The mammoth mass of waste stretches to more than half a mile in length and weighs 330 tons, Seven Trent Water said in a statement.
They estimated that the fatberg may not be cleared until June.
“While the true extent of the blockage won’t be known until it is removed, it is likely to be one of the biggest blockages Severn Trent has ever dealt with,” the company said.
“It’s a massive project and it’s not resolved yet,” added Scott Burgin, operations manager at Severn Trent. “This giant mass is the result of everyone occasionally washing and flushing the wrong things down the drains, and not…
