IN Brief:
- Dunelm Geotechnical & Environmental has been awarded a £134,285 contract covering eight proposed residential development sites.
- Investigations will assess ground conditions, potential shallow or unrecorded coal workings and possible contamination.
- The contract runs from 28 October 2026 to 30 April 2027, providing information for later design and development decisions.
Dunelm Geotechnical & Environmental has been awarded a £134,285 contract by Newcastle City Council to investigate ground conditions at eight proposed residential development sites in the West End of Newcastle upon Tyne.
The Phase 2 ground investigation programme will assess potential shallow and unrecorded coal mining hazards, characterise possible land contamination and establish geotechnical information to support future housing development, design and permitting decisions.
The contract is valued at £134,285 excluding VAT, equivalent to £161,142 including VAT, and covers a period from 28 October 2026 to 30 April 2027. The award concerns site investigation and engineering assessment rather than the construction of the proposed homes.
Newcastle’s West End contains land affected by different periods of residential, commercial and industrial development. Conditions below individual sites can vary according to their previous use, the presence of buried structures and the natural geological materials beneath them.
Ground investigation provides evidence about those conditions before a development proceeds to detailed foundation design. Soil, rock, groundwater and the presence of man-made materials can all influence the suitability of a site and the engineering arrangements required for construction.
The eight-site commission specifically identifies potential shallow and unrecorded coal workings as a risk for assessment. Historic underground mining can create voids or areas of disturbed ground, while recorded mine plans may not capture every excavation undertaken during earlier industrial activity.
The existence of a mining hazard designation does not establish that unstable ground has been found. Engineers must investigate whether workings are present, identify their position and condition where possible, and assess whether they could affect the proposed structures or construction activities.
Desk-based assessments can combine geological maps, historical records, mining information and previous investigation reports. These sources help identify where physical investigations should be concentrated, particularly when earlier land use suggests that the subsurface may differ from undisturbed ground.
Physical investigation can involve exploratory boreholes, trial pits, sampling and testing. The selection of methods depends on the expected geology, the required depth of investigation, access limitations and the questions that must be answered for the proposed development.
Boreholes allow engineers to examine successive soil and rock strata and obtain samples for laboratory testing. Depending on the drilling method and ground conditions, they can also support groundwater observations and the installation of monitoring equipment.
Trial pits provide direct access to shallower ground, allowing inspection of material composition, buried obstructions or existing foundations. They may be particularly useful where made ground or former construction activity has introduced changes near the surface.
Not every investigation site requires the same techniques. A location with a potential mining hazard may need a different investigation strategy from a plot where the principal uncertainty concerns shallow made ground, groundwater or contamination associated with a previous commercial use.
Dunelm operates its own drilling equipment and provides geotechnical, environmental and in-situ testing services. The contractor’s capabilities include investigations for residential developments, infrastructure projects and public authorities, supported by engineering staff and specialist drilling teams.
Field testing can provide information about ground strength and deformation characteristics. Standard penetration testing, cone penetration testing and other methods may be used where appropriate, with their results interpreted alongside soil samples, geological records and the anticipated structural loads.
The Newcastle commission has not established a public schedule of individual boreholes, drilling depths or testing locations. Those elements will depend on the investigation design and the conditions encountered at each development site.
Foundation design requires an understanding of how the proposed building loads will be transferred into the ground. The bearing capacity and settlement characteristics of the soil influence whether a shallow foundation arrangement is suitable or whether deeper foundations or ground improvement may need consideration.
Where mine workings or voids are confirmed, engineers may assess options including treatment of unstable ground, changes to foundation arrangements or alterations to a proposed building layout. Such interventions must follow the actual investigation findings and cannot be assumed before the ground conditions have been established.
Contamination assessment forms a separate element of the work. Former industrial uses can leave substances within soils, groundwater or buried materials, requiring an assessment of their potential effect on construction workers, future residents and the surrounding environment.
Environmental risk assessment considers the relationship between a potential contamination source, a pathway for exposure and an affected receptor. The presence of a substance in the ground does not necessarily establish an unacceptable risk without considering its concentration, mobility and the proposed use of the site.
Residential development can introduce exposure pathways that differ from those associated with previous commercial or industrial uses. Gardens, landscaping and the construction of drainage or other underground services may change how people and the environment interact with the ground.
Laboratory analysis of selected soil and water samples can help determine the type and concentration of substances present. Engineers then assess whether the findings warrant further investigation, remediation or protective measures as part of the proposed development.
Groundwater conditions may influence both geotechnical and environmental decisions. Water levels can affect excavations and foundation construction, while groundwater movement may provide a pathway for contaminants where suitable conditions exist.
Investigations must also account for existing utilities and other buried infrastructure. The location of services can constrain drilling positions and excavation, making advance records, site inspections and appropriate detection procedures important to safe delivery.
The results of the investigation programme will support the council’s subsequent development decisions. Engineering reports can identify ground constraints, provide design parameters and recommend additional investigation or treatment where justified by the evidence.
Those findings can also inform construction cost estimates and the selection of suitable development layouts. Uncertainty about mine workings, contamination or foundation conditions can affect project design and programme decisions before a main building contractor is appointed.
Dunelm is headquartered at Meadowfield in County Durham and undertakes ground investigations throughout the UK. Its Newcastle appointment provides a defined package of technical work covering eight potential housing sites rather than a commitment to deliver a specified number of new homes.
The investigation period extends to 30 April 2027. The resulting geotechnical and environmental information will provide a basis for assessing the development constraints and foundation requirements of the individual sites before subsequent construction decisions are made.
