewater treatment, wastewater networks, flooding, and urban drainage. You can find out more about our work in the water sector here: Stantec H2O+U - UK. You’ll be responsible for the project’s civil engineering design, the leadership of civil engineering teams and will work alongside our overall project design leads to ensure successful project delivery and outcomes for our clients. You will also have access to Stantec’s world-class expertise to help you deliver cutting edge design.About You
You’ll have experience working as a Civil Engineer on projects within sectors such as the water, environment or other related infrastructure sectors. Ideally you will hold Chartered or Incorporated member status with a relevant professional body such as ICE or CIWEM. You’ll have a passion for the water and environment sector and supporting our developing civil engineers. You’ll also be experienced in successful project delivery and working collaboratively with project teams to develop innovative solutions. Finally, you will have experience of working in a client facing role, leading client engagement and collaboration on a regular basis.
About Stantec
The Stantec community unites more than 31,000 employees working in over 450 locations across 6 continents. We have been working with our clients and communities in the UK for over 150 years. We plan, design, deliver and manage the development and infrastructure needed to support the creation of sustainable, healthy and prosperous communities. Our teams provide effective and relevant solutions, translating our clients’ vision into valued consents, deliverable plans for projects and programmes, and efficient designs for delivery, based on technical excellence and deep market insights. We deal with today’s challenges, but also keep a fairer, better tomorrow in sight, looking at how we deliver clean growth, support radical changes in our economy and meet the needs of future communities. Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment. Building an inspired, inclusive work environment that attracts, supports, and develops world-class talent is a crucial key to our success. If you are excited by this role but worry that your experience doesn’t exactly align, we encourage you to apply. - Civil Engineer - Water (6331)
Civil Engineer - Water (6331)
The opportunity
Do you have a passion for Civil Engineering ? Are you driven to create solutions for the unprecedented climate, environmental, and efficiency challenges facing our clients and the wider community? Then make a real difference and join us at Stantec! We are excited to continue our growth journey in Ireland and Northern Ireland and we have exciting plans for expansion in 2025 and beyond. We look forward to continuing our work with Uisce Eireann on the Engineering Design Services Framework and in Northern Ireland, we are proud to have been appointed to Northern Ireland Water’s IF182 Professional Services Framework. Taoiseach Simon Harris recently opened our new Dublin office, and we have now also moved to a new city center office in Belfast. This exciting pipeline of work, coupled with the scale of opportunity across the AMP8 cycle in the UK means that we seeking Civil Engineers at all levels with experience in the water/wastewater industry to join us. We are flexible with location so the position can be based in Dublin, Belfast or elsewhere. You will have the opportunity to join a dynamic team spread across the UK and Ireland, supporting the delivery of a variety of projects as part of a major capital investment programme.You will play an important role in the team, developing technical solutions & providing advice to our clients. You will provide technical expertise to ensure projects are delivered to cost, schedule & quality standards and work collaboratively amongst multi-disciplinary teams to ensure first class delivery of our projects. You will work closely with external stakeholders & clients to develop long term relationships.About You
You will be Degree qualified (or equivalent) in Civil Engineering or other relevant subject and have some experience of working within the regulated water industry.You will have knowledge of water and wastewater infrastructure/networks and treatment. Due to the nature of upcoming projects, ideally, you will also have experience in areas such as Clean Water and Wastewater Treatment, Trunk Mains and Large Diameter Pipeline Design.Ideally, you’ll have previous consultancy experience in a design role.Most importantly, you’ll embody our values and ethos of client focus and service excellence and have a passion for making a difference in the Water sector.Why Join us?
- Our People Culture: We're a close knit team and very proud of our friendly and collaborative environment
- Growth: We're on an exciting growth journey in Ireland and Northern Ireland - we want you to be part of it!
- Awards: Stantec were awarded the International Consulting Firm of the Year and Best place to work - Large Consulting Firms at the 2024 NCE awards as well as being consistently recognised in the top 10 Corporate Knights most sustainable companies in the world.
- Great Benefits: Competitive salary, pension plan, holidays, free private medical insurance, discounted gym membership and lots more.
- Flexible working arrangements
- Great Projects: We have secured positions on both the Uisce Eireann and NI Water Frameworks and are delivering a wide variety of projects that will make a real difference to our communities
- Industry leading training and development as well as paid for professional subscriptions
About Stantec
The Stantec community unites more than 31,000 employees working in over 450 locations across 6 continents. We have been working with our clients and communities in the UK for over 150 years. We plan, design, deliver and manage the development and infrastructure needed to support the creation of sustainable, healthy and prosperous communities. Our teams provide effective and relevant solutions, translating our clients’ vision into valued consents, deliverable plans for projects and programmes, and efficient designs for delivery, based on technical excellence and deep market insights. We deal with today’s challenges, but also keep a fairer, better tomorrow in sight, looking at how we deliver clean growth, support radical changes in our economy and meet the needs of future communities. Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment. Building an inspired, inclusive work environment that attracts, supports, and develops world-class talent is a crucial key to our success. If you are excited by this role but worry that your experience doesn’t exactly align, we encourage you to apply.