Project Discription

Project: Williamsgate WTW, Cumbria
Client: Balfour Beatty / MWH JV (Advance)
Contract: NCE 3
Project Value: £2,400,000
Programme: June 2019 to June 2021

The Overview

The project involved designing and constructing new water treatment works near Redmain in the Lake District. The proposal was to transport raw (untreated) water from Thirlmere Reservoir to the new plant for production into a freshwater supply. The site had been designed to merge into the natural contours of the surrounding environment, with considerate colour materials and one building incorporating a green roof to help the site blend into the landscape.

Once completed, the site would be capable of treating 80 million litres of water every day and service the Northwest demand with clean drinking water to strengthen the existing network. The new distribution pipes can take the treated water from the site to our service reservoirs, where it could be stored and ready to supply customers in West Cumbria. The new structures included an underground detention tank, Rapid Gravity Filter Building, Control Building, Workshop, Inlet Building and Sludge Building, including internal modelling, MEICA installations and fit-out.

The Challenge

The project’s budgets were keen; therefore, the proposals needed to be rationalised with the consideration of additional build techniques or specifications. The former of the two was difficult because the works represented merely a building fit-out, and the scope for change in techniques was limited. Specifications and finishes, however, needed to be challenged, and Gallaway was pivotal in doing so. Access and egress to the sites were further limited due to other key trade packages, the timeliness of the Gallaway works and access due to working alongside the newly installed tracks. Just-in-time deliveries needed to be carefully considered and managed. Some materials needed to be delivered and stored well before the works commenced to minimise disruption and enable safe access.

Midway through the construction period came the Covid-19 crisis. Gallaway quickly adapted to the considerable challenges the virus brought, from our team’s delivery of the project to maintaining and growing the supply chain as necessary to continue the works on this key status project. Gallaway amended Risk Assessments and methods of working promptly and maintained site operations to deliver on agreed dates through the crisis period and for the critical MCC units and plant to be installed directly from the manufacturer to the site without any standing periods or storage requirements.

The Solution

Gallaway undertook a rigorous Value Engineering exercise by offering a full design and build package and amendments to specifications but within the confines of the performance specifications. Gallaway further offered external building remodelling to the buildings’ shape and elevations, including materials specification, to offer the best value through equally comparable and approved materials, which offered similar aesthetics and provided cost efficiencies through materials themselves and the simplification of construction. The new proposals sought to amend the existing planning application, to enact the changes and design proposals for exterior materials and samples.

As is often the case, the Gallaway programme considerations were governed by the requirement to maintain our client’s key dates for sectional handovers and, in some instances, the handover of individual rooms. Through collaborative planning sessions, Gallaway amended and adapted the build sequence to suit the client’s important critical dates to hand over areas of our working building to specialist subcontractors. In doing so, Gallaway amended the HSEQ considerations on site for our works and those working around other contractors to ensure the works were completed correctly.