Penygawsi Primary School


Project Description

Data 472 drilling positions, 13,500m of drilling, 101m of steel casing, 385 tonnes of grout
Client Morgan Sindall Construction
Type of contract Design and build
Construction Period February – March 2023

The Rhondda Valley in Glamorgan in Wales was once one of the world’s most important coal mining regions. Between 1860 and 1939, the region boasted 79 collieries and levels, mining multiple coal seams across the area. This legacy poses a risk to contemporary development as some of the historic workings are unmapped and were abandoned in an unstable condition. 

Aarsleff Ground Engineering were contracted by Morgan Sindall Construction in order to undertake a strict specification of drilling and grouting on a 3m grid across the site. The works included injection of grout into the boreholes to sufficiently fill all cavities, breaks, and fissures in and above the historic workings. This would minimise the risk of measurable subsidence, formation of surface crown holes, and potential damage to structures in the vicinity of the mine workings.

Discover more by downloading the case study

Case Study

A leading UK ground engineering specialist, focusing on multi-discipline excellence and value engineering. We design and deliver some of the UK’s largest ground engineering projects.

Our vision is to bring confidence to those constructing the landscape of tomorrow .

1947. Central Jutland, Denmark. Per Aarsleff borrowed 10,000 Danish Kroner from his father’s life insurance, bought an excavator, and founded Northern Europe’s leading contracting company.

Our biggest asset, our team is composed of the leading experts in ground engineering. Working with collaboration and cohesion at the core of our business, we can guarantee a quick and founded answer to all your questions.

We recruit and reward our people based on our ‘Step into the Blue’ company culture, where we embrace the core values of Life and Health, Trust, and Responsibility.

We do everything to ensure our team and yours work safely on our sites. With our core value of Life & Health, we see safety as a cultural pillar.

Our ISO accreditations are an assurance to you that we take governance seriously. Read our policies to discover more.

The projects that keep society running. Bridges, buildings, transit and rail facilities, embankment support, marine and offshore facilities, mines, airports, and water projects.

Keeping things turning. Sewage Treatment Works, Waste Water Treatment Works, Wind Farms and Wind Turbines, Biomass Plants, and Power stations.

Meeting society’s needs. Nursing and care homes, MOD buildings, Schools and Universities, and small or large-sized residential developments.

Staying on the move. Remediation, bridges, and foundation work are integral to keeping the industry running smoothly.

The landscape of the marketplace. Mega-retail sheds, distribution warehouses, University accommodation, and major supermarket and household name units.

Keeping things afloat. Ports and harbours, coastal defences, river embankments and inland waterways.