The fire broke out at the firm's Craigmore facility in the early hours of Friday morning.
A fire which broke out at a waste management business in Ringsend in the early hours of this morning will be subject of 'an immediate and thorough investigation', the company's CEO has said.
More than 60 firefighters are currently dealing with the blaze at RiverRidge's Craigmore Road facility.
Speaking this morning, RiverRidge's CEO Brett Ross said: “At around 3am this morning (Friday 17th January) a fire was detected at our Craigmore Facility.
"The Northern Ireland Fire Service is currently dealing with the situation, and it is too early to assess the cause and extent of the damage.
"The fire will be the subject of an immediate and thorough investigation and both the Health and Safety Executive and Northern Ireland Environment Agency have been notified.
"Contingency plans for the company have been enacted and we have alerted key customers to assure them of our ongoing services. The collection of waste is ongoing, although there will be some disruption/delays to the likes of our skip services.
"I would like to thank the Northern Ireland Fire and Rescue Service for their immediate response and support and apologise for any inconvenience caused to our neighbours.
"No one has been injured during the incident.”
Meanwhile, the PSNI have advised that road closures are in place as a result of the fire.
A PSNI spokesperson said: "Motorists are advised that roads will remain closed in the Garvagh area for a number of hours while colleagues from Northern Ireland Fire and Rescue Service tend to a fire on Craigmore Road. Closures are in place at Ringsend, Cashel Road, Drumcoon Road and Mayboy Road. Please avoid the area at this time."
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