Maldon, Essex · Since 1974
We have.Since 1974, I D Corcoran has dug, drained, poured and repaired for main contractors, asset owners and homeowners. Twelve of those years were spent based inside Bradwell Power Station.
Who We Work For
The company Magnox relied on for reactive civils at Bradwell is the same one that digs the footings for a family extension. Same standards, whatever the size of the job.
Groundworks and civils packages from a prequalified team that has worked as subcontractor, main contractor and principal contractor.
A reactive civils and concrete team for live, restricted and high-hazard sites, from emergency works to planned maintenance.
Foundations, drainage, driveways and extensions, built by the team trusted on power station sites.
What We Do
From setting up the site to the final finish, one team handles it. Choose a number to see what we do at each layer, and where we’ve done it before.
Layer 1 of 9
Welfare, fencing, site strip and the demolition of redundant slabs and foundations, so the main works start on a clean, safe and well-run site.
ProofAt Drax, we started with the site strip and the demolition of redundant slab foundations.
Layer 2 of 9
Bulk and detailed excavation, ground reduction and land remediation, with our own CPCS-trained operators on the machines.
ProofGround reduction and French drains around the Lakeside care accommodation, to keep flood water away from the homes.
Layer 3 of 9
We manage and attend specialist piling teams, then cap the piles and blind them, ready for the steel and formwork.
ProofAt Drax, we managed the piling works and attended the piling team for the length of their works.
Layer 4 of 9
Reinforced bases, pads, strip footings and ground beams, with the steel fixed by our own team and every pour planned to programme.
ProofOver 300 tonnes of reinforcement tied for the new bases at Drax.
Layer 5 of 9
All forms of concrete construction, finished the way you need it: tamped, brushed, or power floated to a smooth, glass-like surface.
ProofAn 800 m2 floor at Sizewell A, reinforced with over 30 tonnes of steel.
Layer 6 of 9
Foul and surface water drainage of all types, manholes, French drains and sewage treatment plants, including work in confined spaces.
ProofNew foul runs connected into existing manholes at Lakeside; surface water drainage at Bradwell.
Layer 7 of 9
Ducts, channels and bespoke service trenches for new supplies, plus diamond drilling and anchor installation.
ProofEvery service duct and channel for the new buildings at Drax, with a bespoke service trench for the supplies.
Layer 8 of 9
Reinforced concrete and tarmac roads, footpaths, kerbs, Armco and trief kerb barriers, block paving and patios, and fencing from palisade to timber.
ProofReinforced concrete and tarmac roads, Armco barriers and trief kerbs to finish the Drax project.
Layer 9 of 9
Brick and blockwork, stud walls, cladding, refurbishments, fit-outs and planned maintenance, taken through to completion.
ProofThe weather envelope on both Bradwell reactors and the overcladding of the Ponds building, 2017 to 2018.
Specialist Concrete Repairs
Cracks, spalling and rust stains are symptoms. Our repair teams, trained to NVQ Level 2 in concrete repair, work with UKAS-accredited testing laboratories to find out what is happening inside the structure, then repair it with a method chosen for how it will be used in future.
Pick the symptom that looks most like yours to see what it can mean, how we would investigate it and how it is usually put right.
These are common causes, not a diagnosis. Good repairs follow BS EN 1504, the standard for concrete repair and protection. Where structural design, cathodic protection or work over public areas is involved, a structural engineer specifies the repair and we carry it out.
Book a Condition SurveyTrack Record
Power stations don’t hand out second chances. Here is some of the work that built our reputation, from nuclear sites to a cantilevered home filmed for Grand Designs.
Feature Project
Our first job at Bradwell Power Station was a small partition wall. We went on to win our own minor civils framework direct with Magnox, and became the site’s reactive civils team, inside and outside the controlled areas, ready for planned and emergency work alike.
Between August 2017 and November 2018 we took on two large projects, completing the weather envelope on both reactors and overcladding the Ponds building, while still running the day-to-day works. In August 2019, with the station in care and maintenance, a small IDC team were among the last people to leave as the gates were locked.
Concrete bases, services and roads for the SNCR project: site strip and demolition, piling management, pile caps, steel fixing, and power-float finishes, with a night team to get the finish right.
An 800 m2 concrete floor inside the station, reinforced with over 30 tonnes of steel, prepared over several weeks before the pours.
Flooding had forced residents out. We renewed the drainage, damp proofing and flats to programme: new foul runs, French drains, insulated screeds, accessible shower rooms and kitchens chosen by the residents.
Groundworks and foundations for a cantilevered home on the Essex coast, first designed and granted planning for our own directors. The piling was filmed in 2019 and the house featured on Grand Designs in October 2021.
Accreditations
Supply chain teams shouldn’t have to chase paperwork. Our certificates and policies are current, and our prequalification pack is ready to send.
Each policy statement is signed by our Managing Director and was last reviewed in May 2026.
Qualified site management and trained operatives, from the excavator cab to the confined space.
Adding us to your supply chain? We’ll send our certificates and policy statements in one pack.
Request Our Prequalification PackOur Story
We have grown from a small team into a contractor trusted on nuclear sites without losing the friendly, straight-talking approach our clients came to us for.
“It takes a team to be successful.”
“Exceptional, professional – best contractors I have had on any project. I am not easy to please either.”
Questions
Can’t see yours? Call 01621 829705 or email info@idcorcoran.co.uk.
We are based in Maldon and work across Essex and East Anglia. For the right project we travel further: our work at Drax Power Station was in North Yorkshire.
Yes. Alongside main contractors and asset owners, we build foundations, drainage, driveways, patios and extensions for private clients, and the groundworks for self-builds.
Yes. We were based at Bradwell Power Station for twelve years, working inside and outside the controlled areas, and our teams hold confined space, asbestos awareness and entry, and Street Works training.
We manage and attend specialist piling contractors, then cap the piles and build everything that sits on them, as we did for Doosan at Drax.
We inspect first, then test: cover meter and Ferroscan surveys, cores, and laboratory tests for strength, quality and corrosion through UKAS-accredited laboratories. The repair method is chosen for how the structure will be used in future, and every repair is documented for your records.
Yes. Ask for our prequalification pack and we will send our certificates and policy statements together, so your supply chain team has everything in one place.
We are always glad to hear from experienced groundworkers with CSCS and CPCS cards, and from people with construction office experience. Email your CV to info@idcorcoran.co.uk.
Contact
Send a few details and we’ll call you back to talk it through. Prefer to talk now? Call the office.